Diagnostic Trouble Codes

A DTC description can be read using the scan tool. Refer to the appropriate Powertrain Diagnostic Procedures for information.

A DTC does not identify which component in a circuit is bad. Thus, a DTC should be treated as a symptom, not as the cause for the problem. In some cases, because of the design of the diagnostic test procedure, a DTC can be the reason for another DTC to be set. Therefore, it is important that the test procedures be followed in sequence, to understand what caused a DTC to be set.