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Honda and Acura OBD1 "Check Engine Light" Trouble Codes (1992-1995)

The Dreaded "Check Engine" Light

In every car's life, there comes a time when the dreaded "check engine" light appears. Not to fear. There are many resources you can use to check and diagnose these DTCs (diagnostic trouble codes).

For 1992-1995 (OBD1) vehicles you can check these yourself by using the method shown in the picture below.

Location of OBD1 Honda Diagnostic Connector


How to Read the Code

In OBD1 Hondas and Acuras there is a diagnostic port and a two-pin connector located under the passenger-side dashboard. When checking the DTCs you will need to insert a jumper wire from one pin to the other in the two-pin connector. If you don't have a piece of wire around, it is also common to see people using paperclips to "jump" the two sides of the connector.

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Once you have "jumped" the two-pin connector, you now need to insert the key and turn on the vehicle. Your check engine light will then start to flash. Every long flash is a digit in the "tens" place in the code, and a short flash is a digit in the "ones" place. So, if you see two long flashes and five short flashes, you have a Code 25. There will be a long pause between codes. Read all the codes until they start to repeat themselves. Then refer to the table below to get the meaning of each code.

For 1996 and Newer Vehicles

For 1996 and newer (OBD2) vehicles, you can visit a local auto parts supplier, such as Advance Auto Parts, that offers free vehicle diagnostics. Most of these free services are restricted to OBD2 vehicles and will give you an immediate explanation of what the code is. As always, it's a good idea to write these codes down and do a little search online to see what other owners have run into when receiving the same codes.

The Most Common Honda and Acura OBD1 Codes


Codes 0 and 11

Electronic control module (ECM)

Code 1

Heated oxygen sensor A

Code 2

Oxygen content B

Codes 3 and 5

Manifold absolute pressure

Code 4

Crank position sensor

Code 6

Engine coolant temperature

Code 7

Throttle position sensor

Code 8

Top dead center sensor

Code 9

No.1 cylinder position sensor

Code 10

Intake air temperature sensor

Code 12

Exhaust recirculation system

Code 13

Barometric pressure sensor

Code 14

Idle air control valve or bad ECM

Code 15

Ignition output signal

Code 16

Fuel Injector

Code 17

Vehicle speed sensor

Code 19

A/T lock-up control solenoid

Code 20

Electric load detector

Code 21

V-TEC control solenoid

Code 22

V-TEC pressure solenoid

Code 23

Knock sensor

Code 30

A/T FI signal A

Code 30

A/T FI signal B

Code 41

Heated oxygen sensor heater

Code 43

Fuel supply system

Code 45

Fuel supply metering

Code 48

Heated oxygen sensor

Code 61

Front heated oxygen sensor

Code 63

Rear heated oxygen sensor

Code 65

Rear heated oxygen sensor heater

Code 67

Catalytic converter system

Code 70

Automatic transaxle

Code 71

Misfire detected cylinder 1

Code 72

Misfire detected cylinder 2

Code 73

Misfire detected cylinder 3

Code 74

Misfire detected cylinder 4

Code 75

Misfire detected cylinder 5

Code 76

Misfire detected cylinder 6

Code 80

Exhaust recirculation system

Code 86

Coolant temperature

Code 92

Evaporative emission control system

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.

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