VOLVO
SUM-C1A0511 - Left Rear Height Sensor. General Electrical Failures. Circuit short to ground
System
Suspension Module (SUM)
Volvo models this fault code applies to
Applies to the following models:
7 modelsS60 (2011–), S80 (2007–), V60 (2011–), V60 Cross Country (2015–), V70 (2008–), XC60 (2009–), XC70 (2008–)
What does this fault code mean?
The height sensor at the left rear wheel gives a signal with too low a voltage, which the SUM interprets as a fault. The height sensor tells the control module the body's position, so when the signal is wrong the Four-C function is switched off.
Possible causes
- Contact resistance or oxidation in the connectors
- The signal cable from the height sensor is short-circuited to ground
- The height sensor has no power supply
- Damaged height sensor
What you can do
- 1Read and note the code, clear it, then road test the car
- 2Check that the relevant fuses are intact; their locations are in the owner's manual
- 3Check that the connector at the height sensor at the left rear wheel is secure and not corroded
- 4Use a multimeter to check that the signal cable is not connected to ground (the body), with the connector at the height sensor disconnected
- 5Inspect the cable from the height sensor at the left rear wheel for chafing and pinch damage
- 6If the fault returns, have a workshop with diagnostic equipment check the height sensor and the wiring
Symptoms you may notice2
- A message appears in the information display
- The Four-C function does not work
What the fault can affect1
- The Four-C function is switched off
General guidance for car owners. Diagnosis on the car can point to a different cause.