Diagnostic Trouble Code Descriptions
Diagnostic Trouble Code (DTC) Type DefinitionsEmission Related DTC
Action Taken When the DTC Sets - Type A
- ^ The ECM illuminates the malfunction indicator lamp (M IL) when the diagnostic runs and fails.
- ^ The ECM records the operating conditions at the time the diagnostic fails. The ECM stores this information in the Freeze Frame! Failure Records.
Action Taken When the DTC Sets - Type B
- ^ The ECM illuminates the MIL on the second consecutive driving cycle when the diagnostic runs and fails.
- ^ The ECM records the operating conditions at the time the diagnostic fails. The first time the diagnostic fails the ECM stores this information in the Failure Records. If the diagnostic reports a failure on the second consecutive driving cycle the ECM records the operating conditions at the time of failure and stores this information in the Freeze Frame and updates the Failure Records.
Conditions for Clearing the MIL/DTC - Type A or Type B
- ^ The ECM turns OFF the MIL after 3 consecutive driving cycles when the diagnostic runs and does not fail.
- ^ A current DTC clears when the diagnostic runs and passes.
- ^ A history DTC clears after 40 consecutive warm-up cycles if no failures are reported after the ECM turns OFF the MIL.
- ^ Use a scan tool to clear the MIL and the DTC.
Non-Emissions Related DTCs
Action Taken When the DTC Sets - Type C
- ^ The ECM illuminates the Service Vehicle Soon (SVS) lamp when the diagnostic runs and fails.
- ^ The ECM records the operating conditions at the time the diagnostic fails. The ECM stores this information in the Failure Records.
Conditions for Clearing the SVS Lamp/DTC - Type C
- ^ A current DTC clears when the diagnostic runs and passes.
- ^ A history DTC clears after 40 consecutive warm-up cycles if no failures are reported after the ECM turns OFF the SVS lamp.
- ^ Use a scan tool to clear the SVS lamp and the DTC.
Action Taken When the DTC Sets - Type D
^ The ECM will not illuminate the MIL or SVS lamp.
^ The ECM records the operating conditions at the time the diagnostic fails. The ECM stores this information in the Failure Records.
Conditions for Clearing the DTC - Type D
^ A current DTC clears when the diagnostic runs and passes.
^ A history DTC clears after 40 consecutive warm-up cycles if no failures are reported.
^ Use a scan tool to clear the DTC.
