VOLVO
PHM-0030 - Reserv battery Voltage too low
System
Phone Module (PHM)
Volvo models this fault code applies to
This fault code has different meanings depending on model, model year or engine. Select the meaning that applies to your car.
Applies to the following models:
6 modelsC30 (2007–2013), C30 Electric (2011–2013), C70 (2006–2013), S40 (2004–2013), V50 (2004–2013), XC90 (2003–)
What does this fault code mean?
The internal reserve battery in the carphone control module has too low a capacity. The control module checks the reserve system, which covers the battery, antenna, mic, loudspeaker and SIM reader, and the code is set when capacity is too low. Volvo On Call stops working, and a message with a warning symbol appears.
Possible causes
- The internal reserve battery has too low a capacity
What you can do
- 1Check that the fuses for the telephone system are intact
- 2Road test the car and check that Volvo On Call and the telephone work
- 3If you have a diagnostic tool, read the code and note it before clearing it
- 4If it returns, have a workshop with diagnostic equipment check the reserve system in the carphone control module and correct the fault
Symptoms you may notice2
- Volvo On Call does not work
- Message in the text display with a warning symbol
General guidance for car owners. Diagnosis on the car can point to a different cause.