VOLVO
CEM-8E01 - Reversing light. Signal too low. Intermittent fault
System
Central Electronic Module (CEM)
Volvo models this fault code applies to
This fault code has different meanings depending on model, model year or engine. Select the meaning that applies to your car.
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?
This code concerns the reversing light and its switch. The control module has registered a low signal from the reversing light switch while a gear from 1 to 5 is engaged and the car is above a certain speed. The fault is intermittent and may not be present right now.
Possible causes
- Faulty reversing light switch
- The wire from the reversing light switch is short-circuited to ground
What you can do
- 1Check that the reversing light comes on only when reverse gear is engaged
- 2Check that the connector at the reversing light switch is firmly fitted, clean and dry
- 3With the ignition off and the connector unplugged, use a multimeter to check that the wire from the switch has no contact with ground (the body)
- 4If the fault comes now and then it may be intermittent. Have a workshop replace the reversing light switch if the fault returns
Symptoms you may notice1
- The reversing light is constantly lit
General guidance for car owners. Diagnosis on the car can point to a different cause.