VOLVO
PHM-0005 - Communication with control module. Faulty signal. 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 fault is intermittent, meaning sporadic. The keypad or phone module (PHM) registers that the MBUS signal is at too low a level. The cause is repeated faulty MBUS transmissions between the phone box and the keypad, and the phone then does not work.
Possible causes
- Repeated faulty MBUS transmissions between the phone box and the keypad or phone module (PHM)
What you can do
- 1Read and note the code, clear it and road test the phone to see whether it comes back
- 2Check that the MBUS connectors to the phone box and the keypad are secure and free from oxidation
- 3If the code does not come back, no further action is needed
- 4If it comes back, have a workshop with diagnostic equipment check the phone box and the keypad
Symptoms you may notice2
- The phone does not work
- A message on the instrument panel says that the phone is not working
General guidance for car owners. Diagnosis on the car can point to a different cause.