Decode your check-engine light.

Enter your OBD-II trouble code for a plain-English explanation, how urgent it is, the most likely causes, and a typical repair cost range.

Educational information only — generated to help you understand your vehicle, not a substitute for a hands-on diagnosis by a qualified technician. A single code can have multiple causes; confirm with a proper inspection before paying for parts. Cost ranges are rough U.S. averages and vary by vehicle, region, and parts choice.