CPM is Combustion Preheater Module
OP: Are you getting a code? CPM-B1D3468 would be the code for a lock out and has many google results.
https://www.dtcdecode.com/Volvo/CPM-B1D3468
I went down the rabbit hole with that DTC and it's full of other language forum threads. You need to reflash the eeprom of the webasto and it works, since there appears to be a 800h limit (counter)
https://mhhauto.com/Thread-Webasto-Top-V...rs-counter
OP: Are you getting a code? CPM-B1D3468 would be the code for a lock out and has many google results.
https://www.dtcdecode.com/Volvo/CPM-B1D3468
I went down the rabbit hole with that DTC and it's full of other language forum threads. You need to reflash the eeprom of the webasto and it works, since there appears to be a 800h limit (counter)
https://mhhauto.com/Thread-Webasto-Top-V...rs-counter