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What is OBD Codes List?

OBD Codes List is a free, no-sign-up OBD-II trouble code lookup covering all 9415 generic SAE J2012 codes plus the most commonly searched manufacturer codes. Every page explains what the code means, what usually causes it, and the order of steps to check and fix it. Written for DIYers with no factory service manual.

How to use this site

1. Read the code. Plug an OBD-II scanner into your car's port. Turn the key on. Note the code.
2. Look it up. Enter the full code or a keyword in the search box on the home page.
3. Diagnose before you spend. Follow the steps. Confirm the fault with live data before replacing parts.

For webmasters

Put a free code lookup on your own site with our embeddable search box, including a make selector covering Ford, Toyota, and Honda.