Diagnostic Trouble Codes

Each diagnostic trouble code is diagnosed by following a specific testing procedure. The diagnostic test procedures contain step-by-step instructions for determining the cause of trouble codes as well as no trouble code problems. It is not necessary to perform all of the tests in this article to diagnose an individual code.

Always begin by reading the diagnostic trouble codes using DRB. This procedure begins in DTC TEST - Checking System for Diagnostic Trouble Codes. This will direct you to the specific test(s) that must be performed.