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How to Remove, Clean, or Bypass the EGR Valve on Trafic, Vivaro, and Primastar Vans

I am interested in cars and do my own repairs where I can. I like to share any knowledge I have to help other people where possible.

Do you want this in your engine?

Do you want this in your engine?

This article is about EGR (exhaust gas recirculation) valves, their effects on your engine and how to remove and replace them. When I was looking for advice on this, I couldn't find anything specific to my van, which is a Renault Trafic, so I thought I'd write this article.

This is for anyone out there who has a Renault Trafic 1.9dci, Opel/Vauxhall Vivaro 1.9dti, or Nissan Primastar 1.9dci van and wants to know how to locate, clean, replace, or bypass the EGR valve.

What is an exhaust gas recirculation valve?

The exhaust gas recirculation valve is attached to the air inlet manifold. Under certain circumstances it opens up to feed exhaust gases into the air intake of the engine.

There are several reasons for this, the first is that it heats the engine up quicker from a cold start, which leads to improved efficiency on short journeys as diesel engines don't run efficiently when cold. The engine also creates less NOx, which is better for the environment.

However, exhaust fumes being pumped into the engine means there is less oxygen available, as the fresh air that is sucked in from outside is mixed with exhaust fumes. This leads to sooty carbon build up inside the engine and also has an impact on performance as your engine is using air mixed with exhaust fumes rather than fresh clean air.

A common problem with EGR valves is that they clog up with soot and don't function properly. They are supposed to only be open in certain circumstances and are controlled by the engine management system. If they clog, they can stay open all the time which leads to poor engine performance.

There are several options available to you when it comes to the EGR valve. You can replace the valve with a new one. You can clean your valve with carb cleaner and refit it. Or, you can blank or bypass the valve completely. I chose to bypass the valve on my van. This means the van only uses fresh air rather than air mixed with exhaust fumes, which has the benefit of increased performance, better fuel economy and faster turbo spool up. It also means that the engine isn't being clogged up with soot and other crap and I don't mind the engine taking a little longer to warm up on short journeys. As it happens it seems to have made no discernible difference in the time it takes the engine to warm up to operating temperature anyway.

If you have a Renault Trafic, a Vauxhall Vivaro or a Nissan Primastar, then this guide will work as all these vans are essentially the same van with a different badge and all use the same engine. There are several different types of engine available for these vans, this guide covers the 1.9 engine although I will add some pictures of the 2.0 engine later.

To find the EGR valve on the 1.9, first you need to remove the plastic engine cover that rests over the top of the engine (if yours is still attached that is), you then need to look on the top of the engine, to the right of the airfilter box. The valve has a plug going into it, which is the solenoid control wire. To remove the EGR valve, firstly undo the connector, use a screwdriver on the clip to loosen the catch and then slide it off.

Trafic / Vivaro / Primastar 1.9 EGR valve location


How to remove the EGR valve

You then need to undo the three bolts that hold the EGR valve in the manifold. I'd recommend removing the bolt on the right of the airfilter box before you touch the EGR valve. You can then lift the airbox out of the way which will allow you slightly easier access to the EGR valve with your ratchet.

You need a 10mm spanner or socket for both this bolt and the three bolts that hold in the valve. You can undo the top two bolts for the valve with a ratchet with a 10mm socket and an extension bar. I couldn't get access to the bottom bolt like this though and had to use a 10mm spanner as access is just too tight. Once you've got the bolts undone, then half of the EGR valve should easily lift off and out.

Undo these 10mm bolts


Once you've got the first half out, then a screwdriver can be used to gently pry the valve out. It took a couple of light taps with a hammer on mine to get the valve to move, but then it pulled out pretty easily. After it is out, then the first job is to marvel at how much soot and crap there is on there. You can then get your carb cleaner and a rag.

Spray the carb cleaner in the hole where you pulled the valve from and give it a good wipe with the rag. This is a bit awkward so you'll need thin hands. Ideally get your wife or girlfriend to get their dinky hands in there to really reach in and get it clean. If she's away, doesn't fancy getting her hands dirty or you have a fat wife with big hands then you'll need something thin to really get the rag right in there so this is when you need to get in the garage and find a good poking stick to push your rag in there.

After you've scrubbed that out, then give the EGR valve a good spray with carb cleaner. It is amazing how quickly it melts away the soot, but a screwdriver and a rag is still useful to get the caked on bits off.

At this point you can either refit the valve, throw it in the bin if it has shot it or blank it off by putting it back in the hole and turning it 180 degrees. If you do this, then the part at the bottom with the hole, which is the bit that opens and closes to let the exhaust fumes from the exhaust feed at the bottom of the valve into your air intake is now at the top. This means that it won't be able to let any more gases in and out.

If you do this, then you'll need to fit the part that fits into the manifold first, including the gasket, making sure you've turned it 180 degrees when in situ. I pushed it all the way in, then used a hammer to gently tap it round til it was in the right position. Then refit the solenoid part (the part on the right in the picture below) the original way up. All 3 bolts will then fasten back into their original places. This allows you to fit the wire connector and also means that the valve is still connected up the engine management system, which means that the engine still thinks it's working, even though when it opens the valve then no exhaust is allowed through. If you do this, it won't throw an error code.

