C5 Poor performance
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Thread: C5 Poor performance

  1. #1
    Tadpole
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    Default C5 Poor performance

    Hi all,

    My 2012 Citroen c5 with THP 1.6 petrol engine a few weeks ago started to become very sluggish with a big loss of power, especially when going up hills. A couple of times I had to floor the accelerator and the car would just mope up a steepish hill in 2nd gear.

    So off to the Citroen Brisbane dealer I go. Within an hour they have diagnosed the problem as a faulty rear oxygen sensor. My jaw dropped when they gave me the cost... about $700.. you got to be kidding.. $700 for a sensor?

    Surely I can get one somewhere for cheaper than that.

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    Can anyone recommend a parts dealer I can ring to get a price on one of these sensors?

  2. #2
    1000+ Posts George 1/8th's Avatar
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    Hi Jeff,
    I'd be looking for a replacement part from the UK , and as an interim measure, I'd be pulling one out myself from the local wreckers yard.
    Good luck with it.

  3. #3
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    Call Martin at Thornleigh 02 9481 8400.He's a courier away. Quote your VIN.

    Otherwise a host of suppliers in the UK, many on ebay, for about 50 quid. It's not a big parcel for airmail.

  4. #4
    Tadpole
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    Hey, thanks!

    I gave him a call and quoted me $169 + GST for the same thing.

    The dealer decided they wanted to play games and make me wait around for 60 mins (when I should have been at work) because I told them I don't want to pay $500+ for a sensor and they needed time to talk to their manager or some such nonsense. I don't have time for those childish games, so thats the last time i'll be going to the Brisbane dealer, and I'll get Comet down the road to service it for me and they said they were quite happy to order it from Martin.
    jaahn and Jinandfonic like this.

  5. #5
    Fellow Frogger!
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    Hi Jeff

    I have a C5 with the THP engine. There could be a host of the things that can cause sluggish performance on these motors. Whatís the history of the timing chain? Has it ever been replaced? A common THP issue I am afraid.

    Also the turbo solenoid control valve can fail causing similar symptoms. By all means replace the oxygen sensor but be aware there could be other issues. Did a dash warning light pop up? Send me a PM if you like and happy to discuss my experience.

    THP engines have a slightly bad reputation, but they a wonderful motor once sorted.

  6. #6
    Fellow Frogger!
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    Quote Originally Posted by Jeff H View Post
    Hi all,

    My 2012 Citroen c5 with THP 1.6 petrol engine a few weeks ago started to become very sluggish with a big loss of power, especially when going up hills. A couple of times I had to floor the accelerator and the car would just mope up a steepish hill in 2nd gear.

    So off to the Citroen Brisbane dealer I go. Within an hour they have diagnosed the problem as a faulty rear oxygen sensor. My jaw dropped when they gave me the cost... about $700.. you got to be kidding.. $700 for a sensor?

    Surely I can get one somewhere for cheaper than that.

    Can anyone recommend a parts dealer I can ring to get a price on one of these sensors?

    These rogues sure know how to charge. Had much the same experience myself, one sensor supposedly faulty, their cost $800 plus labor. The same sensor from Bosch in Germany was $A250 on my doorstep. Bloody rip off stealers.

  7. #7
    Thank God for my Hydroen harrisson_citroen's Avatar
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    Quote Originally Posted by Jeff H View Post
    Hey, thanks!

    I gave him a call and quoted me $169 + GST for the same thing.

    The dealer decided they wanted to play games and make me wait around for 60 mins (when I should have been at work) because I told them I don't want to pay $500+ for a sensor and they needed time to talk to their manager or some such nonsense. I don't have time for those childish games, so thats the last time i'll be going to the Brisbane dealer, and I'll get Comet down the road to service it for me and they said they were quite happy to order it from Martin.
    If ever you are in a position where you cannot bypass the dealer for a reason or another I recommend going to the Gold Coast dealer who seem a lot more reasonable and knowlegeable.
    When I had an issue with a 2008 X7 cutting out on the motorway and going into limp mode, they promptly diagnosed an engine speed sensor, replaced it on a Saturday morning for $190 all up and washed the car as well. Can't beat that.
    On my latest 2014 X7 which I had to service at the dealer due to warranty, the total for a full on service was less than half the other dealer quotes.
    DS Un jour, DS toujours !

    DS23 IE Pallas Automatique
    C5 X7 163 Exclusive
    C3 II 2010

  8. #8
    Fellow Frogger
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    Quote Originally Posted by harrisson_citroen View Post
    ...
    On my latest 2014 X7 which I had to service at the dealer due to warranty....
    That's not actually the case in Australia and a common misconception. You are not forced to use a dealer for regular servicing to preserve your warranty. Nor is capped price servicing forced upon you.
    https://www.choice.com.au/transport/...aler-servicing

    Whomever services the thing, even if DIY, must follow the correct schedule and use parts and lubricants that meet the manufacturer's requirements if you want to keep your warranty intact. You want to keep records for when you are asked about the service history when trying to make a warranty claim, which will happen. Having a dealer history will likely make it easier though and there can be a benefit in using a specialist / dealer instead of a generic garage mechanic.

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