About OBD Codes

OBD Codes is a free online resource for looking up OBD-II (On-Board Diagnostics) trouble codes. When your check engine light comes on, our tool helps you understand what the diagnostic trouble code means and what steps to take next.

What is OBD-II?

OBD-II (On-Board Diagnostics II) is a standardized system that monitors your vehicle's engine, emissions, and other systems. When a problem is detected, the system stores a diagnostic trouble code (DTC) and typically illuminates the check engine light on your dashboard.

How to Use This Site

Simply search for your trouble code using the search bar, or browse codes by category. Each code page provides detailed information including common symptoms, likely causes, step-by-step diagnosis procedures, and estimated repair costs.

Disclaimer

The information provided on this site is for educational and informational purposes only. It is not a substitute for professional automotive diagnosis and repair. Always consult a qualified mechanic for accurate diagnosis and safe repairs.