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Thread: 08 D3 Electronic Gremlins

  1. #11
    Join Date
    Apr 2019
    Location
    Melbourne
    Posts
    5
    BradC is onto it; he has a good thread on this and worth a read.

    Fuel pressure related problems always seem to result in a cascading dropout of all modules on the D3/4/RRS high-speed CANbus (medium-speed unaffected). I don't know why but it just seems to be like that! I have read this is deliberate to save HPFP and injectors in the case of low fuel supply and potential cavitation but, that was written somewhere on the internet so who knows really...

    I feel the key part to the error codes is the powertrain 'P' code which relates to one of the two regulators/valves inside the high-pressure fuel pump (HPFP). I *think* it's telling you that it has opened to it's maximum amount, and there's a need for even more fuel to the fuel rails. As such, would possibly suggest that 1). the HPFP is simply not working correctly (either not pumping properly or pressure or volume regulator has gone) or 2). the fuel delivery to the HPFP is not quite enough - this is easy to do a heath-check on by measuring current draw at the LPFP fuse, and also the fuel pressure measured at the schrader bleed valve under the bonnet. As others have also said, you should expect a P0087 error, and also a p2290 (?) code relating to low injector pressure - perhaps this will come..

    Personally, I have had two seperate occurrences of fuel related P codes that result in CANbus dropouts - they are not good for ones relationship as you say, or anything else for that matter!! First instance was EVENTUALLY traced to a hairline crack in filter housing meaning that air was getting into the fuel at random times - this was a tricky one to find but oh so rewarding when finally found!! Second time about a year later (I'm still not actually sure..) but hasn't returned after simply changing fuel filter (I changed low-pressure pump, because it's old and probably had a dirty filter which it certainly did!); if I begin getting error codes relating to HPFP regulators then I will be changing the HPFP at that point.

    In a way, the strangest thing is this part "The P117D message has only appeared twice, out of about 10 failures, usually not there. The rest of the codes are consistent"... Unless you ALSO have a short to ground somewhere on you high-speed CAN... Now that would be unlucky!!

  2. #12
    Join Date
    Nov 2011
    Location
    East Gippsland
    Posts
    21
    Shortly after we purchased the D3 in late 2011, we had a rodent chew through some cables, caused a CAN bus fault, and would not start. Was taken to MR Automotive at Redcliffe on a flat bed and they repaired some cable damage. There were no further issues for nearly 8 years apart from for a while we would get a suspension warning light flash and ping, but have not had this alarm for several years.

    I am now startign to document all alarms in a spreadsheet with date so that I can look for common. Probably should change the Fuel Filter.

    Peter

  3. #13
    Join Date
    Jan 1970
    Location
    Canberra
    Posts
    15,528
    I am with Ean - I had all this when my Varta battery was dying due to old age - not a sudden death just fading away gracefully but throwing up codes all over the place - almost like a dead alternator. When removed the old battery still had its voltage and tested OK under load but its CCA was down from over 900 to under 300. It would still start the car ok as long as it fired up straight away.

    So check the battery - voltage, load and CCA - if any are suspect replace.
    REMLR 243

    2007 Range Rover Sport TDV6
    1977 FC 101
    1973 Haflinger AP700
    1971 Jaguar V12 E-Type Series 3 Roadster
    1957 Series 1 88"
    1957 Series 1 88" Station Wagon

  4. #14
    Join Date
    Feb 2019
    Location
    Sydney
    Posts
    24

    Blocked drains

    Quote Originally Posted by PerthDisco View Post
    Blocked sun roof drains perhaps? Have not heard of aircon drains blocking.
    I have a SE no Sunroof
    Drains were totally blocked of dirt silt etc from aircon

    Cheers Chris
    Last edited by Crustie; 17th May 2019 at 11:46 AM. Reason: speling
    2009 Discovery v6 Petrol,

  5. #15
    Join Date
    Nov 2011
    Location
    East Gippsland
    Posts
    21
    Mine is an SE, no sunroof.

    No issues yet. Will see this weekend.

    Peter

  6. #16
    Join Date
    Feb 2019
    Location
    Sydney
    Posts
    24

    Gremlins Back

    Hi
    After replacing most brake parts the Brakes still had a fault, Then we found under the carpets were flooded I dried the carpets and unblocked the
    Air-conditioning drains, Since that was done no problems until today, Fault code for brake switch again. In just about give up total cost to date $2500.00
    plus previous owner had same problem and spent about the same ( only found out after I purchased the D3)
    Never had so many problems with any car in 40 years
    2009 Discovery v6 Petrol,

  7. #17
    Join Date
    Oct 2012
    Location
    Perth
    Posts
    897
    Never heard of air cond drains blocking? Not sure how they would get blocked at the evaporator inside the cabin with the pollen filter cleaning incoming air.

  8. #18
    Join Date
    Jan 1970
    Location
    St Helena,Melbourne
    Posts
    13,108
    Quote Originally Posted by PerthDisco View Post
    Never heard of air cond drains blocking? Not sure how they would get blocked at the evaporator inside the cabin with the pollen filter cleaning incoming air.
    Common on all previous model landys, condensation pools when it can't drain to the exterior.
    MY08 TDV6 SE D3- permagrin ooh yeah !
    98 TDI AUTO SE DISCO - gone and will be missed.
    2003 Dingo offroad camper trailer
    1998 Triumph Daytona T595
    1974 VW Kombi bus
    1958 Holden FC special sedan

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