VOLVO
DEM-P056017 - System Voltage. General Electrical Failures. Circuit voltage above threshold
System
Differential Electronic Module (DEM)
Volvo models this fault code applies to
Applies to the following models:
9 modelsS60 (2011–), S80 (2007–), V40 Cross Country (2013–), V60 (2011–), V60 Cross Country (2015–), V70 (2008–), XC60 (2009–), XC70 (2008–), XC90 (2003–)
Show models by year and engine (14)
- Volvo S60 (2011–)2011–2015
- Volvo S80 (2007–)2007–2015
- Volvo V40 Cross Country (2013–)2013–2015
- Volvo V60 (2011–)2011–2015
- Volvo V60 Cross Country (2015–)2015
- Volvo V70 (2008–)2008–2015
- Volvo XC60 (2009–)2009–2015
- Volvo XC70 (2008–)2008–2015
- Volvo XC90 (2003–)2005Transmission TF-80SC AWD only
- Volvo XC90 (2003–)2006Engine B8444S only · Transmission TF-80SC AWD only
- Volvo XC90 (2003–)2007–2010Engine 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) continuously monitors that the voltage supplied to it is reasonable. The code is stored when the voltage is too high, which can be caused by excessive charging voltage from a damaged alternator. The four-wheel drive is disengaged while the fault is present and for a short time afterwards.
Possible causes
- Damaged alternator
What you can do
- 1Read and erase the code, then road test to see whether it returns
- 2Check that the fuses are intact
- 3If you have a diagnostic tool, read the control module voltage with the ignition on; it should be close to the battery voltage. Then start the engine and read it again
- 4If the voltage rises too much while the engine runs, have a workshop check the alternator charging
- 5After replacing the four-wheel drive control module, the oil pressure pump or the clutch package, the control module must be calibrated, which a workshop should do
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 while the fault is present and for a short time after it has cleared
General guidance for car owners. Diagnosis on the car can point to a different cause.