What does fault code IHU-U001048 mean?

Diagnostic fault code details for IHU-U001048 (Volvo S60 (2011–), Volvo S80 (2007–), Volvo V40 (2013–)). Repair service at OBD Tuning.

VOLVO

IHU-U001048 - Medium Speed CAN Communication Bus. System Internal Failures. Supervision software failure

System

Infotainment Head Unit (IHU)

Volvo models this fault code applies to

Applies to the following models:

9 models

S60 (2011–), S80 (2007–), V40 (2013–), V40 Cross Country (2013–), V60 (2011–), V60 Cross Country (2015–), V70 (2008–), XC60 (2009–), XC70 (2008–)

Show models by year and engine (9)

What does this fault code mean?

The infotainment head unit (IHU) checks its communication with the central electronic module (CEM) over MS-CAN. The code is stored when the monitoring software for that communication has a fault.

Possible causes

An internal software fault in the infotainment head unit (IHU)

What you can do

1Read and clear the code, then check whether it comes back
2Check that the fuses are intact
3If the fault remains, have a workshop check whether the head unit software needs to be downloaded again in its latest version

Symptoms you may notice1

The audio unit does not work at all

General guidance for car owners. Diagnosis on the car can point to a different cause.