VOLVO
DEM-P16891D - Oil Pressure Control Solenoid Circuit. General Electrical Failures. Circuit current out of range
System
Differential Electronic Module (DEM)
Volvo models this fault code applies to
Applies to the following models:
1 modelXC90 (2003–)
Show models by year and engine (4)
- 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) controls the control valve, the axial solenoid, by regulating the current. The code is stored when the current stays outside the permitted values for a longer period, which can be caused by a damaged valve, poor contact or a damaged control module. The check is made during normal driving, and the four-wheel drive is disengaged.
Possible causes
- Damaged control valve or axial solenoid
- Contact resistance and oxidation in the connectors
- Damaged four-wheel drive control module (DEM)
What you can do
- 1Read and erase the code, then road test under normal driving to see whether it returns
- 2Check the connector at the control valve for oxidation, loose contacts and damage
- 3Check that the wires to the control valve are intact and not chafed
- 4If the code returns, have a workshop with diagnostic equipment replace the control valve and the control module, as they are replaced as one unit
Symptoms you may notice2
- Four-wheel drive and all-wheel drive do 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.