Turn the EGR this way up on the 1.9 engine to blank it off


The photo below shows what the EGR valve looks like when it has been bolted back into place in the manifold. As you can see the outside part lines up correctly and all 3 bolts go back into their original locations, but the inner section and gasket still seals the EGR valve into the manifold, but the bolt holes no longer line up. The hole at the top is the hole for the bottom bolt, but is now exposed as the inner section has been rotated.

This isn't a problem, the EGR is still airtight and secure. It can take a bit of fiddling to make sure that the inner section is turned at 180 degrees, but you'll get there!

All 3 bolts in place with inner section rotated


After this you're done. If you've turned the valve to blank it off then you should find the van is perkier to drive, with a bit more power and a faster turbo spool up time. Apparently the fuel consumption is improved by around 5% as well. I haven't measured this to confirm it, but any potential increase in mpg is a bonus in my opinion. Plus you know the engine isn't being filled with exhaust fumes, soot and carbon which should lead to longer life and also gives you a nice warm feeling inside.

If you've decided to keep the EGR valve functioning, but have cleaned it all out so it works properly then you can be happy that you're doing your bit for the environment and your engine should now be performing smoothly again.

I have written another guide on how to change the MAF sensor. Once again this applies to Renault Trafic, Opel / Vauxhall Vivaro and Nissan Primastar vans. You'll find a link to it by scrolling down the page.

If you have any questions, or comments, please leave them below. Enjoy your van!

This is the carb cleaner I use to clean out EGR valves, throttle bodies etc etc!

This article is accurate and true to the best of the author’s knowledge. Content is for informational or entertainment purposes only and does not substitute for personal counsel or professional advice in business, financial, legal, or technical matters.


Robert on August 05, 2020:

Can i I bypass the EGR valve on my 1989 for ranger

Cucikas on February 23, 2020:

Hi to all. I did have problem whit EGR valve, my van Renault master dci100 2.5l, 2005 year, problems no power up to 2500 rev, I changed EGR valve, still same problem, then I just unplugged cables from EGR valve, simple and it works, I believe no wan say anything about electric fault, this is the 5v power supply from ECU, I attached link from yotube how to test and fix the problem, it is easy, and I hope it helps to most of cases, you can try this be for you go to any garage and start changing any parts. SORRY for my English


Rooney on October 06, 2019:

Hi. İ wanna ask you. When i clean the egr, do i need to clean the place where it plugged. İ mean the Hole?

Ben Williams on September 02, 2019:

Thanks for that just cleaned mine on my Trafic and so far it seems to have solved the problem. Cheers. Ben

jjimmy tomkins on July 20, 2019:

my 1.9 vivaro has no power until it reaches around two and a half k revs.sometimes nothing only tickover.

i changed air mass valve . cleaned erg valve.

changed back to old airflow meter.

still the same.

i changed the airflow meter afain back to the old one.and everything was perfect fir a few minutes- then back to no power until it eventually reaches 2500 revs then the power is back.

any ideas?

Mot Tuna on March 09, 2019:

Thank You so much for your general description and function of an EGR valve! It gave me info to suggest that my '04 Nissan Frontier 2.4L might benefit from an EGR valve bypass. It worked!! Took the sputtering/misfire out! Myself and 4 mechanics tried many other things that didn't work. Computer diagnostics only reported "cylinder 4 misfire." Peace

Steve H on February 18, 2019:

Hi, ive got a vivaro 2.0 cdti 09 plate of which lacked turbo boost. This it how i solved the puzzle. Turn Engine / ing off.remove airbox/ filter etc..

The turbo will only allow boost if the waste gate will allow. The waste gate is a sort of pressure relief valve controled but vacuum. This vacuum is controled by the boost pressure control solenoid found on the bulkhead on the right side of the engine compartment. It has two pipes connected and a electrical plug. In a normal boost state there is no power given to the solenoid. Vacuum in and vacuum out. Pull both pipes off so you should be able to blow through solenoid. With this done,test the two pipes. One pipe goes to the wastegate actuator. Blow down it. You should see or hear the actuator move. If all ok check other pipe. The other pipe supplies the vacuum via a T piece from two different sources. Disconnect each pipe and blow down and make sure all clear and not split. Now check T Piece. This sucker gets blocked and makes all the difference. Two ports are the same size but one port has a tiny less than 1mm hole in it. Clean with a needle or small drill bit. Reconnect all pipes. Put airbox back etc.. if you start the engine you should notice a decent vacuum on one pipe. Put thumb over it!! If so thats it!! Reconnect anyway round on boost solenoid. Mines back to its old self!! Code2263 was shown as the fault code. Easy and cheap fix. Good luck all!!

mark farrell on January 30, 2018:

hi i have 02 trafic 19 dci 100 that will only start with easy start ive changed heater plugs every filter and turned ECG 180 degrees other than set light to it eny ideas

Ashley Walsh on November 20, 2017:

Hi all. I’ve just joined this eve. Done tonnes of work on these vans, got 2 of them with well over 200k, and changed pretty much every sensor there is over the years,had all the problems with not reving, or only reving to 2.7 rpm or missing as its revs, or just no power and sorted them all. Just put a Laguna engine and box in my van and now it’s running ok ish. But lacking torque low down and smokes like something else.

