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The Mechatronics of the Volkswagen Dual-Clutch Transmission

Author:

Perrya is a major car enthusiast and loves sharing his extensive vehicular knowledge with his readers.

Many cars, mostly Volkswagens and Audis, have these unique advanced dual-clutch automatic transmissions. They have been around for a few years now and are hailed as an evolutionary step forward from the traditional transmission. People love them or hate them—it all depends on whether you had any problems with them. In 2009, VW recalled 53000 of them for defective mechatronic units.

The mechatronic unit is a computerized control part of the dual clutch system. It is complex and hard to troubleshoot when things go awry. When they do go bad, the dash will flash "PNDRS," and you will basically shut down wherever you are. You may be able to limp home in certain gears, or you may be stranded.

The mechatronics are housed in the gearbox, surrounded by DSG oil. They make up the central control unit. All sensor signals and all signals from other control units come together at this point, and all actions are initiated and monitored from here.

The unit has 12 sensors, By hydraulic means, it controls or regulates eight gear actuators via six pressure modulation valves and five selector valves, and it also controls the pressure and flow of cooling oil from both clutches. Temperatures of -40 °C to +150 °C and mechanical vibrations of up to 33 g occur and need to be dealt with. The oil temperature is kept from rising above 135 °C by an oil cooler. The gears are selected via selector forks in the same way as a manual gearbox. Each selector fork selects two gears. The forks are actuated hydraulically on the direct shift gearbox, not by selector rods.

Many times, the failures begin with sensor temps failing, either failing outright or falling out of specification. Many sensors have backups, so that if the main sensor fails a backup sensor will provide the data to the computer. If the data sent is incorrect, the computer will do what it thinks is right based on that incorrect data; hence, failures result. You may only be able to operate in certain gears or none at all. You may notice grinding or bad fuel economy.

Usually, if a sensor fails, only that section impacted by the sensor is effected. So, if a sensor fails for second gear, you will not be able to use that gear.

Sender G509, a key sensor, can be found in the housing of gearbox input speed sender G182. It measures the temperature of the DSG oil at the outlet of the multi-plate clutches. It operates in a temperature range of –55 °C to +180 °C. If G509 fails, the backup sensors may be able to prevent catastrophic loss. But if they fail, the tranny will go into self-protect mode, and you will be stranded.

If your transmission suddenly starts to shift into odd gears or the car stops, it could be the N92 solenoid valve inside the mechatronics unit which controls activation of all the gears.

Components of the Mechatronic

G93

Gear oil temperature sender

G182

Gearbox input speed sender

G193

Hydraulic pressure sender 1

G194

Hydraulic pressure sender 2

G195

Gearbox output speed sender 1

G196

Gearbox output speed sender 2

G487

Gear actuator travel sensor 1

G488

Gear actuator travel sensor 2

G489

Gear actuator travel sensor 3

G490

Gear actuator travel sensor 4

G501

Speed sender for input shaft 1

G502

Speed sender for input shaft 2

G509

Multi-plate clutch oil temperature sender

G510

Control unit temperature sender

J623

Engine control unit

J329

Terminal 15 voltage supply relay

J519

Onboard supply control unit

J527

Steering column electronics control unit

J587

Selector lever sensors control unit

J743

Direct shift gearbox mechatronics

N88

Solenoid valve 1

N89

Solenoid valve 2

N90

Solenoid valve 3

N91

Solenoid valve 4

N92

Solenoid valve 5

N110

Selector lever lock solenoid

N215

Pressure control valve 1 for automatic gearbox

N216

Pressure control valve 2 for automatic gearbox

N217

Pressure control valve 3 for automatic gearbox

N218

Pressure control valve 4 for automatic gearbox

N233

Pressure control valve 5 for automatic gearbox

N371

Pressure control valve 6 for automatic gearbox.

On vehicle diagnosis, testing and information systems, use VAS 5051, the following modes of operation: Guided fault finding, Guided functions.

VW has made over 1 million DSG transmissions. Most are working fine with no problems, as long as the owner maintains them by changing the fluid every 40,000 miles and properly filling them to the correct level. Costs at garages range from $250-500. The DSG fluid runs $18 per liter, the filter $30. A new mechatronic unit is $4000-5000; a new tranny is far worse.

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.

