Diagnostic Trouble Code (DTC) Information

Diagnostic trouble code (DTC) information CEM-5F3E

Condition




The central electronic module (CEM) checks the communication with the combustion preheater module (CPM).
The diagnostic trouble code (DTC) is stored if the central electronic module (CEM) registers that the combustion fan is running too slowly.
The diagnostic trouble code (DTC) can be diagnosed when the heater is activated.

Substitute value
- None.

Possible source
- Damaged combustion fan.
- Contact resistance in the control module or the combustion fan connectors

Fault symptom[s]
- Poor heating in the passenger compartment.