I have a feeling that my Maf has got contaminated with triple x spray so will give the cleaner a go Tomorrow, I’m also working on modifiying air box and eve to improve power.

Chris b on October 29, 2017:

Hi ive taken my egr out a few times to clean it and put it back in. I now want to blank it off so got a little plate of ebay. Should i remove the valve completley or leave the bit inside then put the blanking plate on? Thanks.

Noel 2-5L Dci150 on May 30, 2017:

Hi rain defence , Thanks for all these useful information,

Can you tell me where to find my egr and how to do this pypass on a 2008 2.5L Renault traffic van?

I would greatly appreciate

Simon Stocker on May 21, 2017:

I have an 03 Renault traffic Deisel have an issue with the coil light coming on intermittently under acceleration it had been suggested that may be egg valve,I have cleaned it out thouroughly but still have the issue anyone have any idease.

OJW on April 06, 2017:

Are there any mechanics in the Leicester area willing to blank off this valve on my Vivaro? For payment, of course. Replacement's going to cost £300.

leonard on March 02, 2017:

my 2010 vivaro is displaying depress foot brake sign on the dash board and when the van is started and gear is initiated to 1 drive its not moving but is displaying depress foot brake.. therefore I cant move the van. pls need help.....

Stewart on January 07, 2017:

Thanks for the article. Very helpful and we'll explained.

Daz on November 02, 2016:

Drives like a dream , great advice

Steve on September 18, 2016:

Have vivaro van..because of poor acceleration renewed air filter + fuel filter + and new air flow sensor but still same...I cant drive it What i would like to know...the pipe that the air flow is connected to does that fit else where and if it does would that cause problems if it came away from the other end...Please

shane on September 08, 2016:

Hi I have a vauxhall movano with the same egr as yours iv decided to blank it of as iv cleaned it and worked great for 200 miles now it's got that flat spot back but iv got a broken bolt on mine will it still work

Darren on July 10, 2016:

I have a 2.0L Vivaro. It keeps misfiring in the morning especially and when im high reving in 1st and 2nd gear mostly do you think blocking the egr valve will stop this from happening? Thanks in advance

John on June 10, 2016:

Just turned my egr valve as said in your information. Now will not Rev above 2500 revs any ideas

Mark on June 09, 2016:

When I start my Renault Trafic it does start but idles for a while and I am unable to rev the engine. After a couple of minutes I am able to rev the engine. Could this be because of the EGR valve? Thanks.

Martin on June 08, 2016:

Excellent article, one of the most informative I've seen.

Anyway I've cleaned out the egr valve with decarb spray and put back on the van the correct way up and now the van is driving like it should. Thanks very much.

Dan on June 06, 2016:

Did this and now there's a ticky/tappy noise coming from the engine when driving not sure if it's a coincidence

Dave Keenan on June 02, 2016:

Hi, Mate you are a champion, thanks for helping out .regards Dave

Anthony on May 29, 2016:

Hey mate, awesome article.. took me 100 hits with the hammer to get both parts out eventually and a few gashes :O rotated the inner part of the egr v and aligned the bottom right hole so was able to use this when putting the outer part back on.. when i started it, it turned over a couple times till it wouldn't anymore.. further attempts were worse until eventually the service light started flashing. Had to reset computer and reinstall in the standard position to get it working again.. also notice my air flow meter hose had blown off during this.. I really want to blank it out for a bit more power.. any idea why mine had this result and what i might try.. Cheers mate

Despot56 on May 17, 2016:

Great explanation and photos. Made the job easier than I expected.

All good now, thanks.

Mike 123 on April 21, 2016:

Did this today and all working well. I would say though that separating the valve was quite tough, however.

Many thanks agaain

craig on April 06, 2016:

my wasnt starting just done it and works fine thanks for the advice..

bigstu63 on March 30, 2016:

also it starts first time every time raining or not. the maf sensor was changed out because it came up as a fault.

bigstu63 on March 30, 2016:

morning. have a 03 1.9 vivario

when it rains the engine will not rev up. cleaned gutters and down pipes as water was getting onto air filter. full of silt. changed maf sensor worked better but now every time it rains it will not rev up. couple hours drying out and its fine again. any ideas?????

