VOLVO
UEM-0080 - Rain sensor. Signal missing
System
Upper Electronic Module (UEM)
Volvo models this fault code applies to
Applies to the following models:
5 modelsS60 (2001–2009), S80 (1999–2006), V70 (2000–2008), V70 XC / XC70 (2001–2007), XC90 (2003–)
What does this fault code mean?
The upper electronic module (UEM) keeps checking the link to the rain sensor. The code is set when the sensor fails to reply to a request. It is not set if UEM-0081 or UEM-0082 is stored.
Possible causes
- Open circuit, short to ground or short to voltage in the supply or ground wire of the rain sensor
- Open circuit, short to ground or short to voltage in the data wire of the rain sensor
- Poor contact at the sensor or at the control module
- Defective rain sensor
- Defective control module
What you can do
- 1Put the wiper stalk in position 0 and check the rain sensor in that position.
- 2Check that the rain sensor connector is firmly seated and not corroded.
- 3Use a multimeter to check that the supply wire to the rain sensor is not broken and has no contact with ground or voltage.
- 4If no other fault is found, have a workshop replace the rain sensor.
- 5If the fault remains, have a workshop check the control module.
Symptoms you may notice1
- The rain sensor does not work
What the fault can affect2
- The windshield wipers run intermittently
- The windshield wipers may run at high speed
General guidance for car owners. Diagnosis on the car can point to a different cause.