A car repair resource site that helps you diagnose vehicle OBD, OBD-II, and OBD2 problems. We have many articles on how to diagnose and repair many check engine light codes.

OBD-II (Check Engine Light) Trouble Codes Welcome to OBD-Codes.com, your headquarters for everything OBD-II related. For more information on what OBD codes are, OBD-II codes …

FAQ: OBD2 Codes Explained OBD-II codes consist of a number of parts. Here is a sample OBD2 code: P0171 Here is a breakdown of what each digit of the code means: First Character - …

How to quickly diagnose, repair, and info on symptoms and causes of a P0100 MAF mass airflow code which indicates a circuit malfunction.

P0300 Random Misfire Detected Code Technical Description Random/Multiple Cylinder Misfire Detected What does that mean? This diagnostic trouble code (DTC) is a generic powertrain …

P0108 - MAP Pressure Circuit High Input OBD-II Trouble Code Technical Description Manifold Absolute Pressure/Barometric Pressure Circuit High Input What does that mean? This …

Information on diagnosing and repairing a DTC trouble code P0401 which is insufficient EGR (exhaust gas recirculation) flow.

P0420 Catalyst System Efficiency Below Threshold Technical Description Catalyst System Efficiency Below Threshold (Bank 1) What does that mean? This diagnostic trouble code …

P0606 PCM / ECM Processor Fault OBD-II DTC Technical Description PCM / ECM Processor Fault What does that mean? This diagnostic trouble code (DTC) is a generic powertrain code, …

How to quickly diagnose, repair, and info on symptoms and causes of a P0102 MAF mass airflow code which indicates a low condition in the MAF circuit.