VOLVO
SUB-0004 - Control module. Internal fault
System
Subwoofer Module (SUB)
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:
3 modelsS40 (2004–2013), V50 (2004–2013), XC90 (2003–)
Show models by year and engine (3)
What does this fault code mean?
An internal fault has been recorded in the subwoofer module (SUB), and at the same time a signal on the wire to voice coil 1 in the bass speaker that is either too high or too low.
Possible causes
- Short circuit to supply voltage in the signal wire between the amplifier and voice coil 1
- Short circuit to ground in the same signal wire between the amplifier and voice coil 1
- Damaged subwoofer module
What you can do
- 1Check that the fuses for the audio system are intact
- 2Note whether all sound or only the bass is missing, and whether the fault only appears now and then
- 3Have a workshop check the signal wire from the amplifier to the bass speaker for shorts to supply voltage and ground
- 4If the fault is permanent, the subwoofer module needs replacing by a workshop; if it is intermittent, it should be followed up
Symptoms you may notice2
- No sound from the loudspeakers
- Muffled or dampened sound from the loudspeaker
General guidance for car owners. Diagnosis on the car can point to a different cause.