Diagnostic Trouble Code (DTC) Information CPM-5301

Condition 

Fig 1: Identifying Combustion Preheater Module (CPM)

Courtesy of VOLVO CARS CORPORATION

The diagnostic trouble code (DTC) is stored if the combustion preheater module (CPM) has registered that the heater has overheated more than 10 consecutive times.

The diagnostic trouble code (DTC) can be diagnosed when the ignition is switched on.

Substitute Value 

• None.

Possible Source 

• Damaged engine coolant temperature (ECT) sensor
• Damaged overheat protection thermostat
• Air or leakage in the cooling system
• Damaged water pump.

Fault symptom[s] 

• The parking heater does not operate.