2010 C5 X7 Anti-polution System Faulty
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  1. #1
    Tadpole
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    Default 2010 C5 X7 Anti-polution System Faulty

    The anti-polution system faulty warning comes on every few days and goes out within 1 -3 days.
    I have discovered that the previous 2 owners got it serviced at non-Citroen specialists, so could it be the result of using inferior oils?
    I've had the Citroen dealer do a regen/burn off 2 months ago which made no difference. The car yard I bought it from cleaned the EGR valve by removing a lot of pipes etc from the front of the engine, but did not remove the EGR valve. It made no difference.
    Last week the dealer put genuine oil in and did another regen/burn off and the warning has only just come on again after 7 days and went out almost immediately.
    Anyone know what will cure the problem?

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  2. #2
    Fellow Frogger
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    It depends on what is causing the anti-pollution fault. You'd need to know the specific fault codes to go looking. Take it for a decent drive and see what transpires. What's in your VIN RHH or the earlier RHR? The engines are different and being 2010 could be either.

  3. #3
    1000+ Posts Ken W's Avatar
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    Gar,

    Perhaps next time you could put up one post that has all these questions together. It is likely that the same people will be able to help.

    Also you have pointed out it is a sedan but not what sort of engine it has. It could be a V6 for all we know.

    As David has said anti-pollution fault covers most of the engine fault codes so more detail is required for us to help. It sounds like it is realted to the DPF. Maybe you are looking at having to get a new one.

    Cheers, Ken
    Last edited by Ken W; 4th December 2016 at 06:33 PM.

  4. #4
    Tadpole
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    Thanks all,
    This is my first foray into forums and I saw one post saying that I should keep different topics in separate posts.
    Its an RHH 2.0 Hdi. I'm taking it to the Citroen dealer again in 2 weeks so will see if they will tell me the codes.

  5. #5
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    As David said, you need the computer codes to get anywhere.

    On the RHH motor (aka DW10CTED4) the EGR valve is mounted on the front, at the transmission end of the head. There is a passage through the head from the exhaust manifold to the valve, which is electrically operated (black plastic top). There is a shiny water cooler attached. A short tube goes to the intake plenum.

  6. #6
    1000+ Posts George 1/8th's Avatar
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    It might be that "swirl valve" thing that always breaks. They can cause all kinds of problems. Good luck with it.

  7. #7
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    No swirl valve. Gar's car is a 2.0 HDI DW10C (RHH) This engine achieves swirl using two inlet passages per cylinder with different orientation over the valves.

  8. #8
    1000+ Posts George 1/8th's Avatar
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    Thanks Seasink, that settles that then. I don't know anything about diesels except that they are not for me.

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