VOLVO
DEM-0002 - Pressure sensor. Faulty signal
System
Differential Electronic Module (DEM)
Volvo models this fault code applies to
Applies to the following models:
7 modelsS40 (2004–2013), S60 (2001–2009), S80 (1999–2006), V50 (2004–2013), V70 (2000–2008), V70 XC / XC70 (2001–2007), XC90 (2003–)
Show models by year and engine (14)
- Volvo S40 (2004–2013)2005–2010Transmission AW50/51 AWD, M66 AWD only
- Volvo S60 (2001–2009)2003–2005All transmissions except: AW55-50/51SN
- Volvo S60 (2001–2009)2006–2008All transmissions except: AW55-50/51SN, TF-80SC
- Volvo S60 (2001–2009)2009Transmission AW50/51 AWD, M58 only
- Volvo S80 (1999–2006)2003–2006Transmission AW50/51 AWD only
- Volvo V50 (2004–2013)2005–2010Transmission AW50/51 AWD, M66 AWD only
- Volvo V70 (2000–2008)2003–2005All transmissions except: AW55-50/51SN
- Volvo V70 (2000–2008)2006–2007All transmissions except: AW55-50/51SN, TF-80SC
- Volvo V70 XC / XC70 (2001–2007)2003–2007
- Volvo XC90 (2003–)2003–2004, 2006All transmissions except: AW55-50/51SN
- Volvo XC90 (2003–)2005All transmissions except: AW55-50/51SN, TF-80SC AWD
- Volvo XC90 (2003–)2007All transmissions except: AW55-50/51SN, TF-80SC
- Volvo XC90 (2003–)2008All transmissions except: TF-80SC
- Volvo XC90 (2003–)2009Transmission AW50/51 AWD only
What does this fault code mean?
The four-wheel drive control module (DEM) calculates the oil pressure that should exist when the engine runs above a certain speed and compares it with the signal from the oil pressure sensor. The code is stored when the signal corresponds to a pressure outside reasonable limits, either too low or too high. The four-wheel drive is then blocked or disengaged.
Possible causes
- Damaged oil pressure sensor
- Faulty or damaged four-wheel drive control module (DEM)
What you can do
- 1Read and erase the code, then road test the car to see whether it returns
- 2Check that the fuses are intact
- 3If you have a diagnostic tool, read the oil pressure at idle and check that the value changes during a road test
- 4Check the connector between the control module and the oil pressure sensor for contact resistance and oxidation, and look for oil leaks at the four-wheel drive clutch
- 5If the code returns, have a workshop with diagnostic equipment road test the car on a lift, check the pressure and replace the control module if needed
Symptoms you may notice1
- The four-wheel drive does not work
What the fault can affect2
- The four-wheel drive is blocked
- The four-wheel drive is disengaged
General guidance for car owners. Diagnosis on the car can point to a different cause.