206 GTi Anti-pollution fault
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  1. #1
    Tadpole
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    Default 206 GTi Anti-pollution fault

    Hey guys, hopefully someone can help.
    My parentals bought my old 206GTi off me and it's been throwing anti-pollution fault codes just recently. It idles/runs rough, limited power, sounds like its running on 3 cylinders.
    Because my normal pug mechanic is too busy (few weeks before he can look at it), and the same response from Pug dealers it was sent to one of the 'large chain' mechanics who replaced the spark plugs and coil in the first instance, and then released the car only to come up with the anit-pollution fault the day after.
    Wen back to the same mechanics and they said it is a faulty injector, which they then replaced and ultrasonically cleaned the others, and replaced the fuel filter (my recommendaton).
    Car was released, and again, the day after it has come up with the anti-pollution message.

    Any ideas? My parents are pretty pi.ssed at spending over $1000 on stuff that hasn't fixed the problem, and that may not have needed doing in the first place!

    I think I will call said 'mechanics' on Monday and ask they supply me with the actual fault codes they have registered for the car.

    Fixxxer

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  2. #2
    Fellow Frogger! DjB8V's Avatar
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    Exhaust blockage?

  3. #3
    Tadpole
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    Hmmm, not sure. I would have thought it would just sound weird if it was. But its idle/running like its on 3 cylinders.

  4. #4
    Fellow Frogger! DjB8V's Avatar
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    Fault point in the ignition somewhere? Leads, coil etc.


    Chris

  5. #5
    Tadpole
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    Coil was replaced. These have no 'leads', they are coil over plug setup.
    I'm starting to think its some sort of triger problem. Like its not picking up the signal to 'fire' one cylinder.??

  6. #6
    Fellow Frogger!
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    dude ur in Brisbane, take ur pug to Magic @ EMS, Mountjoy St wgabba.
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  7. #7
    Tadpole
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    Does anyone have a number for him?
    I can't find that name of business or any reference to a euro mechanic on Mountjoy St.
    My other option is my usual pug specialist at Woolloongabba (Le French) although they can't see it till Thursday maybe?

    Thanks,
    Fixxxer

  8. #8
    Fellow Frogger! gromzx's Avatar
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    I'd say most likely the catalytic converter or 1 of the 2 Exhaust gas O2 sensors. (I'm pretty sure the 206's 1 O2 sensor either side of the CAT.)

    This problem is pretty common.
    My brother had the same thing happen to his 206 GTi, but it cleared itself.
    Have you tried giving it a good thrash to get the O2 sensors hot and then restart the engine to see if the fault clears itself?
    Dose it only happen when the engine is cold, or a any time?
    Last edited by gromzx; 27th June 2011 at 05:21 PM. Reason: Extra info.

  9. #9
    Tadpole
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    I'm hoping its something quick/simple like a bad O2 sensor, or cat, although I would have expected that a fault code would have pointed to this issue.

    First time it happened the car was warm and was slowing for a set of lights. The 2nd time it was a cold start, and third time a cold start I think.
    It's going back for a third time tomorrow.

    Fixxxer

  10. #10
    1000+ Posts mr bern's Avatar
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    MAP sensor?

    Could be just a leak in a dodgy inlet manifold that might need tightening. Service dept at Booran Euro diagnosed just such a prob on my car years ago in about 10 minutes flat (with the aid of the appropriate diag device), and (even better!) fixed it multo promptly for an extremely reasonable (ie, NO) fee.
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  11. #11
    Tadpole
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    Going from bad to worse.
    They say it's now another 'injector failure' as that is what the fault code says. Just out of interest I called a Pug mechanic who works on these every week and he mentioned that he has never had an injector fail in these engines, let alone two, in the same car, at the same time!
    The saga continues, almost 3 weeks now.

  12. #12
    1000+ Posts Capago's Avatar
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    there is absolutely NO point in replacing parts without a fault code on these cars, waste of time. they produce simptoms of problems which may or may not be the actual cause of the problem that you think.

    as you said an "injector failure" and their rarity, id personally think its not related to the problem (unless its an aftermarket replacement or somethings gone wrong once theyve been cleaned. get it tested but my money is on a failing engine ecu throwing faults, or bad wiring.

    you should see what happens when a BSI fails....abs faults, radio not working and beeping, engine management faulty messages, power steering not working, comms unit not responding to inputs & seatbelt pretensioner faults all at once...or so its telling you..

    take it to your local dealer up in brisbane, get it done once, pay to get the problem sorted for it once. every dealer has the proper peugeot diagnostics and a bald pommy to get it done haha
    Last edited by Capago; 3rd July 2011 at 11:35 PM.
    The wrong oil is better than no oil at all.