© 2012 perrya

Comments

perrya (author) on August 27, 2020:

What was the fault? It could be just one of the solenoids that shift gears was failing or got stuck and then did not completely fail yet, which would explain why it seems ok now. Ask was the fault code was, and look up online, you can replace just solenoids in a transmission which is far cheaper.

Nwa Nza on August 26, 2020:

Hi I have a 2016 vw transporter shuttle with only 14k on the mileage.

..Mainly used to ferry my family about....done only about 10k in about 3 years (3k milage when bought as ex-demo :Car is still very new and drives like a dream...

Last week, while just doing 40mph within a shopping centre, there was a loud metallic bang from underneath, my wife siiting in passenger seat with kids even heard it...

...the transporter started behaving oddly...will not move from gear 2 and instead jumped to gear 4...drive was not smooth anymore...

I pulled in to a shopping bay ( near supermaket and called van centre)..

...Cut long story short: on the way home, the car drove again as if nothing happened but I never did more than 40-50 miles for the 35 mile journey as scared it may stop and leave family stranded...

..boooked in to Vancentre for diagnostics and subsequently told a fault in Mechatronics BUT staff could not replicate what happened when they drove vehicle around even though fault showing on the diagnostic computer...

..I am guttered ( my wife says how can a rarely used car ''loose its brains'' and may be there may be more faults ahead)...

..Its really expensive to replace this Mechatronics...should we go ahead and replace it and hope for the best and may be get extended warranty down the line (Ran out of warranty a few months ago) or simply go for a new Car..what could have caused this and how likely to happen again? we were hoping this will serve untill the kids are teenagers at least----for 10 years or so since we only use it when were are all going out as a family.....(I have a smaller car for work)

...Please advise...many thanks

KOLI on August 26, 2020:

Hello PERRYA

I have a 2006 Volkwagen Passat diesel, with a Dsg tiptronic gearbox. When the car starts, it walks 2 km and the gearbox goes into emergency mode, does not take any gear and walks only forward at 40 km per hour.

Computer examination shows: Selenoid 4 pressure valve problem .

Someone told me that the problem is with the electronic package of the gearbox ????

What do you think?

Thank you

perrya (author) on August 17, 2020:

they can replace only the ones needing replaced if the onboard computer indicates that is all

Ishmael on August 17, 2020:

Good day perrya,

Buy looking at the comments youve been giving about selection of gears.. am driving a 2013 vw beetle DSG.. i believe its N92 solenoid.. So i would like to know if they have to replace only kne valve or all the valves

perrya (author) on August 05, 2020:

If you have shifting problems from one gear to another, it could be the solenoid in the megatronic. It is far cheaper to replace the solenoids (there are several) once the engine codes from a scan. Not all engine code scanners get ALL the codes. VW actually has one that is for only their cars and able to get all the codes and worth the hookup fee.

Pranav on August 05, 2020:

Hi Perrya, I recently drove over a curb and have been adviced by the local VW showroom to replace the megatronic since the car wouldn't move in reverse gear. This is a 2016 VW Vento, and while I'm happy that there is a solution, I'm also concerned about the impact the megatronic replacement would have on long term reliability. I've done about 40k km already and was really hoping to get another 50k before I replaced my car. Would you think it would allow me this more mileage, or would you recommend I just flog it off. And buy another car?

santos on August 04, 2020:

my A7 had a grinding noise on 5th gear and a solenoid noise right after 4th gear was engaged

sent the Mechatronics for a rebuild but no changes on the two problems

Zachary on July 16, 2020:

I have a Passat 2012 7 speed DSG. Engine light is on and Scan tool brought "P176E Clutch 2 opens unintentionally". After restarting the car three times, the light disappears but comes back after like 3 days of drive. There is a gear jerk when shifting from gear 2 -3. What could be the problem?

perrya (author) on July 11, 2020:

When a transmission solenoid is malfunctioned, in most cases the problem is not the electrical part of the solenoid; the problem is foreign material obstructing the mechanical function of the solenoid or the flow of the fluid through the transmission valve body.

