VOLVO
CCM-B1A6909 - Humidity Sensor. General Electrical Failures. Component Failures
System
Climate Control Module (CCM)
Volvo models this fault code applies to
Applies to the following models:
9 modelsS60 (2011–), S80 (2007–), V40 (2013–), V40 Cross Country (2013–), V60 (2011–), V60 Cross Country (2015–), V70 (2008–), XC60 (2009–), XC70 (2008–)
What does this fault code mean?
The humidity sensor sends an error message to the climate control module (CCM), which registers the fault. The cause is an internal fault in the sensor. Defogging of the windows and mirrors may then work poorly or stop.
Possible causes
- Internal fault in the air humidity sensor
What you can do
- 1Clear the code and road test the car to see whether it returns
- 2Try the defog function with the control and see whether air reaches the windows
- 3Check that the humidity sensor connector is secure and not corroded
- 4With a diagnostic tool, read the humidity sensor value in live data while the defog runs; replace the sensor if it does not change
Symptoms you may notice4
- Mist on the windows and/or the outside mirrors
- Mirror defog or defrost does not work
- Side window defog or defrost does not work
- Windscreen defog or defrost does not work
General guidance for car owners. Diagnosis on the car can point to a different cause.