Guest sean rupp Posted December 31, 2010 Report Share Posted December 31, 2010 I am having the same type problem withthe Ford freestyle AWD my wife drives. It uses the volvo haldex rear and throws a p1889 ford code for low oil pressure. I started out changing the oil and filter in it at 80k miles, Ford calls it a lifetime oil, Im not convinced. It still worked when warm but would throw the code in the mornings. Ford is worthless on assistance, since the Ford Volvo split the only help is to replace the complete haldex for 3-4k. I am certain it is repairable if i can find the right info. I took out the DEM and replaced the oil sensor with a new volvo unit. Once I did that and reinstalled the DEM it wont communicate with the traction control unit any more. I was reading the post above and it looks like I could test the pump and the haldex unit by directly powering the pump and seeing if it engages properly correct? if the unit locks in with power to the pump then odds are the dem is the fault and not communicating with the TC and the rest of the system. I can get a new dem from ford for $750, normally $1100 if you dont get the discount. Swapping the dem for a new unit Automatically requires software update from what ive read. If the original DEM is removed and reistalled, could it possibly need software reloaded? The error right now is communication based and not a hard code like the oil pressure. Is there a way to test the DEM module itsself? I have heard comments about a bad solder joint in the haldex DEM that can be repaired but it must be under the sealed tin cover. I know its not a volvo but the failing part is the same. Any thoughts on testing it would be appreciated, i just cant afford to put 3-4 grand in it right now and i cant believe that its not a servicable item. Thanks for your input Sean Link to comment Share on other sites More sharing options...
winnipegtibook Posted January 3, 2012 Report Share Posted January 3, 2012 Shadow, can you re-post or link to the photos? I have a AWD system that ain't working and trying to sort out how to fix this myself, but if only I could find a code reader... Link to comment Share on other sites More sharing options...
Ghost Shadow Posted January 7, 2012 Author Report Share Posted January 7, 2012 never realized i deleted these pictures, its been so long ago...sorry Link to comment Share on other sites More sharing options...
rpellegrom Posted January 12, 2012 Report Share Posted January 12, 2012 Shadow, can you re-post or link to the photos? I have a AWD system that ain't working and trying to sort out how to fix this myself, but if only I could find a code reader... Let me know if you end up needing a DEM unit. I had mine out and sent it to be rebuilt because of moisture in the unit at XeMODex at a cost of $499 and hit a deer and totalled the volvo a week later. It worked perfect after I installed it and takes all of 5 minutes to replace. I had a 2004 XC90 T6 with DEM 30783132. It carries a lifetime warranty from XeMODex and I would be happy to negotiate a price. I can also email pictures of the unit. Thanks, Rick rpellegrom@live.com Link to comment Share on other sites More sharing options...
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