Change solenoid A

No was Kayombo on July 10, 2020:

Hello! I drive a VW jetta 2006 model, PRNDS is flusing on the dash board, i was able to have it diagnosed and it brought PO7046 error code, changed the gear box oil and tested all the solenoids which seemed be okay but the vehicle is still failing to change gears

Miguel on July 10, 2020:

thanks my friend, I will change the 3 pressure sensors "N371", "N233", "N92"

Regards.

perrya (author) on July 09, 2020:

replace the transmissions pressure sensor

Miguel on July 08, 2020:

hello friend I have the following problem in a 6 speed dsg transmission, "P0868 - TRANSMISSION FLUID PRESSURE LOW" the fault is that the letters blink at the speeds and the car does not walk, the oil is new.

perrya (author) on July 06, 2020:

Continuity checks should always be performed with the power removed from the circuit and the normal readings for wiring and connections should be 0 ohms of resistance unless otherwise specified by the technical data. Resistance or no continuity is an indication of faulty wiring that is open or shorted and must be repaired or replaced.

Read more at: https://www.obd-codes.com/p0771

Replace the solenoid if all else fails. There could be other codes triggered that some OBD readers cannot find unless you use the VW one at dealers

SumTing Wong on July 05, 2020:

Hello,

We have a 2012 GTI with the automatic MK6. Car has started going into "neutral" while doing 30-40mph. throws engine code P0771 : shift solenoid E fault. Which means nothing according to google.

We've changed fluid and filter, no fix. Pulled the front pan, checked all solenoid OHM readings, all within specs. Any help is appreciated.

perrya (author) on June 28, 2020:

If the sensors fail, you need to replace them in any case.

Kris on June 28, 2020:

Hi perrya, do you know if the TPMS fault warning and the Gearbox Malfunction related? Do they both have something to do with the failure of the wheel speed sensors?

perrya (author) on June 27, 2020:

You need to to have VW hook up to their computer to diagnose this. A flashing dash signals something bad. The old sensors may not recognize the part installed, you may need some sort of synchronization using the computer, or maybe the part was not installed as it should be.

Gareth on June 26, 2020:

First and foremost I would like to thank you for this insightful article, great job. I drive a VW Golf 6 TSI, 2 weeks back I got stuck though it was really deep in sand, when I engaged in reverse mode, I managed to pull off. 3 days later, there was unusual sound from the bonet, I consulted different mechanics, and they told me could be the clutch plate that burned inside. I got one mechanic who open the gear box for me, only to find out that the realese bearing was worn out and cracked in pieces. Next step, I was told to buy a new clutch kit, I bought it and after replacing it with the old one, the car could not move at all and there was P and a spanner sign blinking on the dash board. What could be the problem?

perrya (author) on June 19, 2020:

I doubt it, I would only trust a VW mechanic who has done this.

R Ray on June 18, 2020:

Hi, the Mechatronic unit on my Polo has to be replaced, but the VW dealership is charging an arm and a leg! Is there anywhere to buy the genuine unit (new one), and then have it replaced by my own mechanic? Thanks.

perrya (author) on May 29, 2020:

This is serious. Go to VW for diagnostics

perrya (author) on May 29, 2020:

This is a bad sign, go to VW for diagnostics

Tom on May 29, 2020:

Golf R32 PRNDS light flushing.

Aaron gomez on May 07, 2020:

Where is the g182 sensor located on a 2014 jetta gli dsg?

alfon on April 21, 2020:

my fault only P1815 pressure control valve N215 short to plus

perrya (author) on April 20, 2020:

There are several, all of them?

Monique on April 19, 2020:

VW Passat 2.0 turbo diesel flashing rnds. Code on a scanner coming up solenoid a

perrya (author) on April 19, 2020:

VW needs to run a deep diagnostic on the car for the fault codes, from there, you can decide what you want to do. otherwise, your just guessing.

alfon on April 15, 2020:

if it does not ? what another issue sir ?

the mechatronic ?

perrya (author) on April 15, 2020:

If it does not, there is another issue

ALFON on April 15, 2020:

so if i change the solenoid N215, it will solve my problem ?

perrya (author) on April 13, 2020:

I suspect it could be a faulty solenoid that needs replacing since the shifting fails at times, a flashing PRDNS on the dash is a bad sign and usually deals is a faulty mechtronic module on the tranny or the flywheel that needs replacing.

