C5 power down
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Thread: C5 power down

  1. #1
    Fellow Frogger!
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    Default C5 power down

    My first post since purchasing a lovely 2007 C5 2.0Hdi (thanks WRB!):

    Since an oil and filter change (yes it's the correct oil), the motor just seems to lack the same punch, but it's still perfectly drivable. I reset the service interval thing in the instrument panel but didn't do anything else - is it possible this car has gone into some kind of 'slow and steady' mode simply as a result of an oil change?

    I don't yet have a Lexia type system to plug into it (thinking the one from Germany might be the one to get) but so far as I can tell there are no warnings or signs that it is not operating normally other than the loss of power.

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    Advice, other than "take it to a dealer", would be much appreciated!

    Geoff
    Cheerio,

    Geoff (in Mirboo North)


    2009 Peugeot 407 HDi Sedan
    2007 Citroen C5 HDi Wagon
    2003 Merc Vito 112Cdi
    1997 Toyota Hilux Surf
    *non-sequitur - 1951 Hudson Pacemaker brush-painted matt black shortly to be converted to electric!


  2. #2
    Fellow Frogger
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    There are vacuum pipes down the front of the engine and there is a Y-piece in the bundle that can crack. Start there. Have a look at those or do a vacuum leakdown test if the problem arose just after the oil change, the filter being down the front of the engine. It's a very common issue with the 6 speed 2.0Hdi C5 with the DW10B engine. The car will feel gutless and usually declines to change up to top gear. A few bits of rubber tube and a washer hose Y or T-piece would fix it.
    Last edited by David S; 30th September 2014 at 12:29 PM.

  3. #3
    Fellow Frogger!
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    Do you mean this little fella?

    C5 power down-img_1806.jpg
    Cheerio,

    Geoff (in Mirboo North)


    2009 Peugeot 407 HDi Sedan
    2007 Citroen C5 HDi Wagon
    2003 Merc Vito 112Cdi
    1997 Toyota Hilux Surf
    *non-sequitur - 1951 Hudson Pacemaker brush-painted matt black shortly to be converted to electric!


  4. #4
    Fellow Frogger!
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    My 03 c5 petrol had a similar issue. After replacing the water pump (was working but sounded like the bearing was starting to go just before I changed it), back to normal. No errors or anything, just really sluggish but perfectly driveable. Also changed timing belt at the same time but belt looked pretty good before I removed it so guessing water pump was the issue.

  5. #5
    Fellow Frogger! ScotFrog's Avatar
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    Quote Originally Posted by David S View Post
    There are vacuum pipes down the front of the engine and there is a Y-piece in the bundle that can crack. Start there. Have a look at those or do a vacuum leakdown test if the problem arose just after the oil change, the filter being down the front of the engine. It's a very common issue with the 6 speed 2.0Hdi C5 with the DW12B engine. The car will feel gutless and usually declines to change up to top gear. A few bits of rubber tube and a washer hose Y or T-piece would fix it.
    Does this apply to the 2.0 L HDi diesel too David? My 2002 C5 regularly runs in sluggish mode on a cold start but if I allow it to warm up for 5 minutes before driving is as good as gold. This problem only started after a service which included an oil and filter change.

    SF

  6. #6
    Fellow Frogger!
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    Well after David's suggestion I found that white plastic 'Y' piece was not only cracked, as soon as I touched it the thing fell apart. What a diabolical little piece of Italian rubbish. With judicious use of a 4mm drill bit and a heat gun I managed to get the remnant barbs out of the nasty little hard plastic vacuum tubes without causing further leaks. Down to the local hardware shop for a little garden 'T' piece and hey viola!
    C5 power down-img_1821.jpg
    I cleaned up the intake gadgetry/butterfly etc. whilst at it, and the car now pulls like a train.
    All praise to David S, may peace be upon him!!!

    Geoff
    Cheerio,

    Geoff (in Mirboo North)


    2009 Peugeot 407 HDi Sedan
    2007 Citroen C5 HDi Wagon
    2003 Merc Vito 112Cdi
    1997 Toyota Hilux Surf
    *non-sequitur - 1951 Hudson Pacemaker brush-painted matt black shortly to be converted to electric!


  7. #7
    Fellow Frogger
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    That's a very neat job. Well done. Not exactly an expensive repair and a major improvement.

    This only affects the DW10B 2.0HDi in C5,C4 and Picassso models with RHR in the VIN. So, no it will not be your issue Scotfrog.

    Edit: The vacuum hose set looks something like this, with the white y-piece being near the middle.

    C5 power down-hdivac1s.jpg C5 power down-hdivac2s.jpg

    Same issue on a 307 with the DW10B / RHR engine here:
    307 HDi 2.0l Lack of power - Turbo fault code P2562 P0299
    Last edited by David S; 18th December 2015 at 12:42 AM.

  8. #8
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    These gas fittings are available in brass:
    C5 power down-tee.png

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