VOLVO
PHM-0003 - Communication with control module. 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 phone module (PHM) has received too high a signal in its communication with the control module. The fault is intermittent, meaning it is sporadic, and it may still be present or gone when you check the car. No specific cause is given for this code, so start with the connectors and wiring below.
Possible causes
- No specific cause is given for this code
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
- 3Check the wiring to the phone for chafing and breaks
- 4If the connectors and wiring are sound, have a workshop with diagnostic equipment check the phone module
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.