Douglas on February 27, 2016:

The best article I've read on van maintenance! Clear, easy to understand and great photos. Brilliant..and saved me a few quid as well.

luis pacheco on January 02, 2016:

good I'd like to ask a little thing

I have an Opel vivaro 1.9 dti 2001 and she did not have much strength and has a very strange symptom

1- when I go to puchar the changes she not pucha right pucha and then stops and puchar back soon puchar this only happens when I walk en 6 change already changed the EGR valve mass air meter and remains the same

2 can help and am I of Portugal and tou gartar fed up money and tou unhappy with truck

if you can send an email with what I can do thanking thank tou desperado

- Email lpdesentupimentos@gmail.com

Windows87 on October 04, 2015:

Had this fault on my Vivaro 2002 and it was the fuel line letting air in. Did you replace your fuel line John.

john on August 01, 2015:

hi had a problem with 1.9 vivaro going into limp mode at 70mph changed egr and maf and boost sensor found out it was a blockage were the boost sensor fits drove about 20 miles evthing ok then I spotted a diesel fuel leak so I also fixed that.now after about ten miles of driving the van starts to become sluggish and slow could this be a prob with airlock in fuel system due to a small hole in fuel line no management lights have come on many thanks john

mike on June 16, 2015:


is it enough just to unplug the EGR valve?

Cucikas on June 04, 2015:

Hi to all. I did have problem whit EGR valve, my van Renault master dci100 2.5l, 2005 year, problems no power up to 2500 rev, I changed EGR valve, still same problem, then I just unplugged cables from EGR valve, simple and it works, I believe no wan say anything about electric fault, this is the 5v power supply from ECU, I attached link from yotube how to test and fix the problem, it is easy, and I hope it helps to most of cases, you can try this be for you go to any garage and start changing any parts. SORRY for my English


Neil sarge on May 14, 2015:

My van pisses out black smoke on pulling away, and when accelerating pretty much anywhere,flat,downhill,uphill, had the egr valve changed oct 14 but it's since then that I've noticed the smoke issue, had new cat fitted, air,oil and fuel filters done and injector cleaner put thru but nothing as worked yet, still getting black smoke, any ideas?

jamezy rutland on April 11, 2015:

followed your procedure on EGR valve on my vivaro & what a difference its made, did the 180 degree bit to blank it off & everything now hunky dory, liked very much the bit about having a fat wife, fortunately I have neither a fat or thin wife thank god so had all the time in the world to do the job properly without any nagging, a great tip & very easy to follow. ps I also broke a lug of the part of the erg valve that fits in the manifold but got it out & you don't use the holes when refitting so no probs there .

Joe on April 05, 2015:

I have a 1.9 traffic 05 plate, my van was running fine, no real major issues, no Rev issues, no smoke but it was suggested I try this. I got the first part off, couldn't get it out the manifold, I broke part of the flange when tapping sadly.

So to prevent any more damage I put back together but now I have no revs past 2k and it's slow getting to that! So I can't drive! I didn't touch the EGR really, what could I have done?

SheilaM137421 on February 21, 2015:

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will on February 09, 2015:

Thanks for taking the time to make it easier for use all..I removed mine and cleaned it and put it back 180 degrees so the valve was facing the top..It was easy and it's made a difference between 1 and 2000 revs which was terrible before..It drives better round town..Many thanks for people like yourself...

rusty on February 06, 2015:

took my egr valve out on my renault 2006 1.9 dci cleaned it and turned it around but it wouldn't rev ???

its all gravy on January 28, 2015:

hi great articles.

I have an 04 vivaro 1.9. its a bit slow to start and seems to misfire until it is warm usually when it gets to about 80 degrees, it then drives normally. its only sluggish when cold. had egr replaced maf sensor cleaned, changed the glow plugs but still the same. no lights illuminated on dash. any help would be great cheers.

patrick lilley on December 23, 2014:

is the 2litre erg valve same as 1.9

pascal on December 17, 2014:

this worked fine for me it improved power some what but i think i might have other issues such as booster solenoid ect what i wanted to ask is after blanking of valve i have a fault reading p1401 all i wondring is will this effect the turbo or anything else thanks

darren on December 05, 2014:

Hello,I just tried to remove the egr valve got it split into two,but couldn't get the inside part out,you said pry the valve out with a screw driver is that trying to get it behind it between the manufold and the valve or pull from the centre?

Stephen neal on November 04, 2014:

Renault scenic 2001 dci f9q engine electrical fault/glow plug light .

Hi i would like to add this i have completely removed the egr out of the housing and I must say it works like a charm using a blanking plate and still using the electrical part of the solenoid with high temp sealent I had a problem with glow plug/electrical fault light coming on now and again when driving up hills or coasting this is what was causing g the problem forget all boost valves glow plug really boost solenoid it's simple I now this is a very common fault with f9q engines .. first have a look at the egr recirculation pipe this is located under the egr housing if it's oily or damp with carbon I put it this is your problem pressure lose from turbo intercooler system I took it to a guy who put it on the computer and I read glow plug circuit and egr flow. First I removed the egr valve from the housing u will need to block the tin pipe I used a half inch 3/4 drive socket use a long threaded bolt through the socket place 2 nuts on each end with washers tighten tight drill through the ends were the nuts are place a split pin so nuts don't fall out and smash the turbo vains up place socket inside the ton pipe I used high temp sealent around the the socket and tin pipe and refit using the clamp clamp the tin pipe against the egr housing and it's completely sealed I no this works I'm running my renault scenic 1.9 dci 2001 f9q engine . You will have full flow from the intercooler to turbo no restrictions my mpg has gone up to 54.4 mpg driving at 60 mph on a 2001 car it's brilliant my turbo went so as i had it all in bits I done this good luck people

