VOLVO
CPM-3402 - Flame sensor. Signal too low
System
Forbrenningsvarmer (CPM)
Volvo-modeller feilkoden gjelder for
Gjelder følgende modeller:
5 modellerC30 (2007–2013), C30 Electric (2011–2013), C70 (2006–2013), S40 (2004–2013), V50 (2004–2013)
Hva betyr feilkoden?
The combustion preheater module (CPM) has registered a signal from the flame sensor that is too low. The flame sensor checks whether the heater has lit. The cause may be a short to earth in the cable, poor connections or a damaged flame sensor. The heater cannot be activated until the code has been cleared.
Mulige årsaker
- The cable between the CPM and the flame sensor is shorted to earth
- Contact resistance, oxidation or loose connections
- Damaged flame sensor
Hva du kan gjøre
- 1Clear the code and check that it does not return when the heater starts
- 2If you have a diagnostic tool, read whether a flame was detected after a completed heater run; if no flame is detected although the heater has burned, the flame sensor is suspect
- 3Disconnect the connector at the flame sensor and check that the contacts are secure and free from oxidation
- 4Use a multimeter to check that the cable has no contact with earth (the body); if it does, the cable is shorted
- 5If the fault returns, have a workshop replace the flame sensor or check the wiring
Symptomer du kan merke2
- Poor heating in the passenger compartment
- The parking heater does not work
Hva feilen kan påvirke1
- The heater cannot be activated until the fault code has been cleared
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