VOLVO
POT-B118712 - Trunk motor. General Electrical Failures. Circuit short to battery
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) checks the voltage supplying the motors for the tailgate lock, closing and opening. The voltage has become too high, which means the supply has picked up contact with voltage, or that there is a short circuit in the connectors. The code is set when the tailgate cannot close because something blocks it, and a damaged motor can also cause it.
Possible causes
- The cable is short-circuited to supply voltage
- Short circuit in the connectors
- The supply is short-circuited to battery voltage
- Damaged tailgate motor
What you can do
- 1Clear the fault code, then cycle the tailgate open and shut with nothing in its path, and see whether the code comes back
- 2Check that the fuses for the tailgate are intact
- 3Check that the connectors at the motors and the control module are firmly seated and free from short circuits or corrosion
- 4Use a multimeter to check that the supply cable has no voltage to ground where it should not have any
- 5If the wiring is intact: have a workshop check the motors
Symptoms you may notice4
- The tailgate is hard to open
- The tailgate is hard to close
- The central locking for the tailgate does not work
- Automatic opening and closing of the tailgate does not work
General guidance for car owners. Diagnosis on the car can point to a different cause.