Nick on November 03, 2014:

Hi Rain Defence. Can I just say never come across such a well explained article in all my time. Thank you very much for your help, learnt a lot! Very genuine man!

aos26 on October 05, 2014:

Hi I have a 2005 primastar that all of a sudden has lost power.it drives but a lot slower than normal.sometimes the glow plug light comes on and the van goes into limp mode.I took out the egr valve and cleaned the back of it..mine didn't want to come apart from were the bolt holes are and i wasn't sure if it was supposed to until i seen your picture above.ill try that again today..do i just lever it apart?any other ideas would be great..thanks Andrew.

John on September 15, 2014:

hi have got a traffic 115 2007, m9r 2.0cc engine. problem is that it stalled the other night but when I went to start it again it just run for about 3 seconds and cut out again it keeps doing this,put it on diagnostic and it came up with a code P2149 with the defo saying fuel injector group" B" supply voltage circuit/open. not sure what this means!! If it needs new injectors or if there is a wiring fault,any suggestions would be much appreciated thanks.

John on September 07, 2014:


My egr seems to be riveted together (has been replaced in the past) I tried prying it apart but I think they need drilling out.

Also once the inner part has been rotated 180 does the inner bottom bolt hole line up. I know the out holes Line up but does the inner bottom hole line up.

Many thanks

Rain Defence (author) from UK on September 01, 2014:

The concept is the same even though the layout is a bit different.

Barry Needham on August 25, 2014:

will this work on a Renault 1.5DCi engine looks like the same EGR valve.

jules mew on August 17, 2014:

Have done the egr and maf cleaning. I have two fault codes 1826 glow plugs relay and 1804 boost pressure sensor. Where is this sensor please?


JulVivaro on July 18, 2014:


Great article! I did what you told and it work perfect. Thank you so much for sharing this!

Now an other question. Because the EGR is not used now .. the MAF is also not needed anymore. I understand that the MAF can be replaced by a diode on the plug.

-Does someone know which value the diode need?

- Which pins do I need to use with this diode?

I drive: Opel Vivaro 1.9DTI, 2005

Thank you much!

Kind regards,


Jul on July 18, 2014:

Hello everyone,

I was happy to found this article. I did exactly what you told here and it work perfect! Thank you very much for your information.

But now I would like to replace the MAF by a diode. Do you (or other members) know the value of this diode and how to connect (which connection numbers of the plug)?

Thank you much!

Kind regards,


Opel Vivaro 1.9DTI 2005

Rain Defence (author) from UK on June 29, 2014:

I have exactly the same problem on mine! If you find the solution let me know!

Steve K on June 28, 2014:

Thanks for a great article and your advices Rain Defence.

I will follow it up.

Now off topic.

I have problems with my windshield wiper motor.

It will not stop at correct place. Its stops randomly on the

windshield. I have change the motor but the results are the same.

Any ideas wat to do now?

Vauxhall Vivaro 2001 101 hp.

bobo on June 27, 2014:

Egr valve helps the engine. Removing it fuel consumption grows by 5%, engine suffers as it must absorb shocks from turbo, also clutch-transmission gets affected by that new behavior of the engine, engine becomes noisier, life span of the engine is affected (shortened) as the combustion inside cylinder raises above 2.500 Celsius. Without egr the car gets smookie

Rain Defence (author) from UK on June 03, 2014:

Thanks for your comment, best of luck with it.

kroutneul on June 03, 2014:

very interesting article and comments i will try rotating mine at weekend many thanks

dave on May 24, 2014:

Hi great erg article I have a 07 vivaro done 90.000 miles

loads of white smoke from cold start doesent seem to be using water could this be a symtom off dicky egr rgds dave..

Robin on May 17, 2014:

Hi I have a vivaro 07 m9r 2 lt diesel

My engine light came on and I had it checked on the plug in fault finder,it came up with code for glow plugs,at the expense I had 4 new ones put in,all 4 removed ones were burnt out,

After putting new ones in and trying to eliminate the dash light it stayed on

Engine still runs fine but light on

What causes the plugs to burn out

Should I look at anything specific

I've unplugged the new ones in case the new does the same as the light was still on so new plugs didn't seem to rectify problem

I'm now lost ,any help with thanks

Rain Defence (author) from UK on May 01, 2014:

It will be online with air inlet, so track through from the air box and you'll find it.

Ian on April 11, 2014:

Hi there

Been having probs for a while now(03 vivario) first was diesel leak then clutch went and at same time a whistling sound started which at first I thought was clutch related but was the same after new one was fitted. Have cleaned out egr b4 when van was smokey and it worked a treat . But now have the orange light on and fault saying turbo pres sensor fault and the van has no go in her at all till 2300rpm.

When I disconnected maf sensor it runs like a train but if i let it idle for 3 seconds then it drops into limp mode and is un drivable till I restart engine get revs up and Im off.

