VOLVO
PHM-U210909 - Back-up battery. General Failure Information. Component Failures
System
Phone Module (PHM)
Volvo models this fault code applies to
Applies to the following models:
9 modelsS60 (2011–), S80 (2007–), V40 (2013–), V40 Cross Country (2013–), V60 (2011–), V60 Cross Country (2015–), V70 (2008–), XC60 (2009–), XC70 (2008–)
What does this fault code mean?
The telephone module (PHM) has its own back-up battery, which is used when Volvo On Call is connected and the telephone module gets no supply from the main battery. The fault is stored when the back-up battery is damaged, has too low capacity or is not connected. Volvo On Call can then stop working.
Possible causes
- The internal back-up battery is damaged
- The back-up battery has too low capacity
- The internal back-up battery is not connected to the telephone module (PHM)
What you can do
- 1Check that the internal back-up battery for Volvo On Call is properly connected to the telephone module
- 2Look for loose or corroded connectors at the back-up battery
- 3If needed, a workshop will replace the internal back-up battery in the telephone module
Symptoms you may notice2
- Volvo On Call has no function or reduced function
- Text window and warning symbol with a text message
General guidance for car owners. Diagnosis on the car can point to a different cause.