Does the check engine light bother you, and you’re just curious about reading the Honda OBD1 codes?
Look no further!
In this post, we have compiled a clear and concise list of Honda OBD1 codes to help you diagnose any issues with your car quickly. We also tell you how to read and erase trouble codes in your Honda model.
But that’s not all – This codes list is totally FREE to download.
So, let’s begin!
Honda OBD1 Codes List and Definition [FULL]
Free Download: Full Honda OBD1 Trouble Codes List and Meaning PDF
Note: Use the search box in the table below to quickly find the specific code you’re looking for.
| Code | Meaning |
|---|---|
| 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 90 | Evaporative Emission Control System Leak Detected (EVAP) |
| Code 91 | Fuel Tank Pressure Circuit |
| Code 92 | Evaporative emission control system |
Honda OBD1 Connector Location
Honda OBD1 plug is found on the passenger side beneath the glove box. The plug has a blue plastic casing and houses two connectors. One of the connectors is more extensive and has 3 double pins, whereas the other has 2 double pins. The connector to use is the 2 double pins.
Credit: honda6.ipbhost.com
How to Pull Honda OBD1 Codes Without a Scanner
Firstly, before embarking on the journey to read the OBD1 codes, you’ll need the following items: a paper, pen, and unrolled paper clip.
Here is how to go about the self-diagnostic test:
- Fold the unrolled paper clip into a U or V shape and insert its ends on the 2 double pin connector. It should form a loop between the right and left pins.
- Turn the key through 2 clicks to start the ignition without cranking the engine.
- Next, fix your eyes on the instrument cluster, taking a keen interest in the check engine light.
- Count the number of flashes to identify the error code.
You should note that long flashes represent the first digit in a two-digit code. For example, two long flashes would indicate number two as the first digit of the two-digit code. The second digit of the code is identified through short flashes.
Single-digit codes are interpreted by counting short interval flashes. For multiple trouble codes, the signal to the consecutive trouble code is a much longer pause between the two codes.
- Record the error codes using a pen and paper.
- Finally, you can look up the trouble codes in the section down below, or you can Google them up on Honda’s website.
How to Clear a Honda OBD1 Code
After fixing the faulty component or sensors, you need not be frustrated or distracted by the flashing check engine light. Here are some of the ways that you could use to eliminate the error codes:
1. Disconnecting the negative battery terminal
Disconnect the negative battery terminal for 10 to 15 seconds, then reconnect it to resets the ECU. This action eliminates the trouble codes. However, this method suffers several drawbacks, including rough driving for about 50 miles before the ECU relearn its values. Secondly, you’ll need to reconfigure your radio stations, as radio codes are lost during the reset.
2. Pulling out the ACG or alternator sense fuse
This is a much safer reset method, and you won’t have to reconfigure your radio stations once it’s done. Here is how to go about it:
- Identify the fuse compartment located near the driver side kick panel.
- Uncover the fuse box and locate the number used to represent the ACG or the alternator sensor fuse. This information is indicated beneath the circuit schematic attached under the fuse box cover.
- Locate the fuse and dislodge it before reinserting it.
This will reset the ECU. You can crank up the engine and let it idle for about 10 minutes for the ECU to relearn its values, or you could take the vehicle on a short drive.
Final Thoughts
I hope that our Honda OBD1 codes post has been a valuable guide for diagnosing and fixing any issues with your Honda vehicle. By understanding what your car says through the OBD1 code and understanding how to interpret them, you can keep your vehicle running smoothly for years to come.
If you have any questions or comments about our Honda OBD1 codes list, we would love to hear from you. Feel free to comment below and share your experiences troubleshooting your Honda vehicle.
And if you’re finding the proper scan tool for your vintage Honda, check out our post about the best OBD1 scanners in 2023.
Thanks for reading our post!
References:
- OBD1 Trouble Codes for Honda CRX/EF/Civic 1988-1991, Honda-tech.com
- MIL (Flash) Trouble Codes Honda, Alflash.narod.ru