Muneer bani hani on April 12, 2020:

I have tiguan 2011 dsg Q500 seven speed the problem is when car is in driving temperature sometime put D and no driving response then flash on dashboard ,if i put on d1 tiptronic the first gear will engaged without problems then back to normal D with normal driving

alfon on April 05, 2020:

Hi Perrya,

i have VW GTI MK6 2010.. yesterday i got a fault code P1815 N215 Short To Plus.. now my car cant go Reverse , can Go Forward but jerking and PRNDS Blinking...

what it Means ? it Means i need to change the solenoid N215 ?

if i change it with new one , it will solved my problem ?

Tom Raptis on April 01, 2020:

I have a 5-month old Tiguan 162TSI, that has done 15,000 klm.

Currently, it is in with the dealer (2-weeks) as they are trying to diagnose a problem with the transmission. At low speed after I take my foot off the brake and let the car idle at slow speed (0-5kmph) in the traffic, it acts like a bucking horse - like the gears slip, then engage, and so on.

VW have finally agreed to replace the Mechatronic module.

From your experience have you come across a similar problem.

On the freeway at 110kmph the car drives terrific.

Any thoughts would be welcomed.

perrya (author) on March 25, 2020:

I would have them replace all parts and the emachine part, they all work together and if one fails, so will others and you will just have to go back again.

Martha on March 24, 2020:

I have a 2013 Jetta Hybrid and the magatronic has been replaced twice now. Car in the the shop again for the same thing. Brought it in for the recall and car was working fine now 10 days after the updated system my car doesn’t work. EPC light came on and wouldn’t drive more then 20 Kim’s. This time they want to put in a new transmission and magatronic system. The warranty they are offering is only 2 years f unlimited Km on the transmission and magatronic but nothing on the emachine part. The last magatronic system only lasted 18 months, is this normal. Should I insist on them replacing the emachine part as it will not be under warranty as of Sept this year. VW Canada is willing to pay half of this repair but I think this problem has to do with the upgrade they did to the car. Any thoughts

Am samuel w fro Uganda; samuelwalugyo@gmail,com on March 16, 2020:

My VW Passat 1.8 ccs, module 2013, suddenly stopped changing gears, on diagnosing it, it detected mechatronic transmission faulty, what could be the cause, and where do I get the spare parts because I need a full mechatronic system

perrya (author) on March 15, 2020:

I can't help you with Audi

Eben on March 15, 2020:

My 2014 Audi 1.8tfsi sedan gave a "gearbox malfunction no reverse gear continue driving" error.. Audi repaired the mechatronics unit but got a "clutch clearences too small" error after refitting mechatronics. The clutch pack was changed by audi only 15 000km ago? Is it normal for them to only shim and re-align the clutches without t replacing it again? Which makes sense but can you, actually re-align and shim it?

perrya (author) on March 10, 2020:

Sounds like your VW is responsible for this! But a simply oil change should not cause the issues you have.

JH on March 10, 2020:

My 2015 Golf was sent to service one week ago for 90k km servicing, including oil changing. Three days after service, intermittently has engine and gearbox error. On the 6th day after service, consistently occurring engine and gearbox error when on highway. Driving to VW service center and they told me mechatronics problem. Before service, everything was in good condition. Anyone can advise what the possible causes are? Will oil changing caused mechatronics failure? Thank you

ulemu chirembo on March 09, 2020:

my golf tsi 6 when i packed it was failing to get into gears D, P and R was just flusing on the screen. send it to VM garage. they have advised that its the mechatronic problem. want to understand this.

perrya (author) on January 19, 2020:

Did they install the correct one and was it done correctly? did they make adjustments using the VW computer at dealer? was it going in D and R before you took it to dealer? If yes, they are liable. They need to synchronize the transmission with the mechatronic component installed.

rahul khattar from India, mumbai on January 19, 2020:

Hi Perrya,

I have a wierd problem that cannot be captured in the logs.. I have created a video as well

https://www.youtube.com/watch?v=L_N8JSYYoSY

I had put the car in D or R mode and pressed on the accelerator.. The car did not move.. I am not sure on the reason...The service center changed the mechatronic component and now refuse to do anything more... Can you help..

