Honda Civic owners may encounter various issues indicated by OBD2 (On-Board Diagnostics) codes. Understanding these codes is crucial for diagnosing and resolving problems effectively. This comprehensive list provides Honda Civic Obd2 Codes and their corresponding descriptions, sourced from Honda Service Bulletin #03-020.
Common Honda Civic OBD2 Codes
Several OBD2 codes frequently appear in Honda Civics. These include:
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P0171/P0172/P0174/P0175: These codes relate to the fuel system, indicating a lean or rich condition. A faulty oxygen sensor, mass airflow sensor (MAF), or fuel injector could trigger these codes. Alt: Image of a Mass Air Flow sensor (MAF) which is often the culprit for P0171/P0172/P0174/P0175 codes.
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P0420/P0430: These codes signal a problem with the catalytic converter system efficiency. A failing catalytic converter, oxygen sensor issues, or exhaust leaks can cause these codes.
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P0300-P0306: These codes represent misfires in specific cylinders (P0301 for cylinder 1, P0302 for cylinder 2, and so on). Spark plugs, ignition coils, fuel injectors, or low compression can contribute to misfires. Alt: Image of spark plugs, which if faulty, can cause P0300-P0306 misfire codes.
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P0131/P0135/P0137/P0141: These codes point to issues with the oxygen sensors (O2 sensors), specifically low voltage, heater circuit malfunctions, or slow response. Faulty O2 sensors, wiring problems, or a failing heater circuit can cause these codes.
Comprehensive Honda Civic OBD2 Code List
The following table lists a wider range of Honda Civic OBD2 codes:
| Code | Description |
|---|---|
| P0010/P0011 | Variable Valve Timing (VVT) System Malfunction |
| P0101-P0103 | Mass Airflow (MAF) Sensor Problems |
| P0106-P0108 | Manifold Absolute Pressure (MAP) Sensor Problems |
| P0111-P0113 | Intake Air Temperature (IAT) Sensor Problems |
| P0116-P0118 | Engine Coolant Temperature (ECT) Sensor Problems |
| P0122/P0123 | Throttle Position (TP) Sensor Problems |
| P0125/P0128 | Cooling System Malfunctions |
| … | … |
(Note: This is not an exhaustive list. Consult a repair manual or OBD2 code reader for a complete list of codes and their definitions.) Many more codes pertaining to various systems like the transmission (P0700-P0986), emissions (P0401-P0499, P1410-P1498, P2413, P2422), and engine management (P0500-P0685, P1020-P1390) are also possible.
Conclusion
This comprehensive list of Honda Civic OBD2 codes provides a starting point for diagnosing car problems. While this information is helpful, it’s crucial to use a reliable OBD2 scanner to retrieve the specific codes from your vehicle. Further diagnosis may be necessary to pinpoint the exact cause of the issue. Consulting a qualified mechanic is recommended for complex problems or if you are unsure about performing repairs yourself.
