DESCRIPTION:
Aftertreatment Control Module PT-CAN DM1 message not received or has stopped arriving.

MONITORED PARAMETER:
CAN communication

TYPICAL ENABLING CONDITIONS:
Always enabled

MONITOR SEQUENCE:
None

EXECUTION FREQUENCY:
Always enabled

TYPICAL DURATION:
2 seconds

DASH LAMPS:
1. MIL
2. CEL

ENGINE REACTION:
None

VERIFICATION:
Ignition Cycle

NOTE: If any engine computer modules have been programmed recently, it may cause this code to be inactive. Reset the codes, test drive, and see if they come back.

PROBABLE CAUSES:
1. Low battery voltage.
2. Wiring between the MCM 21-pin connector and the battery.
3. Wiring between the MCM 21-pin connector and the CPC #4 connector.