C5 Anti Pollution Fault Cures !

[lifescape]

Hi posting this just to see if any one on here with more knowledge than i can throw any light on the anti pollution fault on the 2.2 hdi (2002)

It seems i have the same problem as a number of people ie Accelerating from 50ish either changing down or not, beep and anti polution fault appears along with service light. Eventually goes to limp home mode. Pull in switch off and on again and car runs fine although fault still shows. Eventually after stopping fo a while, fault display clears and the last recorded fault doesnt show on the display when cycled through. Fault might not show for few days but eventually returns. ??? Have had new ECU fitted, ok for 3 months, faulted again. A very good citroen dealer did some diagnostics and found the error read as high turbo presure or turbo pressure fault. Tried modding swirl chamber, no effect, tried new EGR valve, cured for 2 months but then returned. Now thinking ECU poss faulty again. Any ideas anyone.......... seems to me to be a sensor or mechanical fault that is caused when accelerating causing the ECU to think there is a anti pollution fault. ANy one know where to look for vacuum pipes that are to do with turbo etc. ?? If any one does find out what this is caused by can they please ring Citroen UK and tell them, as they havent got a clue !!!!

 

many thanks if any one comes up with anything.

 

Mike

[paul.h]

Welcome to the forum.

How many miles has the car done ? I guess you have read many posts here, a common one seems to be replacement of the exhaust particle filter and filling up the eolys fluid.

[lifescape]

Welcome to the forum.

How many miles has the car done ? I guess you have read many posts here, a common one seems to be replacement of the exhaust particle filter and filling up the eolys fluid.

 

Hi there, many thanks for reply to post,

The car has done about 75,000 and had the eolys filled up at 70,000 when i bought it. It also had, at the same time filters fitted which i were told were the Particle filter/s and others ?? but dont know which, as the dealer i purchased the car from had this done for me when i purchased last year. I did see the worksheet and it listed about 3 lots of filters (it wasnt a cheap service either!) Ive tried to reproduce the fault at will by labouring the car uphill and accelerating even dropping down a gear and accelerating hard but cant get it to fault. It usually just happens occasionally. The big problem is if i am using the car to tow my caravan at it does this the limp home mode (ie no accelleration) its a bit daunting with the caravan connected trying to pull over safely. Once i switch off and on again it;ll be ok for a while. any other info would be much appreciated and thanks again for your reply.

 

Mike

[72dudes]

Hi Lifescape,

 

My 2.2HDi has the exact same problem, and we are not alone! Mine was diagnosed back in January as egr valve fault, but I've not had it done because of cost and the fact that I can go weeks without fault appearing.

 

If you've had egr valve replaced and fault still returned then god knows, but I probably won't have mine done at all now!

 

As discussed elsewhere on the forum, when fault appears, you can "hurry up" the disappearance of the message and lights, by switching ignition off, waiting for about 90 seconds until everything shuts down, turning on ignition, repeat 5 times, lock and unlock car, hey presto, no faults! Takes around 7 minutes.

 

I also had turbo pressure switch replaced the first time this message appeared and it also ran fine for 2 months. I get the feeling that even the good dealers/specialist independents are "experimenting" when the car dispalys this kind of fault, i.e. they don't really know! If only the car didn't go into limp mode, I wouldn't bother so much...................

[Guest C5 ESP]

Hi there, many thanks for reply to post,

The car has done about 75,000 and had the eolys filled up at 70,000 when i bought it. It also had, at the same time filters fitted which i were told were the Particle filter/s and others ?? but dont know which, as the dealer i purchased the car from had this done for me when i purchased last year. I did see the worksheet and it listed about 3 lots of filters (it wasnt a cheap service either!) Ive tried to reproduce the fault at will by labouring the car uphill and accelerating even dropping down a gear and accelerating hard but cant get it to fault. It usually just happens occasionally. The big problem is if i am using the car to tow my caravan at it does this the limp home mode (ie no accelleration) its a bit daunting with the caravan connected trying to pull over safely. Once i switch off and on again it;ll be ok for a while. any other info would be much appreciated and thanks again for your reply.

 

Mike

 

 

Mike

 

Have exactly the same problem with my C5 Exclusive 2.2 HDi which I bought in March 2007 (as do the rest !), tow a caravan as well, so I know what you mean when your in the middle lane of a motorway and suddenly the anti-pollution light ESP not working fault comes up and you can no longer accelerate ! suddenly you have HGV's passing you on the inside and up your ars.. My mileage when this started to happed was 74,000

Have had the the car into the Citroen dealers three times now with this fault, but they put on there diagnostic computer and say this is wrong and replace things saying it's fixed, next day it's back !!

