Honda 1983-1995 Vehicles OBD1 Codes

For most Honda vehicles between 1990-95 models, you can get the code yourself by using the diagnostic connector located in the passenger side kick panel. All you do is use a jumper wire in the 2 pin service connector. (There is a second connector with a 3 pin use for a scanner).

You can then turn the key on and watch the code being flash in your dash panel check engine light indicator. On some models, a led light is used to flash the code instead and this led light indicator is located in the computer itself.

Shown below is the location of Honda diagnostic connector: When counting the flashes, use 43 as a guide like 4 long flashes followed by 3 short flashes is code 43. Other code that follows is separated by a long pause.

Honda OBD1 Decoder Here are some common Honda OBD1 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 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

After getting your Honda OBD1 codes, reset it first to confirm if you have a temporary or permanent codes. Temporary codes are usually erased whereas permanent (hard) codes need to be fixed before they can be erased. To erase, simply disconnect the battery negative terminal for 1-2 minutes and reconnect. Re-start engine until warmed up and get the code again. If you get the same code after the 2nd scanning, then that is a permanent code.

Note:

Sometime, permanent codes will not show up during a regular warm up period but could sometime takes a day or two of driving before the code shows up. This is true if the defective component is borderline, meaning it could work 50-50 times during operation. And if you check it when it is working half of the time, then the code won't show up.

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