VOLVO
PSR-0049 - Hall sensor signal backrest. Short to ground
System
Powertrain (Engine & Gearbox)
Volvo models this fault code applies to
Applies to the following models:
3 modelsC30 (2007–2013), C30 Electric (2011–2013), C70 (2006–2013)
Show models by year and engine (3)
What does this fault code mean?
The right power seat control module (PSR) reads a value from the backrest hall sensor that is too low. The fault lies in the signal cable being shorted to ground, and backrest adjustment is reduced as a result.
Possible causes
- Short to ground in the signal cable from the backrest hall sensor
What you can do
- 1Check that the seat fuses are intact; their locations are in the owner's manual or on the fuse chart
- 2Look for chafing and damaged insulation on the signal cable where it could touch the bodywork, and repair it
- 3With the battery negative lead disconnected, use a multimeter to check whether the signal cable touches ground (the bodywork)
- 4If the wiring is intact but the fault remains, have a workshop replace the hall sensor and, if the fault still remains, the control module
- 5Clear the code after the work and check that the backrest adjusts as normal
Symptoms you may notice1
- Reduced seat function
General guidance for car owners. Diagnosis on the car can point to a different cause.