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.
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
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.