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 …

Explore our complete 2024 guide to OBD-II trouble codes, including P, B, C, and U codes. Diagnose your vehicle's issues effectively's expert insights.

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 read the codes 1. Ground terminals A and B (see diagram below) with the ignition "ON" and engine not running. The system will enter the diagnostic mode. In this mode, the computer …

Search OBD-Codes.com We have literally hundreds of trouble code articles and thousands of discussions in the forums. This search here is the best way to search all of our content to get …

Engine codes P0135 (HO2S Performance Bank 1 Sensor 1) and P0030 (HO2S Heater circuit Bank 1 Sensor 1). I replaced the upstream oxygen sensor (bank 1 sensor 1) with an NGK …

Codes vs Onboard message; Onboard Messages: Reduced engine power, Service Traction control, I get no codes Codes: P0223 Throttle Position (TP) Sensor 2 Circuit High Voltage; …

Information on diagnosing and repairing a vehicle DTC trouble code P0446 which is EVAP emission control system incorrect purge flow.

P0305 Cylinder #5 Misfire Technical Description Cylinder #5 Misfire Detected What does that mean? This diagnostic trouble code (DTC) is a generic powertrain code, which means that it …