Diagnostic Trouble Code List Index

Warning light on the dash? Read through our trouble codes lists to find out what the code means and possible causes. From check engine light codes and ABS codes to theft or transmissions.

Engine (PCM) Diagnostic Codes

Full list of engine, PCM diagnostic trouble codes. Find out why that check engine light is on.

AntiLock (ABS) Brake Codes list

List of ABS brake trouble codes and their descriptions in detail.

Transmission Trouble Codes

Transmission trouble codes list to help you diagnose your car or truck.

Airbag (SIR) Codes List

Airbag system codes list meaning and descriptions.

Theft / Security Codes List

Theft deterrent and factory security computer codes.


Onstar codes that may cause your system to not function.

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