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My 'Anti Pollution Fault' *FIXED* HDI 110

spoon138

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Joined: Aug 21, 2010 Posts: 5 Posts Left: 0
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What Peugeot do you own?: 307
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Age: 32
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Insurance renewal month: January

PostPosted: Mon 04 Oct, 2010 5:55 pm Reply with quote
Applies to my 2.0HDI 110  on 03 plate.  (307 SW SE)
Just thought id share my anti pollution fault experience on here incase it may help others with similar symptoms as we all know anti pollution can be so many things.

It started with diesel additive min level warning , a few weeks later followed by 'Anti pollution Fault' and the management light on the instruments.
Initially i took the car back as it was within 3 month warranty and let them sort it which they did. They topped up the additive tank and did a forced regeeration and reset all counters which seemed to do the trick.
For a while at least.

I always fill up with bp ultimate but got caught short one day and had to put a fiver of less than decent fuel in which prompted the car to regen upon driving.
I had to stop(bad idea).

The following day you guessed it i had anti pollution fault again.
The only thing i thought was that perhaps it would clear with some more ultimate but the weeks passed and it didnt and i was living in limp home mode(restricted revs to around 2500-3000).

My first undertaking was to clean the FAP/DPF filter as i thought perhaps the forced regeneration wasnt enough to clear it properly. I followed one of the many guides floating around and washed the rear section (front part being the CAT i believe) of my filter, taken from under the car, at work where i had access to correct waste disposal, wash faciltiy.

Refitted hoping the faults would clear but they didnt. adamant nothing else could be wrong i called the rac and convinced them to read and reset my codes.
faults were:
P1447 DPF clogged /blocked or just plain broke  (NOTE this fault wouldnt clear on scan tool however once the car went to sleep it was cleared upon restart)
P1425 Temperature sensor voltage too low ( or words to that effect)

Foolishly  I chose to ignore the P1425 thinking it may be something and nothing or related to me unplugging the temp sensor in the dpf.
I thought id cracked it. The following day i thought it was okay until i started to boot it. once i exceeded a certain speed/revs the anti pollution fault and management light flagged again.

I did some digging elsewhere Eurovan site i think mainly and came across someone else with a recurring anti pollution when they booted it. Turned out they had this P1425 code also. Seems this is actually caused by the differential pressure sensor being faulty. A common fault by all accounts.

I got one from Peugeot at around 40 inc VAT. Fitted it. Obeying the 3 min rule (remembering to open the bonnet first). Pretty simple to fit: remove top cover of air filter box/ remove battery / remove Rear battery tray plate (simple just requires torx-type screwdriver). Sensor is  bolted to the brake servo has two hoses and one electrical plug. (the hoses coming from the dpf, just to note there seems to be nothing sensor wise in the FAP/DPF for pressure just two open hoses/ pipes that run to this sensor behind the battery).
The replacement sensor differed slightly to the original and i was led to believe it was' improved' and that they sold loads. however it retained the same connections.
PART 1618Z9

Refitting was simple just required some small jubilees as the original clips from the hoses were not reusuable in my instance.
NOTE TO ENSURE CORRECT HOSE CONNECTION: One hose has a white stripe /markings on the end , this corresponds to a small white blob on the old sensor  above the relevant tube to connect.
on the new sensor there is a white sticker with a white square drawn above the relevant connection.
plug eletrical plug in.

Put it all back together.....Called the RAC again got them to reset it both faults being there again.

1000 miles later of  both town and motorway driving and im still clear. (thank god).

Anyway hope this helps some people.
remember anti pollution can be many things and varies from model to model (engine-wise)
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Re: My 'Anti Pollution Fault' *FIXED* HDI 110

