OBD2 Auto Codes: car faults

Offline OBD2 DTC reference. Look up fault codes, plain explanations & causes.

Auto Codes is an offline reference for OBD-II diagnostic trouble codes (DTC). Over 15,000 codes in your pocket, working without internet.Check Engine light on, or a scanner or mechanic gave you a code you don't understand? Type it in (e.g. P0420, C1234, or U0100) and instantly see a plain-language explanation, likely causes, and the code category.WHEN IT HELPS• The Check Engine light just came on• Your scanner o…