VOLVO
PHM-001C - Hands-free loudspeakers. Signal too high. Intermittent fault
System
Phone Module (PHM)
Volvo models this fault code applies to
Applies to the following models:
2 modelsS80 (1999–2006), V70 (2000–2008)
Show models by year and engine (2)
What does this fault code mean?
The signal to the hands-free loudspeakers is registered as too high, and the fault is intermittent, so it may come and go. While it lasts, the hands-free function does not work, and the instrument cluster shows a message that hands-free mode is not working.
Possible causes
- The signal to the hands-free loudspeakers is too high
What you can do
- 1Check that the connectors at the carphone box and at the keypad unit or carphone control module (PHM) are secure and free from corrosion
- 2Read and note the code, clear it and road test the car to see whether it returns
- 3If it returns, have a workshop with diagnostic equipment check the wiring to the hands-free loudspeakers and correct the fault
Symptoms you may notice2
- The hands-free function does not work
- Message in the instrument cluster that hands-free mode is not working
General guidance for car owners. Diagnosis on the car can point to a different cause.