VOLVO
PHM-6A11 - Handset microphone Signal too low
System
Phone Module (PHM)
Volvo models this fault code applies to
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 carphone control module (PHM) monitors the microphone signal coming from the handset. The code is set when the signal is short-circuited to ground, so the other party cannot hear you when the handset is used. Only hands-free works then, and a warning symbol with a message appears.
Possible causes
- The microphone cable, running from the handset to the control module, is short-circuited to ground
What you can do
- 1Read and note the code before clearing it, so the workshop can see it
- 2Check that the handset connector is firmly seated and free from corrosion
- 3If the connector is in order, have a workshop with diagnostic equipment check the microphone cable for a short to ground
Symptoms you may notice2
- The other party cannot hear when the handset is used
- A text message appears together with a warning symbol
What the fault can affect1
- Only hands-free operates
General guidance for car owners. Diagnosis on the car can point to a different cause.