VOLVO
PHM-0009 - Hands-free microphone. Signal too high. Intermittent fault (EU/OS)
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:
4 modelsS60 (2001–2009), S80 (1999–2006), V70 (2000–2008), V70 XC / XC70 (2001–2007)
Show models by year and engine (4)
What does this fault code mean?
The fault is intermittent, meaning sporadic, and applies to cars with the EU/OS version. The phone module (PHM) detects that the hands-free microphone signal has contact with supply voltage, and hands-free mode then does not work.
Possible causes
- The wiring to the hands-free microphone has a short to supply voltage
What you can do
- 1Clear the code and road test the car to see whether it comes back
- 2With the ignition off, check the connectors where the hands-free microphone plugs in; they should be secure
- 3Connector position depends on build date: before 27 August 2001 they are in the left A-pillar and the roof, later in the right A-pillar
- 4Look for chafing or pinching on the wire from the hands-free microphone, since damaged wiring can touch a live supply
- 5If you find no fault in the wire, you can try replacing the hands-free microphone
Symptoms you may notice2
- Hands-free mode does not work
- Message in the text display, for cars with Volvo On Call
What the fault can affect1
- Only the handset works
General guidance for car owners. Diagnosis on the car can point to a different cause.