Error OBD2 codes demystified.

OBD-II diagnostic trouble codes (DTCs) are standardized fault codes stored when your car's onboard computer detects a problem. A check engine light usually means a powertrain (P) code is present; body (B), chassis (C), and network (U) codes cover other systems. Look up your code below or browse the full list to see what it means, common causes, and how to fix it.