VOLVO
CEM-U023000 - Lost Communication With Rear Gate Module. General Failure Information. No sub type information
System
Central Electronic Module (CEM)
Volvo models this fault code applies to
Applies to the following models:
6 modelsS60 (2011–), V60 (2011–), V60 Cross Country (2015–), V70 (2008–), XC60 (2009–), XC70 (2008–)
What does this fault code mean?
The fault code means that the control module storing the fault has lost its link to the tailgate module (POT), or the link is disturbed. The automatic opening and closing of the tailgate or boot lid may then stop working. The fault concerns the network rather than one individual control module.
Possible causes
- The POT receives no supply voltage
- Broken ground lead to the POT
- Poor contact in the connections
- Open or shorted CAN wiring
- A module not intended for the car, such as a used unit with other software or hardware
What you can do
- 1Switch the ignition on and try the automatic function to see whether anything happens
- 2Confirm the POT fuse in the rear relay and fuse centre is intact
- 3Check the connections between the rear relay and fuse centre and the POT for contact resistance, oxidation and damage
- 4Check the ground wire for breaks or shorts to voltage, and the ground point for play. If the fault returns, have a workshop check the CAN wiring
Symptoms you may notice1
- Automatic opening and closing of the tailgate or boot lid does not work
General guidance for car owners. Diagnosis on the car can point to a different cause.