OBD2 Fault Code Lookup

Enter your diagnostic trouble code (DTC) below to find out what's wrong and how to fix it.

What is an OBD2 Code?

OBD2 (On-Board Diagnostics) codes are the car's way of telling you something is wrong. The system monitors the engine, transmission, and emissions systems. When a sensor reports data outside of normal operating limits, a code is stored and the check engine light is usually triggered.

Understanding the Format

Codes follow a standard structure:

Pxxx: Powertrain (Engine/Transmission)
Bxxx: Body (Airbags/Safety)
Cxxx: Chassis (Brakes/Suspension)
Uxxx: Network (Communication)

Professional Insight

While descriptions help, complex timing chain or electronic issues often require OEM-level technical drawings to fix properly. Independent workshops can access this depth of data within the AutoChain Platform.