  13. #13
    Tadpole
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    Fault codes were along the lines of P0201 (No. 1 injector) and other similar fault codes when they moved this injector to other cylinders (e.g., P0202 - injector No.2), etc. Also said something about P0268? injector high circuit and said there was a problem (resistance dropped) when the injector was hot (was fine when cold). Praying this will sort the problem.

  14. #14
    1000+ Posts Capago's Avatar
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    Quote Originally Posted by Fixxxer View Post
    Fault codes were along the lines of P0201 (No. 1 injector) and other similar fault codes when they moved this injector to other cylinders (e.g., P0202 - injector No.2), etc. Also said something about P0268? injector high circuit and said there was a problem (resistance dropped) when the injector was hot (was fine when cold). Praying this will sort the problem.
    if the code is following the injectors movements to different locations its definately an injector then.
    The wrong oil is better than no oil at all.

  15. #15
    Tadpole
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    Hey all,
    Just to complete the story.
    Car is now fixed and running fine.
    The 2nd injector was replaced, but the problem was still there, so ALL injectors were replaced and the issue has disappeared. Weird but true.
    Thanks for everyones help on this.
    Fixxxer

  16. #16
    the famous 18E pug206gti's Avatar
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    G'day,

    welcome to French cars...
    regards,
    Les W.


    206 GTi 180
    the stealth Pug
    Did I do anything last night that suggested I was sane?








  17. #17
    Tadpole
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    Heard from my parents this morning, same rough running and anti-pollution / ASR? faults showing up on screen.
    Not happy.

    Gonna go check it out quickly, and get the RACQ guy to read the fault codes.

    Fixxxer

  18. #18
    Tadpole
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    Definitely get the fault code. Sounds to me like a sensor issue or something funky with the cat. Either way, I would always check fault codes before replacing anything.

  19. #19
    Tadpole
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    Basic checks of the motor showed that coil pack was firing correctly, fuel injectors were 'injecting'. ECU check showed up an unrelated code and some sort of fuel pickup/pump issue which he described as a 'generic' fault code and did not really indicate what the issue was.
    Still missfiring, but not as bad as the other time (9 months ago). Still showing anti-pollution fault, and catalytic convertor fault if left running for a while.
    Maybe lambda sensor/s???
    I guess it's going off to Peugeot for a proper hookup on their engine diagnostics. More $$$$$$$.
    The saga continues....

  20. #20
    Fellow Frogger! cme2c's Avatar
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    Mine was doing something similar (and cutting out when driving). Scary. In my case, turned out to be the coil pack, but it STILL misbehaved after replacement until the multiple fault codes were cleared from the ECU. These coil packs can cause all sorts of trouble, as I understand they can send voltage spikes back to the ECU and cause multiple fault codes, and even brick the ECU.

    The other advice is good, you need to find out what he ECU thinks is wrong, and if that makes no sense, suspect the ECU. Mine is a 2003 multiplexed car.
    206 GTi 2003
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  21. #21
    Tadpole
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    Tried car today, still missfiring. Except this time cylinder 3 injector didn't change engine note when disconnected/connected, all other injectors made idle drop/pick up.
    Although the spark plug might be so fouled that its not firing anymore, but injector still working. Possibilty I guess.
    I'm thinking this is an ECU or wiring fault, rather than an injector problem.

    Fixxxer

  22. #22
    Tadpole
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    Have you tried resetting the ECU? Also, have you checked battery charge? Just a couple of simple/cheap things that come to mind. I see a few ECUs on eBay if you need a replacement.

  23. #23
    Fellow Frogger! kinroh's Avatar
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    I say this out of curiosity. How does resetting the ECU help stop his intermittent fault codes?

  24. #24
    Tadpole
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    Max_A_Buck was on the right track.
    Lots of faults were found in the comms system (CAN BUS?). A battery test found the battery was on the way out (but still had enough juice to start the car).. go figure.

    Replaced battery and the problem has gone away, hopefully for good. Ohh, No.2 spark plug was fouled up, which they cleaned and reinstalled.

    Fixxxer

  25. #25
    sans witticism SLC206's Avatar
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    Quote Originally Posted by Fixxxer View Post
    Max_A_Buck was on the right track.
    Lots of faults were found in the comms system (CAN BUS?). A battery test found the battery was on the way out (but still had enough juice to start the car).. go figure.

    Replaced battery and the problem has gone away, hopefully for good. Ohh, No.2 spark plug was fouled up, which they cleaned and reinstalled.

    Fixxxer
    Hey look at that - another 206 with all manner of problems - solved with a battery change.

    Thanks for posting Fixxxer. I recall suggesting this for another thread just recently but I didn't post on this thread. It all helps for future souls looking for a solution.

    It seems a very common thing with 206/307 - they seem to start fine but run rough. Generally around this time of year the problem starts...
    Regards,

    Simon

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