OBD2 Trouble Code Lookup
Search common OBD-II diagnostic trouble codes (DTCs) by code or keyword to see what they mean and how serious they are.
Frequently asked questions
What is an OBD2 trouble code?
It is a standardized code (like P0420) your car stores when it detects a fault, which a scanner or OBD2 head-up display can read.
Can a head-up display read these codes?
An OBD2 head-up display surfaces live engine data and many trouble codes on your windshield so issues never take you by surprise.