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 …

Get definitions and auto repair information for thousands of OBD-II codes. Look up B, C, U and P codes to diagnose your car problem.

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 - …

Jan 6, 2026 · Last post Similar OBD codes from differ… by omycar Mon May 13, 2024 8:49 pm General Car Repair Forum Please use the manufacturer specific forums above this where …

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 …

Information on methods to reset the check engine light or OBD-II codes.

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 …

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; …

P01xx OBD-II Trouble Codes search forums P00xx P01xx P02xx P03xx P04xx P05xx P06xx P07xx P08xx P09xx P0Axx P0Bxx P0Cxx P1*** P20xx P21xx P22xx P23xx P24xx P25xx …