VOLVO
CPM-4101 - Engine coolant heater. Too many unsuccessful attempts
System
Combustion Pre-heater Module (CPM)
Volvo models this fault code applies to
Applies to the following models:
5 modelsC30 (2007–2013), C30 Electric (2011–2013), C70 (2006–2013), S40 (2004–2013), V50 (2004–2013)
What does this fault code mean?
Fault code CPM-4001 has occurred several times in a row, and this code is then set. The heater cannot be started until this code has been cleared. The causes are the same as for CPM-4001: a clogged fuel filter, a damaged flame sensor or a damaged heater.
Possible causes
- Damaged flame sensor
- Clogged fuel filter
- Damaged heater
What you can do
- 1Fix the underlying fault code CPM-4001 first, then clear this code
- 2Check that the tank has enough fuel and that the battery is in good condition
- 3If you have a diagnostic tool, read the fuel level and battery voltage and compare them with the permitted range for starting
- 4Look for damaged or pinched fuel lines to the heater; fuel line work should be done by a workshop because of the risk of fuel spill
- 5If the fault returns after repair, have a workshop check the fuel filter, the flame sensor and the combustion air flow
Symptoms you may notice1
- The parking heater does not work
What the fault can affect1
- The heater cannot be started until the fault code has been cleared
General guidance for car owners. Diagnosis on the car can point to a different cause.