VOLVO
CEM-5F32 - Coolant temperature sensor Short circuit to ground
System
Central Electronic Module (CEM)
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–)
Show models by year and engine (10)
- Volvo S60 (2001–2009)2001, 2005–2009
- Volvo S60 (2001–2009)2002All engines except: D5244T2
- Volvo S60 (2001–2009)2003All engines except: B5244S6, D5244T2
- Volvo S60 (2001–2009)2004All engines except: B5244S6, B5254T4, D5244T2
- Volvo S80 (1999–2006)1999–2002, 2005–2006
- Volvo S80 (1999–2006)2003–2004All engines except: B5254T2
- Volvo V70 (2000–2008)2000–2003, 2005–2008
- Volvo V70 (2000–2008)2004All engines except: B5254T4
- Volvo V70 XC / XC70 (2001–2007)2001–2007
- Volvo XC90 (2003–)2003–2015
What does this fault code mean?
The central electronic module (CEM) monitors the water temperature sensor in the heater. A short to ground in the sensor line is read by the control unit as a fault, and the code is set, which only shows when the heater is active. The fault appears as poor heating in the passenger compartment.
Possible causes
- Signal wire short-circuited to ground
- Defective water temperature sensor
What you can do
- 1Read and note the code, clear it and start the heater to see whether the fault returns
- 2If you have a diagnostic tool, read the water temperature in live data and compare it with the engine temperature once the engine is warm
- 3Check that the connectors at the control unit and the sensor are secure and free from corrosion
- 4Use a multimeter to check the water temperature sensor wires for contact with ground (the body), testing one wire at a time
- 5If you have a diagnostic tool, watch the water temperature in live data as the engine warms up; if the value does not rise smoothly, a workshop should replace the sensor
Symptoms you may notice1
- Poor heating in the passenger compartment
General guidance for car owners. Diagnosis on the car can point to a different cause.