VOLVO
TRM-U300042 - Control Module. System Internal Failures. General memory failure
System
Trailer Module (TRM)
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 tow hitch control module (TRM) has registered a general memory fault in the module. The fault lies in the module itself, and the trailer lamps may behave incorrectly.
Possible causes
- Damaged tow hitch control module (TRM)
What you can do
- 1Disconnect the battery negative terminal for a while, reconnect it, and then read the fault code
- 2If the code is still present after the restart, a workshop needs to replace the tow hitch control module
Symptoms you may notice2
- Trailer lamps do not work correctly
- Trailer lighting does not work
General guidance for car owners. Diagnosis on the car can point to a different cause.