Diagnostic Trouble Code (DTC) Information CPM-U300043

Condition

The combustion preheater module (CPM) checks its internal circuits.

The diagnostic trouble code (DTC) is stored if the control module detects that:

An internal fault has occurred.

The control module's test for the diagnostic trouble code (DTC) starts in the event of:

Heater started.

NOTE:

The control module can only detect the fault once the test has been started and the diagnostic trouble code (DTC) is stored when the conditions are met.

Fig 1: Booster Heater

Courtesy of VOLVO CARS CORPORATION

Substitute Value

Heater's function blocked.

Possible Source

Damaged combustion preheater module (CPM).

Fault symptom[s]

Poor heating in compartment
Parking heater does not operate