Diagnostic Trouble Code (DTC) Information CPM-5101
Condition
The diagnostic trouble code (DTC) is stored if the combustion preheater module (CPM) registers that the temperature in the heater exceeds the permitted value. The heater cannot be activated until the diagnostic trouble code (DTC) has been erased.
The diagnostic trouble code (DTC) can only be diagnosed when the combustion preheater module (CPM) is activated.
Substitute Value
- None.
Possible Source
- Damaged overheat protection thermostat
- Damaged engine coolant temperature (ECT) sensor
- Air or leakage in the cooling system
- Damaged water pump.
Fault symptom[s]
- Poor heating in the passenger compartment
- The parking heater does not operate.