VOLVO
AUD-U200398 - Fibre Optic Communication Bus. General Electrical Failures. Component or system over temperature
System
Audio Module (AUD)
Volvo models this fault code applies to
Applies to the following models:
4 modelsS80 (2007–), V70 (2008–), XC60 (2009–), XC70 (2008–)
Show models by year and engine (4)
What does this fault code mean?
The audio control module (AUD) has detected excessive temperature at the transmitter of the fibre-optic data bus (MOST) that carries audio and data between the infotainment units. To protect itself the module shuts down, so the sound cuts out.
Possible causes
- High temperature in the car or around the audio unit, for example after parking in the sun or with blocked ventilation around the unit
- Excessive current draw in the module
- Internal fault in the audio control module (AUD)
What you can do
- 1Check that the audio system fuses are intact
- 2Make sure air can circulate around the audio unit and nothing blocks its ventilation
- 3Note whether the fault only appears when hot – if it clears once the car cools it may be temporary overheating
- 4If it recurs at normal temperatures, have a workshop check or replace the audio module
Symptoms you may notice2
- No sound from the speakers
- The audio system may shut down and restart once it has cooled
What the fault can affect1
- The audio control module switches off
General guidance for car owners. Diagnosis on the car can point to a different cause.