1st time they changed the turbo charger electrovalve, 2nd time, detected intermittent fault with high turbo pressure, so they checked all vacuum pipes, blew them through, no leaks detected, 3rd time they said they found the fault as a vacuum solenoid valve was sticking, so they changed that, next day fault was back !

 

I'm reluctant to put int a fourth time as it seems the dealers are doing a lottery of changing this and that not really knowing what's causing the fault ! process of elimination at our expence !! So I agree with others on this forum - Citroen don't really know what the cause is !! But I'm not prepared to spend loads of money while they try to find out !!

 

I've just been doing the ame as every one else, pull over, switch the engine off, wait a couple of minutes, start up and the ESP not working fault clears, leaving the anti - pollution fault displayed, which doesn't bother me so long as I can accelerate again ! problem is that the ESP (Electronic Stability Programme) can get activated by a number of different sensors, problems all related to the anti-pollution fault. I was hoping you could just loop out/short circuit the anti-pollution sensor to get around it, but which one !! looking on other web sites, some say they have resolved the problem by repalcing the air flow meter in the air filter housing (£100 for the part), others the turbocharger electrovalve as has been done with mine, another said disconnecting the sensor on the fuel filter (not sure what this one is !).

 

You can't get a Haynes servicing & maintenance manual for the C5 as they don't do one, but I've sourced through ebay a CD version which apparently all the proffessional mechanics use for the C3/C5, titled C3/C5 Workshop CD (petrol and diesel for year 2000 to 2004) to see if it throws any light, at least be able to see where things are i.e. sensors & not obvious components etc - hopefully !. Just ordered it today, good value at 5.99 including P&P if you want to check it out web link is http://myworld.ebay.co.uk/4095neil since I did a "buy it now", its not showing on his site, he probably does a new copy and puts it back on ebay once one is sold, as looking at his feed back (roys464 - he bought one yesterday), which is positive, so if not showing, you may just need to contact the member and enquire.

 

It's a nice car to drive etc so I'll plod on for now

 

Incidently I've just done a few long runs on the motorway of about 160 miles, then 130 miles, say about four shorter ones of 90 miles and the fault hasn't happened, not saying it's gone away, but it'll be interesting to see how long it goes before it comes back.

 

Agree with the forum - if only it didn't go into sluggish mode .............

 

Bob

[lifescape]

Hi there,

 

thanks for the info re ebay, i'll have alook into that. I did find some info (think the link came from one of the forums) on http://www.citroendata.co.uk/.

 

There seems to be a lot of people with these faults and i cant believe citroen havnt tried to fathom it. If you try and contact Citroen direct they just refer you to there network of dealers. You cant help but feel a little sorry for the dealer service depts as they seem to be in the dark as much as the customers. I am looking into the legalities with regard to citroen not wanting to help with technical assistance, after all they are the only people with the info that could diagnose these faults. I work with electronics engineers who service Panasonic and Sony product and if we get this sort of problem ie more than 2 or 3 of the same reported faults the MANUFACTURER actually will recall a product (if they cant reproduce themselves) to diagnose the problem. After which we get a bulletin with the cure (usually). If only citroen would try this.

 

I'll post again if i get any further with citroen....... watch this space .......

 

Mike

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Mike

 

Have exactly the same problem with my C5 Exclusive 2.2 HDi which I bought in March 2007 (as do the rest !), tow a caravan as well, so I know what you mean when your in the middle lane of a motorway and suddenly the anti-pollution light ESP not working fault comes up and you can no longer accelerate ! suddenly you have HGV's passing you on the inside and up your ars.. My mileage when this started to happed was 74,000

Have had the the car into the Citroen dealers three times now with this fault, but they put on there diagnostic computer and say this is wrong and replace things saying it's fixed, next day it's back !!

1st time they changed the turbo charger electrovalve, 2nd time, detected intermittent fault with high turbo pressure, so they checked all vacuum pipes, blew them through, no leaks detected, 3rd time they said they found the fault as a vacuum solenoid valve was sticking, so they changed that, next day fault was back !

 

I'm reluctant to put int a fourth time as it seems the dealers are doing a lottery of changing this and that not really knowing what's causing the fault ! process of elimination at our expence !! So I agree with others on this forum - Citroen don't really know what the cause is !! But I'm not prepared to spend loads of money while they try to find out !!

