VOLVO
POT-U001000 - Medium Speed CAN Communication Bus. General Failure Information. No sub type information
System
Power Operated Tailgate (POT)
Volvo models this fault code applies to
Applies to the following models:
3 modelsV70 (2008–), XC60 (2009–), XC70 (2008–)
Show models by year and engine (3)
What does this fault code mean?
The tailgate control module (POT) communicates with the other control modules over the MS-CAN bus. Serious interference has been registered on the network, so communication is blocked and the control module cannot be reached. The cause may be a short or break in the CAN wiring, an internal fault in the POT, or a fault in another control module on the same part of the network.
Possible causes
- Short circuit between the CAN wiring
- Open circuit in the CAN wiring
- Internal fault in the tailgate control module (POT)
- Internal fault in another control module on the same part of the CAN network
What you can do
- 1Check that the battery is charged and that the fuses for the tailgate are intact
- 2If you have a diagnostic tool: start with the communication fault codes in the other control modules, clear them and test drive
- 3Check that the connectors at the tailgate control module are firmly seated and free from corrosion
- 4Have a workshop with diagnostic equipment measure the CAN network, since it needs readings at several points
- 5Do not replace the central electronic module (CEM) for a CAN fault unless the workshop has found an internal fault in it
Symptoms you may notice4
- The tailgate is hard to close
- The tailgate is hard to open
- The central locking for the tailgate does not work
- Automatic opening and closing of the tailgate does not work
What the fault can affect1
- Limited function in the tailgate control module (POT)
General guidance for car owners. Diagnosis on the car can point to a different cause.