So took it to Diesel specialist to get leak sorted (leaking from pump) and they have tried new maf / tps but still comes up with fault???..... they are saying that whistle sound is more than likely the turbo and so it looks like im heading down that route....so looking at a £1000+ bill !!!!!!! Does this sound plausible.........

Thx Ian

rich9001 on April 07, 2014:

Hi I copied ur process of doing checking the egr valve but my engine is different. Its a 2009 1.9dci sl27. The air box is on the top so removed it to hopefully find the egr behind in the same place as described but it isn't there any ideas where to find it and any ideas how to get to it. I was hoping to find it as the engine is very flat especially when it has warmed up. It struggles to rev above 3000rpm and feels like I'm driving with the hand break on if you know what I mean. The van has only done 34000 so not a lot at all. I have cleaned the maf sensor. Any ideas would be greatly accepted.

jamie on April 06, 2014:

Hi, if i don't have black smoke but have both the cutting out and loss of power now every 1/4 mile could it still be EGR or MAF? or something else. both engine management light and coil light come on and has been checked by both garage when lights were on (showing as air mass) no difference when fitted and breakdown but shows no faults. sorry have a nissan primaster 1.9

vanup on March 31, 2014:

Great post and very informative... changed/cleaned a lot of EGR valves, but can't find mine on a renault trafic 08 plate?. Is it cylindrical like the pics. Cheers

Stuart Wheeler on March 30, 2014:

Hi there mate just wondered whether you could help me out. I have a Vauxhall vivaro 1.9dti and over xmas just gone had a few problems.. basically it was running terribly and eventually died and would not start. went from garage to garage by tow and eventually had new MAF fitted and injector wire and worked again lovely. Following this (2 days later) the cam belt and water pump went, had this work done but then realised the van began to drive sluggish dropping into limp mode and coil light would come on and also the speedo would stop working.. this would happen for a while then here and there it would kick back in to full power and light would go out and speedo would start working again. Ive had it on the machine and only came out with 'ho2s heater circuit high'. It does it all the time now! I don't know a lot about vans and am a self employed roofer.. I have spent £700 on this van in the last few months and just wondered whether you could put me in the right direction so I could get parts and get sorted instead of having a mechanic charge me a bomb for no info as they seem to be doing! Cheers mate. Stu.

acedit on March 10, 2014:

Hi, I have what I think may be a related issue however I don't know. I have had issues with my primastar cutting out just after starting. my mechanic messed about with it and "repaired it" by changing the fuel lines or something. was fine for 2-3 weeks but its started again. anyway, in your second pic (where you locate the EGR) just under the arrow is a fitting on a hose with 4 wires attached. Mine has 2 cut and taped over, it looks like yours has one cut too. What is this part and why would some one think its okay to cut and tape the wires? and is this part of my problem?

Thanks for reading this and your article seems very informative even if I don't have a clue what it means!


Rain Defence (author) from UK on March 09, 2014:

It will just pull apart if you try a bit harder! Try a flat head screwdriver.

jim on March 08, 2014:

Hi..ive tried to split the valve in two but have realised that where the bolts are its all sealed do u have any other suggestions please apart from this problem your information has been very useful thank you kind regards

steve on March 04, 2014:

Regarding Gareth post I have changed glow boost solenoid it still the same look under the egr housing yes the recirculation pipe o-ring is leaking you will have to remove the inlet manifold to access this once removed pressure wash the manifold housing clean fit new o-ring also you can disconnect the egr lead this will not fire up the light but this does not fix the problem .

Hope this helps

Aaron on March 03, 2014:

Hi wonder if you can help me.ihave 1.9 renault traffic it's sluggish from 2000 revs to 3000 revs .i have cleaned the egr valve .but I have black smoke when revving and driving .its ok when aim at steady speed but as soon as I put my foot down it puffs out black smoke and smells.if aim parked up and rev van it leaves lots of black soot on floor many thanks aaron

Gareth on March 01, 2014:

Regarding post from stephen Neal...,I have the f9Q dci engine in my 2002 scenic,exactly the same problem as stephens car,I have removed my egr valve,split it and refitted upsidedown with no difficulty,still have the glow plug light coming on and power loss when engine is under load,when this happens I have to take my foot off the accelerator,the glow plug light goes off and the turbo spools up again and the car is back to normal....till the light comes on again !,just can't quite understand stephens fix...was it a perished o ring on the steel recirculation pipe the fault or something else ?I have thought of bypassing the boost solanoid valve by joining the two rubber pipes together,has anyone else tried this with success ?help appreciated !

Rain Defence (author) from UK on February 26, 2014:

Is it inline with the air inlet?

Darren on February 26, 2014:

Could somebody please help me. I'm trying to change the EGR valve on my 09 plate traffic, it doesn't look like the pics on here so want to make sure I'm not pulling of anything I don't need to .... Please help!

