VOLVO
DEM-P066611 - PCM / ECM / TCM Internal Temperature Sensor Circuit. General Electrical Failures. Circuit short to ground
System
Differential Electronic Module (DEM)
Volvo models this fault code applies to
Applies to the following models:
7 modelsS60 (2011–), S80 (2007–), V60 (2011–), V70 (2008–), XC60 (2009–), XC70 (2008–), XC90 (2003–)
Show models by year and engine (10)
- Volvo S60 (2011–)2011–2012
- Volvo S80 (2007–)2007–2012
- Volvo V60 (2011–)2011–2012
- Volvo V70 (2008–)2008–2012
- Volvo XC60 (2009–)2009–2012
- Volvo XC70 (2008–)2008–2012
- Volvo XC90 (2003–)2009–2010Engine B6324S, B8444S only · Transmission TF-80SC AWD only
- Volvo XC90 (2003–)2011Engine B6324S5, B8444S only · Transmission TF-80SC AWD only
- Volvo XC90 (2003–)2012Engine B6324S5 only · Transmission TF-80SC AWD only
- Volvo XC90 (2003–)2013–2014Engine B6324S5, D5244T18 only · Transmission TF-80SC AWD only
What does this fault code mean?
The four-wheel drive control module (DEM) has a temperature sensor on its circuit board. The code is stored when the signal from the sensor falls outside what is normal, which can be caused by a signal wire shorted to ground. The four-wheel drive is then disengaged to protect the gearbox. The fault may lie in the connectors, the wiring or the control module.
Possible causes
- Contact resistance and oxidation in the connectors
- Signal wire shorted to ground
- Damaged temperature sensor in the control module
- Damaged four-wheel drive control module (DEM)
What you can do
- 1Read and erase the code, then road test to see whether it returns
- 2Check that the fuses are intact
- 3Check the connectors to the four-wheel drive control module for oxidation and loose contacts
- 4Use a multimeter to check that the signal wire to the control module has no contact with ground (the body) when the wire is disconnected
- 5If the code returns, have a workshop with diagnostic equipment check and replace the four-wheel drive control module
Symptoms you may notice2
- The four-wheel drive does not work
- Warning symbol and message in the display
What the fault can affect1
- The four-wheel drive is disengaged
General guidance for car owners. Diagnosis on the car can point to a different cause.