2WD XC70....DEM-0007, definitely Pressure sensor failure??

[fred8601]

Hi All,

In all the recent icy weather I discovered that my XC70 was in fact 2WD, with only the from wheels spinning.

I have pulled the codes on a VIDA and have the DEM-0007 error code. I put the car up on axle stands and in drive, the rear wheels spin very slowly and I can hear a high pitched whining which I assume is the pump functioning properly? If I stop the rear wheels spinning the pitch increases, spin them around to match the front wheels and it slows down.

I checked the values and the pump pressure is at a constant 0.05Mpa.... nothing basically.

So I'm pretty confident the pressure sensor has failed (seems to be a relatively common failure), before I take the plunge however I wanted to check if I was missing something? The solenoid current seems very low.... could that in fact be the problem? Anything else I could be missing?

Thanks,
Freddie

[alvislacitis]

Hi mate did you manage to find culprit!?

[Clan]

Originally Posted by fred8601

Hi All,

In all the recent icy weather I discovered that my XC70 was in fact 2WD, with only the from wheels spinning.

I have pulled the codes on a VIDA and have the DEM-0007 error code. I put the car up on axle stands and in drive, the rear wheels spin very slowly and I can hear a high pitched whining which I assume is the pump functioning properly? If I stop the rear wheels spinning the pitch increases, spin them around to match the front wheels and it slows down.

I checked the values and the pump pressure is at a constant 0.05Mpa.... nothing basically.

So I'm pretty confident the pressure sensor has failed (seems to be a relatively common failure), before I take the plunge however I wanted to check if I was missing something? The solenoid current seems very low.... could that in fact be the problem? Anything else I could be missing?

Thanks,
Freddie

take the pump out and look at the filter on the end .. it might well be clogged with a jelly like substance . If you caught it early a clean up and new oil and filter would do it , other wise if neglected the pump will have worn itself out due to not enough oil flow through it .