Rob on February 25, 2014:

Firstly thanks for the initial post regarding the EGR, very handy with pictures. I've had very similar problems to previous posters and thought I'd share just in-case its of any help. Every time I went over 2000 revs, it would light up with the glowplug light and go to limp mode. I tried changing the MAF, cleaning the EGR, changed the boost solenoid, but still no joy. Had two separate mechanics look at it one even admitted he was defeated as he was reading out from his diagnostic equipment and it was all correct but yet failing each time. So I decided to take a look myself, I removed the air filter box, the MAF, then the intercooler hose, the small tubes too and from the turbo wastegate, the solenoid, on all the items I removed, I made sure everything was clean and the hoses had no restrictions. I made sure that the vacuum pump port was clean ( I knew the pump was ok as I still had my brakes) then on the nipple on the back of the housing that holds the EGR valve, I poked a 3mm drill bit as that was clogged, that was my problem! I made sure the wastegate was ok by connecting a tube and sucking on it, it should more with out too much effort. Then connected everything back up using cable ties on all hose connections to ensure no leakage. I still have a little bit of lag lower end (MAF sensor on order) but no more limp mode, all solved by removing a tiny bit of gunk on the vacuum tube.

Steve neal on February 20, 2014:

Hi I've changed boost solenoid also map sensor still the same as for the steel pipe it has a oring that seals it , it can't come lose as it is held in via manifold it isn't bolted to the manifold, so manifold strip down will be required and new O ring fitted this will fix this pressure lose thanks for posting the first message good luck people....

Rain Defence (author) from UK on February 20, 2014:

Well I think you need to get the pipe attached securely as it sounds like it has come a bit loose somewhere.

Rain Defence (author) from UK on February 20, 2014:

Too hard to say by just reading but at least you can rule those two things out if you do them.

Stephen neal on February 18, 2014:

Hi great info

this might be a very useful information on Renault 1.9 dci F9Q engine fitted to a lot of cars throughout the range I have had a problem with my scenic electrical fault /glow plug light coming on now and again even when cruising at 30/40/50/60 any speed really if I hit a bit of a hill slight incline the glow plug fault light would come on by taking my foot of the accelerator the light would go out so by following your great advise by blanking off the egr valve semi fixed this but didn't cure it I have finally found the fault. at first I changed the glow plug relay then glow plugs, then boost solenoid and map sensor still the same

This is what's causing this very common fault ignore all solenoids valves etc...

Under the egr housing there is a steel recirculation pipe to send gass back through the engine for re-burning on mine it was covered in oil/carbon even by turning the egr around it doesn't stop all gass entering the pipe so this was causing pressure lose a o-ring that has perished the intercooler system has not enough pressure. the map sensor and boost solenoid sending mixed messages to the ecu this firing up the fault light so check all pipes around the egr housing the small black pipes the inter cooler pipes this is so common on the F9Q Engine so I'm hoping this will get posted so many people can get round this very common fault.

Good luck people....

Flyboy on February 18, 2014:

There are no leaks of fuel but I can see air in the pipe!!

Rain Defence (author) from UK on February 18, 2014:

Are you sure the fuel pipes aren't leaking somewhere? Sounds like you've got air getting in somewhere.

Flyboy121 on February 16, 2014:

Hi my vivaro 2005 needs me to prime the hand pump every 4 to 5 hours to get it started?

Rain Defence (author) from UK on February 07, 2014:

Thanks for your contribution, my next van will be a newer one so I'll take a few pics to update the hub when I get it.

TC on February 06, 2014:

Just cleaned EGR on Traffic 07...pretty easy job..valve etc is at the front of the engine and nothing like earlier models. Look on ebay under EGR. The valve is not the cylindrical one that can be turned through 180 degrees but the larger type. Hope this avoids confusion with earlier posts and the suggestion that covers need to be taken off...THEY DON'T.

Richie on January 27, 2014:

hi i've got a 57 2.5 auto traffic which goes into limp mode with the glow plug light showing as soon as the slightest bit of strain is put on the engine. The fault re sets itself every time the engine is turns off and re started. if i drive it like an old lady being super gentle on tbe accelerator then the lights and limp mode stays off but the second i squeeze the accelerator just a little too much we get the orange lights back and limp mode. I have done quite a bit of motorway driving lately and while just leaving it in limp mode and on about 4 occasions while in limp mode the engine has cut out completely with a bunch of extra red lights coming on. on each occasion i have coasted to a stop, turned off ignition then restarted which has straight away cleared all faults and away we go again. ive taken this to the dealer and they have said its a leaking fuel rail and will be £1000 to repair but i really don't want this to be the start of an expensive trial and error game at my expense, i haven't done the EGR mod or checked the MAF sensor yet which do sound promising and i will do but does this fault sound like something that would be cured by both of these being done or could it possibly be something else like a leak in the fuel rail?? Great info on here btw its so hard to find genuine practical knowledge on these issues,

Baza on January 26, 2014:

Hi I did this on my vivaro 53 plate 1.9dti was running fine before just turned egr 180 degrees an went to start was hard to start an now won't rev above 2000 any ideas?

