Honda 95 & Earlier OBD1 Trouble Code Info

It’s the weekend, you’re out enjoying the open road, and WHAM, your “Check Engine” light rears it’s ugly head. Now you are wondering what is wrong with the engine? All you need is some OBD1 Trouble Code Info.

Not have enough money to take it to your mechanic and let him decipher the fault ? Well here’s how you can learn what you’re Electronic Control Unit (ECU) is trying to tell you.

Like the code machines of old, the ECU loves to talk in code. The only problem is deciphering it.

Fortunately, you have this article to help you interpret it.

The ’86-’91 Honda and ’86-’93 Acura were equipped with a window on the ECU. On the other side of this window is an LED. This little LED would flash the code when the key was in the ON position. But unfortunately, the ’92-’00 Honda and ’94-’00 ECU was upgraded without an access window or LED. Now replacing the LED  is a flashing check engine light. All that you need now is to pull the trouble codes, and you can do it with a jumper wire. ( Paper Clip )

Locate the factory diagnostic plug next to the ECU for the Integra and Civic. You’ll find this plug in the passenger side foot well underneath the far right hand side of the glove box.

Honda Paper Clip Trick
Honda Paper Clip Trick
OBD1 Connector
OBD1 Connector

There is a two-pin connector that contains a brown and black wire. Jump these two wires together and turn your key to the ON position.

Here is where it gets tricky learning to read your, Honda 95 & Earlier OBD1 Trouble Code Info.

Deciphering the code requires reading the light sequences. When the car is in the ON position, the check engine light emits two different flashes; a long extended flash means 10, and a rapid flash means 1.

So, one long flash, another long flash, followed by 3 quick flash stands for……………….23!

Equipped with that information, here are the codes for the ’92-’00 Honda and ’94-’00 Acura.

OBD1 Trouble Codes:

Code 0 and 11 Electronic Control Module (ECM)

Code1 Heated oxygen sensor A

Code 2 Oxygen content B

Code 3 and 5 Manifold Absolute Pressure

Code 4 Crank position sensor

Code 5 Map 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 TCM Signal A

Code 31 TCM Signal B

Code 41 Heated oxygen sensor heater

Code 43 Fuel supply system

Code 45 Fuel supply metering

Code 48 Heated oxygen sensor

Code 54 Crankshaft Speed Fluctuation Sensor

Code 61  Primary Front heated oxygen sensor

Code 63  Secondary 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 90 Evaporative Emission Control System Leak Detected

Code 91 Fuel Tank Pressure Circuit

Code 92 Evaporative emission control system

Clearing Codes

Disconnect the negative battery cable for at least 10 seconds to clear codes.

Learning to read your, Honda 95 & Earlier OBD1 Trouble Code Info is an important first step to get you headed in the right direction.

Disclaimer: We cannot guarantee the accuracy of all trouble codes.We try and make them as accurate as we can, but sometimes we all make mistakes. Warning: Please check for manufacturer specific codes with an appropriate manual.


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