VOLVO
PHM-0008 - Emergency microphone Signal too high
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 phone module (PHM) monitors power to the spare microphone. The spare microphone is used when a Volvo On Call service is connected and the phone module cannot reach the microphone of the audio module (AUD). The code applies to a signal that is too high from the spare microphone.
Possible causes
- The spare microphone is shorted to supply voltage
What you can do
- 1Check the fuses; see the owner's manual for where they are
- 2Test the phone and Volvo On Call with the buttons or a road test to see whether the fault remains
- 3The spare microphone is behind the panel with the SOS and ON CALL switches; look there for chafing or pinching in the wiring
- 4Have a workshop check that the spare microphone wiring is not shorted to supply voltage at the control module
Symptoms you may notice3
- Mobile phone problems
- Volvo On Call problems
- Warning symbol and text message in the display
General guidance for car owners. Diagnosis on the car can point to a different cause.