Fabian on January 14, 2020:

The oil leaks from the megatronic. The seal in the compartment to holds the oil is bad

Sandra on January 06, 2020:

Hi Perrya

I have a 2014 1.6 diesel automatic VW Golf. I have recently been experiencing problems with moving up through the gears. When local garage connected to computer gear fault codes were present in the error memory. A full diagnostic check revealed that the problem has been caused by having the wrong mechatronic unit being fitted in the gearbox. The one in my car is meant for a VW Lamando - not a UK VW vehicle. My question is have you ever heard of this issue before. When I took my diagnostic report to the VW garage where I bought the car they said that they had never heard of such a thing before and they would not offer any assistance unless I was willing to commit to spending several hundred pounds for them to investigate it themselves. As you can imagine I am reluctant to do that. The car has only done 22000 miles (I bought it at 2000) and I have not had any work done the gearbox at all. Can you offer any advice please.

perrya (author) on January 06, 2020:

I believe so, there is a link with the car computer that signals with the gearbox

Guraj on January 06, 2020:

Hi, i have a mk 6 tsi (twincharge) running a dsg 7 speed gearbox. The original one had an issue so i decided to replace it. Since then every gearbox that i have fitted in has not worked. What could be the problem? Do i need to replace the mechatronics unit as well ?

Blessings Ndlovu on January 05, 2020:

Hi Perrya , my vw golf 6 1.2 litre had a broken accumulator cup showing error p17bf , we got a new valve box the mechanic fitted it. Changed both oils , mechatronic and tran oil . Car drove back and forth for a minute then i cut it off to clean up . On reversing to take of from the place it was being fixed i realised it could do nothing else but reverse only . The mechanic came and put a machine its now showing p176c error intermittent error gear cannot be selected . Its not showing any gear next the letters D or S on the dash but shows 1 on tiptronic and still wont move forward . Then on stepping on accelerator it ravvs just above 1000 ravs only but on neutral and reverse or park it ravvs as normal .what could be the fault clutch or selenoids or something else ?

perrya (author) on December 25, 2019:

It could be or maybe the solenoids which may be stuck and need to be replaced for shifting

Alin on December 25, 2019:

Hi perrya,

I have the same problem as alfon. Last time i got stuck with my car, it didn't move when i changed from gear to gear. I have a volkswagen tsi 2013 model, with the DSG gearbox. The fork of the gearbox was replaced, and now a few days later my car can't change 1st gear to 2nd. What can it be? Is it the known failure of the mechatronics?

John on November 25, 2019:

I have had the same issue with my 2013 VW Golf. Mechanic has quoted $2900 to replace - $1956 for the Mechatronic unit . Is this reasonable?

perrya (author) on November 22, 2019:

There some shared parts in the Audi, not sure about the dual clutch

bc on November 21, 2019:

i have an Audi A6 allroad 2013 3.0 diesel,

currently at audi with this issue,

it is not under the recall & cost around 4k

Cameron on November 21, 2019:

Do you know if Audi mechatronics are included in this recall? Im considering buying an A6 2013 3.0t, but wont if its going to die on me because of this

perrya (author) on November 13, 2019:

no idea, sorry

perrya (author) on November 07, 2019:

Not knowing Audis, generally shifting issues are usually related to solenoid issues which shift the gears, they can get stuck, defective and usually throw a code on the computer. Sometimes, codes are erased temporaily when the engine is restarted but then immediately are on again when detected fault occurs. If you have not pulled the codes, you should.

Akay777 on November 06, 2019:

Hi Perrya,

Firstly, thanks a lot for such an insightful article. Really appreciate it mate.

I had a question and hoping you would be able to assist. I have Audi a5 with S-tronic transmission. Recently I've been facing issues with the gear box which includes jerky shifts, unable to switch to odd numbered gears and transmission failure warning lights on the dashboard which then disappear after the engine is restarted. I want to know if this problem can be traced back to a faulty pressure accumulator since Audi has recently recalled all the cars with faulty pressure accumulator and if not whats the most likely reason ? Thanks in Advance.

perrya (author) on October 29, 2019:

If the solenoids are mechanical, there would be no fault shown unless it was connected to a sensor.

henry from South africa on October 28, 2019:

thanks perrya, I have rostec vcds and I cant pick any solenoid faulty and what would happen if N215 or N216 is malfunctioned?

perrya (author) on October 28, 2019:

Maybe you need a new mechatronic unit, sounds like a solenoid not engaging to shift

henry from South africa on October 28, 2019:

