DEM-0007 Hydraulic pressure faulty valve

[Metallo]

Hi guys,

I ran the diagnostics on my XC70 AWD and got this error:

As a result, the AWD does not work, I tested it myself today and I could only see the front wheels spinning.

VIDA says the possible root cause might be:

1) Damaged pressure sensor
2) Damaged feed pump
3) Too low oil volume in clutch
4) Internal leak in the clutch

Three years ago XeMODeX refurbished the DEM Module and I also replaced the differential oil pump.

The question is: where do I start from? I would exclude # 2
How do I check the oil volume in the clutch?
I could clean the pressure sensor...

Any other results I could get from VIDA that may help?

Thank you for your advice.

Alex

[JRL]

DEM pressure sensor
Not too expensive and probably the issue in your case

[vtl]

Check Haldex oil level (add to the top then back out about 100...150 ml).

Pressure sensor can die too, as JRL said.