Rain Defence (author) from UK on January 10, 2014:

I will do when I get time. Am planning a few more how to articles soon as soon as it gets a bit warmer!

Shorty on January 08, 2014:

Great guides both have been very useful and easy to follow. Are you still intending to do an article on the boost sensor ?

Rain Defence (author) from UK on January 08, 2014:

Thanks a lot. Always nice to hear that someone has found it useful.

Phil on January 05, 2014:

Thank you very much for this really helpful guide.

Rain Defence (author) from UK on January 03, 2014:

Glad it helped you. Mot man won't have inspected the air filter for the mot, the bolts probably just worked loose themselves.

Rain Defence (author) from UK on January 03, 2014:

Check out my other article on how to clean/change maf and give that a go.

TIGERMUSTAFA on December 30, 2013:


I have a nissan interstar 2006 dci MWB, i bought it back in 2009 from an auction it drove fine first than went in limp mode wont rev above 2000rpm

eventually if you let it runnig not driving it will be ok any rev it will make it but than when you come to a hill even if you're in the right gear engine management light will come on with flashing stop light and will cut out it used to start again but it just got heavier and heavier and now wont start at all only with easy start.

I regularly get it serviced and do take care of the van.

took it to so many mechanics but they all talking about different things

which makes me think they will just try this and that and it will end up costing me £££££

so far from you guys i have cleaned the egr (not blanked it)

changed the crankshaft sensor from renault original part

changed fuel filter and checked for any leakage (there was a tiny leak on fuel filter housing played with it little bit van was ok for two weeks start every time but still in limp mode for a while than drives ok..



Andy parting ton on December 26, 2013:

Thanks just cleaned the egr and maf and all seems ok after collecting it from its mot and it mysteriously starting to have no power , also tightened the screws on the air filter had he left them loose on purpose??!!

Rain Defence (author) from UK on December 19, 2013:

If he's said he'll have a look but it won't be cheap, my best advice is find a new mechanic. He doesn't even know what it is yet, how can he say it won't be cheap?!

I'd be checking the idle control valve in your shoes. Good luck and let me know what exactly was wrong after you've got it sorted.

mikey on December 19, 2013:

hi my vivaro 02 is cutting out when I get to lights & junctions but then it wont do it for few days its really puzzleing me, ive took it to a garage today hes told hell have a look but it wont be cheap so im just asking for advice of what it could be so I can relay this information to him so he doesn't rip me off just before xmas please advize

Interlineal P.E.Ruser_ P.robable E.rror. on November 25, 2013:

I've been thinking along the same lines as Steve Neal about removing the EGR valve altogether and sealing-off the exhaust opening within the housing itself, as the stupid EGR valve must be restricting the fresh airflow quite a bit, which will hamper the turbo trying to spool-up. I don't live in a cold climate here in OZ so I don't really need the EGR's assistance, and I certainly don't need to be squirting any percentage of dirty exhaust gas back through the engine on my 2005 1.9 LWB Traffic.

I pulled my turbo boost solenoid apart and found that it's another stupid device, in that it doesn't actually entirely seal-off one pipe from the other, even when brand new, because where the stainless steel disc sits there are several cutouts underneath it that prevent it from ever performing a complete seal, so I removed it altogether and just joined the two rubber pipes together with a short [1 inch=25mm] piece of black garden trickle irrigation pipe[zero co$t].

On another note, the fine-wire mesh in the MAF sensor must also be restricting airflow far more so than the EGR valve does. I squirted half of a very large can of contact spray inside my MAF sensor and apart from hitting the sensor wires with the spray, I gave the fine wire mesh a darned good spray too, so as to help increase airflow through it. It woud've been cheaper to apply just methylated spirits with a small paintbrush on the mesh per se, but we live and l*earn*! I put it back together and although there was a slight improvement with the MAF sensor connected electrically, it still wouldn't rev up properly under load same as before, so I disconnected the MAF sensor's electrical connection altogether, and boy!, does the turbo spool-up now, same as it always had before when disconnected, but slightly better now. I may buy a new NAFF..err..MAF sensor and fit it for two reasons. 1. To see if it does improve things. 2. And this is probably more important. I particularly want to pull the old MAF sensor apart and have a look at its electronics, particularly to see if the fine wire mesh is connected electronically to the sensor wires. I strongly suspect that it is, but if it isn't connected then I'll remove it[the mesh, and the sensor wires] altogether and put it back on to see if the increased airflow allows the turbo to churn out some much-needed extra grunt at lower revs. This is always where my Traffic needs the extra grunt[at low revs] because once the turbo's spooled-up, it'll always pull like a train.

If there's a decided improvement with a new MAF sensor[I'll be over the moon somewhere if you're looking for me] I'm still hoping to see if I can repair the old MAF sensor with some el cheapo electronic components. I suspect that the new MAF sensor is going to cost an arm and a leg, just like the $90.00 the mongrels charged me for a new reversing light switch plus whatever it wa$ to fit the bally thing.

Let's hope I'm able to iron out a few gremlin$ to get these engines performing as they should be! 1.9 Trafics forever Down Under! ;^)

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