Powertrain Management (CNG)

DTC P0601-P0607, P1600, P1621, P1627, P1680, P1681, or P1683

Description

This diagnostic applies to internal microprocessor integrity conditions within the control module. This diagnostic also addresses if the control module is not programmed. The following DTCs are diagnosed in this DTC table:

* DTC P0601
* DTC P0602
* DTC P0603
* DTC P0605
* DTC P0606



Test Description

The number below refers to the step number on the diagnostic table.
2. A DTC P0602 indicates the alternative fuels ECM is not programmed.