Driloni

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Joined: Feb 20, 2016 Posts: 1 Location: Kosovo Posts Left: 4
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PostPosted: Sat 20 Feb, 2016 10:58 am Reply with quote
Hi, I have the same problem with my 307 110 hp (2003) anti pollution fault came in. I sent it to clean dpf, they cleaned it, but one day after, i was driving more then 110 km/h,
anti pollution fault came in again. i sent it for diagnose and there are two erros: One is differential pressure sensor and the other is air flow meter.
So i want to know if the "air flow meter" was the problem to you too.
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Re: My 'Anti Pollution Fault' *FIXED* HDI 110

zedhead

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Joined: May 03, 2016 Posts: 1 Posts Left: 4
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PostPosted: Tue 03 May, 2016 7:54 pm Reply with quote
Very Happy  Very Happy  Very Happy  cheers for this post. After pulling the dpf off to clean it I found it was quite clean. Checked out the pressure sensor after reading your post and found one side was blocked with soot. Replaced it with the same as you bought and reset the engine light with pp2000. FIXED !!!! Thanks again
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Re: My 'Anti Pollution Fault' *FIXED* HDI 110

zed-head

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PostPosted: Sat 19 Nov, 2016 5:14 pm Reply with quote
I had the dreaded anti pollution fault and limp mode on my wife's 307 lately. I replaced the pressure sensor in the summer when it first happened. there was crud in one of the tubes which I cleared and took the FAP off the car and jet washed it . TBH with hindsight , the FAP was pretty clean and not the problem. I reset the fault with pp2000 and all was good. The car started coming up with 'clean diesel filter' intermittently late summer along with ABS/ASR fault. The ABS was fixed by taking off a rear brake sensor after my friendly Kwik Fit man diagnosed the offending corner as pp2000 would not help on this. Cleaned the rust , put a washer under the sensor so it san within a hairs distance from the wheel and the fault went. The clean diesel filter degenerated to anti pollution and limp mode!!!  I checked the hoses at the pressure sensor end and all were clear. I ruled our the sensor as it was new 6 months ago but bought one as a just in case . I got under the car today with intentions on removing the FAP again. as i was prizing off the rubber hoses , one seemed to spin around. On closer inspection it became clear that the rubber hoses are about 10 inches long at the FAP end and joined to rigid plastic hoses with spigots which then go up to the sensor behind the battery and have rubber hoses at the other end here too. I fished out the hose to discover that the bottom section of one of the rigid hoses had melted along with it's spigot joining the rubber hose which attached to the FAP. It looked burnt . This was obviously the reason for the fault as the sensor was not reading pressure from both tubes. A quick trip to the breakers yard and acquisition of rubber hose , I reconnected without a spigot by pushing the rubber hose over the now shortened rigid plastic hose after the burnt section was cut out. Was a snug fit . Reset the fault with pp2000 and job done. Have to say pp2000 is bloody temperamental but got there eventually. Took the car out for a blat gingerly building revs and speed and all seems well.

Well chuffed.  Very Happy
I was wondering why the plastic tube and spigot was burnt. Can only imagine it might have something to do with the fact I used carb cleaner down the tubes to clean them and it didn't clear or flush thoroughly and the heat from the exhaust and gases may have burnt it????  

Mad
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Re: My 'Anti Pollution Fault' *FIXED* HDI 110

zed-head

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Joined: Nov 19, 2016 Posts: 2 Posts Left: 3
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What Peugeot do you own?: 307
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Insurance renewal month: January

PostPosted: Tue 22 Nov, 2016 6:55 pm Reply with quote
So,,,,,,,,,,,,,,,,,,3 days after fixing the car , I had a tect from my wife saying the Anti pollution fault had returned  Evil or Very Mad  Evil or Very Mad . Not happy. She returned from work so I set about checking the car out. I was horrified to find my fix had not worked, The 'rigid' plastic tube which runs up the bulkhead with the rubber ends connecting dpf and pressure sensor had melted again. This is a bit of a worry. I took the dpf off and jest washed both parts and refitted. I removed the remaining piece of pipe joining the dpf and sensor and replaced it with rubber hose all the way (fuel hose). I reset using pp2000 and all seems ok at the moment. Using global check pp2000 also suggests the fuel additive system is ok too.

Why is the plastic pipe melting. I thought maybe the pressure is too much and heated gases had travelled up the pipe and melted it. Upon removing the pipe at the sensor end I found the short rubber hose had split just below where the jubilee clip went on. Did the split cause the heated gases to travel up the pipe?  The filter seemed not too bad in terms of soot also....Don't know.... we will see how the next few days go. I have a sensor on standby in case I fry the current one. I can remove the battery and dpf blind folded now Laughing  Very Happy  Shocked  Confused
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