VOLVO
IHU-U019800 - Lost Communication With Phone Module (PHM). General Failure Information. No sub type information
System
Infotainment Head Unit (IHU)
Volvo models this fault code applies to
Applies to the following models:
9 modelsS60 (2011–), S80 (2007–), V40 (2013–), V40 Cross Country (2013–), V60 (2011–), V60 Cross Country (2015–), V70 (2008–), XC60 (2009–), XC70 (2008–)
What does this fault code mean?
The infotainment head unit (IHU) monitors communication with the phone control module (PHM). The code is stored when that communication is faulty, which means the mobile phone functions and Volvo On Call do not work.
Possible causes
- An internal fault in the phone control module (PHM)
- The phone control module (PHM) is missing
- A blown or damaged fuse
- A break in the MOST wire
What you can do
- 1Read and clear the code, then check whether it comes back
- 2Check that the fuses are intact
- 3If a fault code IHU-U1A2400 is present in the head unit, start the fault tracing with it
- 4If the fault remains, have a workshop trace the phone control module and the MOST wire further
Symptoms you may notice2
- The mobile phone does not work
- Volvo On Call does not work
General guidance for car owners. Diagnosis on the car can point to a different cause.