Factory tables for 60 makes: some read by the J1939 standard, others use their own dealer format. Pick a make or type a code on the homepage.
For these makes the code follows the standard: a component number plus a fault type.
These makes number faults their own way, outside the J1939 standard. Look up a code in the search on the homepage.
Know the code number? Type it into the search — or paste the whole list from the scanner and we will show which fault is the real one.