Depollution system fault, Peugeot 307 HDI, 2006
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  1. #1
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    Default Depollution system fault, Peugeot 307 HDI, 2006

    This car...!!!

    I've spent over $3500 on it this month alone, so a little tired of it. Just had the clutch replaced, including new dmf - I mean just. Drove out from the mechanic (who had to find the loose bolt on his repair that was leaking oil) and 100m down the road the engine light came on with "depollution system fault". Going to check the codes with him tomorrow.

    I know this could be any number of things and I'm not holding my breath that it will be cheap.

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    Can anyone recommend a Peugeot/diesel mechanic able to resolve this problem for me please. I'm in the Sydney area (Blue Mountains actually). I've used Colliers before, on our old 505 and wonder if he's still the best bet.

    Thanks.

  2. #2
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    Driving off with an instant fault after that much dismantling suggests something not refitted correctly, such as a sensor. If so, a computer read should locate it. Colliers can certainly attend to that sort of thing.

  3. #3
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    I'm told nothing knocked by mechanic. He reset the error and drove 20ks with no problem, I drove 10 and it came back again. Had to drive to Sydney which worked but I'm concerned about doing more damage.

    Error codes from the mechanic's generic scanner are P1351 (which it's always had) and P1457.

    Christmas is upon us so I guess I'm without a car until mid Jan unless someone can advise a simple resolution (oh, I hear your sniggers).

  4. #4
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    Looking up the codes--
    P1351 Relais de préchauffage : test de cohérence (contact ouvert)
    Défaut électrique sur la commande des bougies de pré-chauffage : Circuit ouvert sur batterie
    Open circuit on glow plug control (hardly needed, except in a Blackheath winter)

    P1457 Catalyseur DeNox : catalyseur absent
    FAP absent, Défaut informant l'APV ou le Conducteur qu'un.
    Nettoyage du FAP est nécessaire (basé sur la charge en cendre du FAP et la distance parcourue depuis le dernier changement FAP)
    DPF cleaning is required

    This last is a depollution matter. The pressure sensors are fitted to tubes behind the engine coming from the exhaust fllter. If it really is blocked (not sensors accidentally disconnected) and the car can attain usual speed, it urgently needs a fast expressway run to regenerate the filter. The engine won't create regeneration temperature during short run urban-type driving.

    It is possible for a mechanic with the PSA software to cause a regeneration in a stationary vehicle - an alarming spectacular event best done outdoors.
    Last edited by seasink; 24th December 2015 at 08:26 AM.

  5. #5
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    Hi. Had a similar problem with no Turbo Boost after the Cam Belt change. When I had removed the starter motor, I had disloged a vacuum line. Have a good look around for any dangling hoses. In another post they had a similar problem also with a vacuum line split and leaking.

  6. #6
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    I did a fast run yesterday and no regen! Perhaps it has no Eloys fluid. Tried to eyeball the reservoir while it was up on the hoist but couldn't find it.

    Going to have a poke around today and see if I can see anything obvious.

    Any thoughts on putting some fuel tank regen additive as a stop gap? Is this a bad idea?
    Last edited by paulsmithx; 24th December 2015 at 11:56 AM.

  7. #7
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    The Eolys reservoir is near the fuel tank and is covered. When it reaches minimum (around 150,000 km) it has its own error message on the instrument panel.

    Have a good look, particularly at the pressure sensors tucked out of the way. If the car has gone too long without a good solid regen you may need to either have a forced regen, or else have the filter physically cleaned, a nasty job as cerium (Eolys) is dangerous. Specialist diesel and Peugeot mechanics are familiar with this problem.

    Lockwood116's post may apply if you have severe loss of performance, but vacuum faults have their own fault codes.

  8. #8
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    Can anyone let me know where the pressure sensors are on the car please (tucked away?)? I've had a quick look underneath and can't see anything obvious (it's the 307 2.0HDI - HRHR).

    It does seem very strange that it's suddenly appeared with no other errors since a major repair was done. Most of my driving is on the open road - so regen should be relatively recent I would have thought. Is there any indication when a regen is happening?

    Thanks for your patience.

