parking heater CCM-B15B693

[nshekhan]

Hi, thank you for replying.
I have a 2017 Volvo XC90 T8 and I am getting the fault code CCM-B15B693 related to the Combustion Preheater Module (parking heater). The parking heater does not start.
Using  Orbit I can see the CPM module and it appears that the heater is locked. I tried to unlock/reset it, but the heater still does not start.
I also checked under the car trying to locate the auxiliary heater fuel dosing pump, but I could not find it. I am not sure if the car actually has the fuel heater installed or if it only has the electric heater system.
Has anyone experienced this fault code before or knows the correct procedure to unlock the parking heater using  Orbit on a 2017 XC90 T8?

[nshekhan]

hello,
volvo xc90 T8 2017
Fault code: CCM B15B693 (Combustion Preheater Module – no operation)
Fix: I replaced the combustion chamber (burner) inside the heater (CPM).
After that, the heater works normally and the error is gone.
So the problem was inside the heater, not wiring.
Hope this helps.