2007 XC90 3.2 AWD Issue DEM-P188974
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    1. #1
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      [FIXED] 2007 XC90 3.2 AWD Issue DEM-P188974

      I recently bought a used 07 XC90 3.2 with 146k from a local dealer. Everything road great until a snow storm hit and notice the AWD wasn't working. I checked with a ViDA DiCE tool and gave me (DEM-P188914 Oil pressure pump performance. General electrical fault. Short circuit to ground or open circuit) code. I contacted the dealer and they replaced the pump, put new oil in and the error code went away. The same day I got it the car back back, I checked with the ViDA DiCE tool and it no longer shows the code but now shows a new code:

      DEM-P188974 Oil Pressure Pump Performance. Mechanical Failures. Actuator slipping

      I'm lost at this point. Any help is appreciated.

      Link to PDFs what the tool reads.


      DEM-P188974-Error Code-Details
      DEM-P188974-Error Code

      Issue Fixed See Post #5
      Last edited by powza; 02-22-2018 at 02:15 PM. Reason: Issue Fixed

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    3. #2
      Member ggleavitt's Avatar
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      Maybe go into VIDA (Fault Tracing/Diagnostic Trouble Codes and Associated Procedures), look this code up:

      Diagnostic trouble code (DTC) information DEM-P188974

      Condition
      The Differential electronic module (DEM) checks the oil pressure in the Haldex clutch using an oil pressure sensor.
      When the engine speed exceeds 500 rpm, an initial pressure builds up in the clutch via an electric feed pump.
      The diagnostic trouble code (DTC) is stored if the control module detects that:
      Initial pressure not reached within 2-4 minutes.
      The control module's test for the diagnostic trouble code (DTC) starts in the event of:
      Engine speed (RPM) higher than 500 rpm.

      Substitute value
      Four wheel drive is disengaged.

      Possible source
      Pressure sensor is not functioning.
      Damaged feed pump.
      Too low oil volume in clutch.
      Internal leak in the clutch.

      Fault symptom[s]
      Four wheel drive is not functioning.

      There's a basic troubleshooting procedure as well.

      Please let us know what this ends up being caused by.
      2005 XC90 B5254T2 019 198k
      2008 XC90 B8444S Sport 452 129k

    4. #3
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      The dealer agreed to check out the issue further to get it fixed. Scheduled to go in on Monday. They did say they replaced the filter when they installed the new pump.

      My initial thought was the oil is low since he had to replace it when he replaced the pump. He insured it wasn't.

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    6. #4
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      Fixed my 07 XC90 V8 on Friday for the same DTC. Replaced the pressure sensor and filter and all is well. Pressure sensor was bad. Best 100.00 I've spent. Using VIDA and an amp meter I was able to test the pump and monitor pressure change. VIDA also shows pump current draw as a way to verify pump operation.

    7. #5
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      Sorry, for the delayed response.

      The issue is now fixed. Below is listed all stuff replaced

      DEM-P188914
      The dealer replaced the following:
      AOC Oil Pump - Dorman 699-002
      Haldex Fluid

      DEM-P188974
      The dealer replaced the following:
      Pressure Sensor - 30759668
      Coupler Filter - 30787687
      O Ring - 925263
      Haldex Fluid

    8. #6
      Member ggleavitt's Avatar
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      Makes perfect sense, thanks for posting !
      2005 XC90 B5254T2 019 198k
      2008 XC90 B8444S Sport 452 129k

    9. #7
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      https://www.youtube.com/watch?v=uZNC06Z7imQ

      When the weather turns nice I plan on servicing as done on this Youtube video. Hopefully it cures our intermittent AWD problem.

    10. #8
      Member ggleavitt's Avatar
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      https://forums.swedespeed.com/showthr...built-the-same
      https://forums.swedespeed.com/showthr...nd-differences
      https://forums.swedespeed.com/showthr...x-Servicing-Qs
      https://forums.swedespeed.com/showthr...ldex-2008-XC90


      Your car is a 2007 V8 I believe (had to go back into your old posts- get a signature https://forums.swedespeed.com/profile...=editsignature up, will ya?) should have GEN III to get your orientation. Fluid filter is easy enough to replace in place, think for the pump/screen you'll need to remove the driveline flange on the AOC to get to it. Another write-up on this somewhere in Swedespeed, if I can find I'll re-post.
      2005 XC90 B5254T2 019 198k
      2008 XC90 B8444S Sport 452 129k

    11. #9
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      Alternate part numbers for the pump may be Volvo 30783079 or Ford 7F9Z4C019A.
      07 XC90 3.2

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