  9. #9
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    They are always in no-man's-land at the back of the engine. I'm a Cit man, but I think the 307 has the exhaust DPF pressure sensor under the battery area where it may have been disturbed. There are two tubes and a plug.

  10. #10
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    I'm going to climb underneath tomorrow for a bit of (non invasive) exploratory surgery. A couple of questions:

    1) Has anyone a copy of the Haynes for the hrhr and could send me the few antipollution specific pages please?
    2) If I disconnect the battery is there anything needing to be done to the computer on reconnection?

    Thanks again,
    Paul

  11. #11
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    I don't have a P307 to peer under, but the sensor is findable at the back on RHR engined Citroens. Is this video appropriate for your car https://www.youtube.com/watch?v=4TcEzX1Uyuw? The camera zooms in on it.

    I looked up the Revue Technique manual for the diesel 307, and there are no instructions for the exhaust pressure sensor. I don't have a Haynes.

    Follow the instructions to the letter disconnecting a 307 battery, or you wlll need black magic at the least to get the computer back in sane mode and the car startable. The computer (normally always on) must go to sleep correctly.

  12. #12
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    Well a small investment in tools and a few hours later I can't see anything wrong except for a vacuum hose that seems possibly to have come loose from it's mount en route to the sensor, and a disturbing number of loose bolts, a continuing oil leak - although perhaps I found that one and tightened up the rogue, and a stray bolt from the recent clutch change - a bit of a worry.

    I did however discover the sensor in the same place as the video - attached to the master cylinder, visible after removing the battery tray.

    So I guess next thing might be to check the pressure on those lines and somehow to check whether the sensor is functioning correctly, I guess I could just replace it. At least I know that part won't be overly complicated.

    Fun, fun, fun.

    Thanks for the input gents.

  13. #13
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    Can someone please help me with a replacement part number for the pressure sensor? Any experience with using non genuine?

  14. #14
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    Have you tested it? Most sensors range from .5v to 5v for a pressure difference 0 to 100 kPa. The sensing element is a membrane between each pressure input -
    The sensing element of the Exhaust Gas Pressure Sensor is a piezoresistive on in a Wheatstone Bridge configuration. This sensor is basically changing its electrical resistance upon mechanical deformation of the membrane.
    The required electronics are embedded within the unit.

    Description here - http://www.vdo.com/media/182673/flc_...ent_eng_en.pdf

  15. #15
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    No, I must confess I haven't. Don't have equipment, or skill. I had read it was a common point of failure though, and now having read more on dpfs and the potential for holes etc probably best to wait a couple of weeks until I can get it to the mech.

    School holidays without a car is driving bad decisions.

  16. #16
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    My local mechanic asked for the car back to check over everything again. He did that and reset the codes. If there's still a problem it will no doubt reappear within 20kms as it did previously. Let's see. I indent to take it off to Colliers for upcoming services anyway.

    I'm thinking in probably worthwhile budgeting for replacing or cleaning EGR, and DPF over the next 6 months so on to the next question - I've called Western Filters today to ask about having the dpf cleaned and they've told me $750 including postage. Has anyone used this service and would recommend this over a new after market import from the UK?

    Also a replacement EGR, or cleaning?

    Thanks for your thoughts.
    Paul

  17. #17
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    Good old Colliers!

    Replaced the sensor and hoses, cleaned out the dpf and ran a manual regen.

    Good as gold! (for now haha - nervous laughter)

  18. #18
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    Well done. That's more fun than cracker night - I wish I had been there!

  19. #19
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    I had a similar problem when I bought my 307 2L HDi in 2006 - right from new. Several trips into the Peugeot dealer showed no problems and they did several resets - all to no avail. My display showed an Anti-pollution error but the engine was unaffected in its performance.

    It was only through this forum that I found someone who had similar problems and that took him about 6 months or more to resolve when he found a mechanic who knew something about diesel pugs of this model. It turned out to be caused by a faulty exhaust differential pressure sensor. When I told my dealer to change this sensor they did so and that fixed it. So far I haven't had any other problems - but then again my Pug has only done 41,000km in 9 years. It is getting a lot more use these days as my other car - a 1993 Mazda 626 V6 - went to the big Mazda graveyard in the sky as a result of a stupid driver going through a red light and turning across my path a few months back.

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