Diagnostic Trouble Code (DTC) Information

Diagnostic trouble code (DTC) information CEM-5F4F

Condition




The central electronic module (CEM) checks the function and status parking heater.
During activation, the heater tries to start. If the heater does not start, it will try again a few times.
The diagnostic trouble code (DTC) is stored if the central electronic module (CEM) receives a signal from the heater indicating that it has tried to start but failed.
The diagnostic trouble code (DTC) can be diagnosed when the heater is activated.

Substitute value
- The heater is not activated.

Possible source
- Fault in the fuel supply to the parking heater
- Flame sensor clogged with soot
- Blocked combustion air intake
- Contact resistance in the control module connectors
- Open-circuit or short-circuit to supply voltage in the control signal cable for the flame sensor
- Flame sensor not functioning.
- Fault in the power supply for the parking heater

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