Hi perrya,

my golf 6 dsg dq250 does engage sometimes but most of the time doesn't. If it does I will run all the gears fine to six and downshift well to gear 3. from 3 to 2 that is where my problem start, it will go to safe mode and wornt engage any more. if I avoid going back to gear 2 it drives normal. I have spare mechatronic, I tried to swap some of the engaging solenoid but problem still the same. I have not change 215, 216, n92,n88, and n218. If I start the car and there is no clicking noise on the gearbox, I will definitely know it wont engage. but if there is sound click definitely it will engage. please advise ...on VCDS I only find p0701. I drained oil and refill oil again still nothing.

perrya (author) on October 01, 2019:

The mechatronic is a very expensive electronic module. You may also need new solenoids

Shoaib on October 01, 2019:

Guess what, I got exactly the same issue with my Golf TDI match 1.6 MK6 - 61 reg. Initially, the car was not going into 5th gear on the day issue occurred. It displays the spanner on the screen and oil light comes up. My Mrs turn the car into semi auto mode and drive on 4th gear to reach home. Next day it just refused to move. I shown to machanic and he said Mechatronic is gone. He quoted me £1800. In which he said £1400 is the price of Mechatronic and he also said that he will replace the clutch. I am so dumb in this car engineering world and not sure what he is charging me is ligit or not.

perrya (author) on September 27, 2019:

yes to have diagnostic test done

Heba elmasri on September 27, 2019:

Hi.i have noticed fault in automatic gearbox symbol And system fault symbol next to km sign should i talk it to qualified work shop is it a serious problem

perrya (author) on September 17, 2019:

Maybe, you need to verify if the solenoid is stuck or if the clutch is bad

alfon gti mk vi on September 16, 2019:

according to your experince my car not mecha problem right ?

only clutch or solenoid right sir ?

Arun kuam on September 15, 2019:

I want N92 solenoid valve....

perrya (author) on September 12, 2019:

Clutch or solenoid that need replacing

alfon on September 11, 2019:

already take it to VW...no fault code...

i hope this is not mecha problem...

shifting so harsh..if clutch worn can make it shifting harsh ?

perrya (author) on August 30, 2019:

Did you take it to VW for scan? Their computer scans deeper than many others that are not VW cars. I know this from experience. I had the same thing but once I took the car to VW, they pulled several codes that my scanner did not.

alfon on August 29, 2019:

hello bro

im already scan my car..no fault code...

is it my clutch worn ? need a new clutch pack ?

perrya (author) on August 28, 2019:

You should take the car into a repair shop and have them get the engine fault codes for your car and find out. Jerking can be caused by bad fuel injectors or other causes

alfon on August 27, 2019:

hi ,

my gti mk6 have a problem...

first problem my car cant basic setting the DSG, then i found the problem, my fork bearing was spoil

then i change a new fork bearing and now can basic setting..

after that 2nd problem after changing new fork bearing, now my car shifting jerking and cant shifting from 1 to 2 by Tiptronic...

why should i do ???

please help

thanks

perrya (author) on August 26, 2019:

If VW there does not inform customers then it is because they want the DSG problems to arise so they get the expensive repair bills. The DSG did have issues with the 2005-2009 models, modifications did occur.

hai, i'm from malaysia. on August 24, 2019:

why VW here never recommend to change the DSG Oil,

"VW has made over 1 million DSG transmissions. Most are working fine with no problems, as long as the owner maintains them by changing the fluid every 40,000 miles and properly filling them to the correct level. Costs at garages range from $250-500. The DSG fluid runs $18 per liter, the filter $30. A new mechatronic unit is $4000-5000; a new tranny is far worse."

perrya (author) on August 19, 2019:

You may have an worn ignition switch or bad fuel pump going out

Bashir on August 19, 2019:

Hi,

My VW passsat 2014 keeps suhtting down while in motion and without any errors indicating on the dash.Once i park,turn it off completely and restart it drives normally a times it goes off at least 2-3 times.

I have been told that i need to replace the mechatronics but i dont feel anything wrong with the way it shifts.

Kindly advise.

Thank You.

perrya (author) on August 15, 2019:

Yes, it could cost that much, The module controls everything.

Frank on August 14, 2019:

Hi Perrya,

My transmission shifted into neutral intermittently. VW dealer quoted a brand new DSG transmission from Germany, installed at $7500 CAD.

