VOLVO
SUB-0020 - Control module. Internal fault
System
Subwoofer Module (SUB)
Volvo models this fault code applies to
Applies to the following models:
1 modelC70 (2006–2013)
Show models by year and engine (1)
What does this fault code mean?
The subwoofer module has registered an internal fault. It therefore does not reproduce sound according to the chosen setting, and the fault lies in the module itself.
Possible causes
- Internal fault in the subwoofer module itself
What you can do
- 1Erase the code with a diagnostic tool, switch the ignition off for a while and on again
- 2Adjust the sound setting and listen for whether the subwoofer follows
- 3If the code returns, have a workshop replace the subwoofer module
- 4After replacement, check that the sound follows the chosen setting
Symptoms you may notice1
- Sound reproduction from the subwoofer does not follow the setting
General guidance for car owners. Diagnosis on the car can point to a different cause.