Transmission specialist is searching the "electrics" and appears to be the mechatronic module. The mechatronic module costs $1900CAD. Really?

perrya (author) on August 02, 2019:

This sensor results in transmission slips, causing the vehicle to shift suddenly to neutral. If 509 fails, there are two other backup sensors to read the temp of the tranny fluid. What does the car do after a long drive? jerk? not shift?

Daisy on August 01, 2019:

I have 2012 Volkswagen Passat Tdi. My car is drivong odd only when I take it for a long ride and gets hot. Codes that it gave me P 1764, P 2711 and 00564 Elecrical fault intermittent. I was told to replace the cluth temperature sensor G509. Will that take care of the problem of the transmission not getting hot and acting out? It drives like new when car is cold...no issues whatsoever. Also do you have diagram that shows clearly where this sensor G509 is located. Thanks.

perrya (author) on May 31, 2019:

I would never by such a complex part from China due to quality, I know your trying to save money, but for these parts VW should be used, it could cost more in the long run. try putting in NEW accuator rods. If all else fails, you have little choice but to have VW repair it.

Rosepenchus on May 31, 2019:

Hello man,

I saw your site while trying to trouble shoot.

I have a 2010 VW Polo TSI that was imported from Japan.

Recently the gear box just stopped engaging gears both in automatic and when I put it into manual. The sign on the dash would flash depending on the gear you selected, for example, if you put it into Netraul, the 'N' letter would just flash same for drive and reverse, without actually engaging and moving the the car.

The mechanic diagnosed it as a mechatron problem. We ordered another one from China which we installed this past weekend. The part worked for just a few minutes and when we tried to test drive the car, it wouldn't change above the second gear and then eventually wouldn't even move at all and then returned to the original flashing problem.

When we received the Mechatron, it did not have the 'clutch actuator rods' so we used the ones from the old mechatron, could that also be the problem?.

They ran a diagnostics so I have attached the error codes so that you can have a look.

1. P1853 Data-bus powertrain: implausible message from ABS

control

2. P176F Clutch 2 closes Unintentionally

3. P073A Gear 5: Not selectable

4. P1875 Function limitation due to reduction of pressure.

I have contacted the supplier and still waiting for feedback, but a second opinion would help

Please offer a solution if possible.

Litia on May 06, 2019:

Replace hydraulic pump or Mechatronics

Litia on May 06, 2019:

Hi there ,

I've been told that the Hydraulic pump has failed and need a new Mechatronics.

Can the Hydraulic pump be repaired or do I actually require a new Mechatronics

perrya (author) on April 24, 2019:

I guess replace it

Sharke on April 24, 2019:

Just purchased a 2011 VW Jetta after 1 month car just stopped lucky l was in a car park.VW says it’s the mechatronics and we applied for it to be replaced but they rejected that because of age and 138 kms.Been serviced regularly at VW.I want to know what l can do as this is obviously the defect that effected VW cars years ago.

Neld on February 11, 2019:

I parked my car after work and it was functioning well and when I started it in morning the car is not moving. I could see oil leak at gearbox ..what might be the problem? Golf 6 tsi

perrya (author) on January 19, 2019:

That flashing PNRNS is akin to the dreaded blue screen in windows, sometimes, something has really gone wrong with your car. It may be too costly to repair since it is out of warranty.

Tammy on January 18, 2019:

Great article, thanks for the information, I have problem with my Jetta GLI 2008, PNRNS flash, and the car accelerate. So bad VW told me is nothing they can do for me after the warranty is expired.

perrya (author) on January 01, 2019:

Just have them change the sensor and see what happens

I took my 2006 to the Volkswagen dealership on December 31, 2018:

I took my 2006 Volkswagen to the dealership and they told me the meltronics unit however I can go through every gear I took the car there because it has a problem accelerating they want me to change the transmission basically the sensor inside of it better off changing the whole entire transmission with a hundred fifty thousand miles but I don't think acceleration has to do with that transmission nor that it put out any codes directly to the transmission what should I do

Raymond on November 10, 2018:

Do we need to change mechatronic oil? I had change my dsg oil however one of the workshop told me to change mechatronic oil as well

Ea on August 05, 2018:

I changed my megatronics now when I drive and refs go above 2000rpm it falls out of gear from gear 1to 4

Jante on April 10, 2018:

Please where can I buy this. My passat cc 2010 has same problem.

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