 

I've just been doing the ame as every one else, pull over, switch the engine off, wait a couple of minutes, start up and the ESP not working fault clears, leaving the anti - pollution fault displayed, which doesn't bother me so long as I can accelerate again ! problem is that the ESP (Electronic Stability Programme) can get activated by a number of different sensors, problems all related to the anti-pollution fault. I was hoping you could just loop out/short circuit the anti-pollution sensor to get around it, but which one !! looking on other web sites, some say they have resolved the problem by repalcing the air flow meter in the air filter housing (£100 for the part), others the turbocharger electrovalve as has been done with mine, another said disconnecting the sensor on the fuel filter (not sure what this one is !).

 

You can't get a Haynes servicing & maintenance manual for the C5 as they don't do one, but I've sourced through ebay a CD version which apparently all the proffessional mechanics use for the C3/C5, titled C3/C5 Workshop CD (petrol and diesel for year 2000 to 2004) to see if it throws any light, at least be able to see where things are i.e. sensors & not obvious components etc - hopefully !. Just ordered it today, good value at 5.99 including P&P if you want to check it out web link is http://myworld.ebay.co.uk/4095neil since I did a "buy it now", its not showing on his site, he probably does a new copy and puts it back on ebay once one is sold, as looking at his feed back (roys464 - he bought one yesterday), which is positive, so if not showing, you may just need to contact the member and enquire.

 

It's a nice car to drive etc so I'll plod on for now

 

Incidently I've just done a few long runs on the motorway of about 160 miles, then 130 miles, say about four shorter ones of 90 miles and the fault hasn't happened, not saying it's gone away, but it'll be interesting to see how long it goes before it comes back.

 

Agree with the forum - if only it didn't go into sluggish mode .............

 

Bob

[Guest C5 ESP]

Hi there,

 

thanks for the info re ebay, i'll have alook into that. I did find some info (think the link came from one of the forums) on http://www.citroendata.co.uk/.

 

There seems to be a lot of people with these faults and i cant believe citroen havnt tried to fathom it. If you try and contact Citroen direct they just refer you to there network of dealers. You cant help but feel a little sorry for the dealer service depts as they seem to be in the dark as much as the customers. I am looking into the legalities with regard to citroen not wanting to help with technical assistance, after all they are the only people with the info that could diagnose these faults. I work with electronics engineers who service Panasonic and Sony product and if we get this sort of problem ie more than 2 or 3 of the same reported faults the MANUFACTURER actually will recall a product (if they cant reproduce themselves) to diagnose the problem. After which we get a bulletin with the cure (usually). If only citroen would try this.

 

I'll post again if i get any further with citroen....... watch this space .......

 

Mike

[Guest C5 ESP]

Mike

 

All noted, regards the ebay source C5 Manual, forget it. I recieved the CD and it was completely useless, didn't provide any of the information you'd expect in a maintnenace manual like you would get in Haynes, so don't bother to waste your money - thankully it was only £5.99, so as they say, you get what you pay for !

 

Bob

[oncoman]

Mike

 

All noted, regards the ebay source C5 Manual, forget it. I recieved the CD and it was completely useless, didn't provide any of the information you'd expect in a maintnenace manual like you would get in Haynes, so don't bother to waste your money - thankully it was only £5.99, so as they say, you get what you pay for !

 

Bob

 

Hi Guys,

 

I'd like to second that about the E-bay manual. Useless (unless you have the computer to read the codes!).

 

I've got the same problem with my C5 HDi. However, mine got WORSE after we changed the filter and Eolys fluid! We have changed the sensor etc etc. If I can get this thing vaguely running I'm afraid this will be my last Citroen

[Guest Jaxon]

Hi there,

 

thanks for the info re ebay, i'll have alook into that. I did find some info (think the link came from one of the forums) on http://www.citroendata.co.uk/.

 

There seems to be a lot of people with these faults and i cant believe citroen havnt tried to fathom it. If you try and contact Citroen direct they just refer you to there network of dealers. You cant help but feel a little sorry for the dealer service depts as they seem to be in the dark as much as the customers. I am looking into the legalities with regard to citroen not wanting to help with technical assistance, after all they are the only people with the info that could diagnose these faults. I work with electronics engineers who service Panasonic and Sony product and if we get this sort of problem ie more than 2 or 3 of the same reported faults the MANUFACTURER actually will recall a product (if they cant reproduce themselves) to diagnose the problem. After which we get a bulletin with the cure (usually). If only citroen would try this.

 

I'll post again if i get any further with citroen....... watch this space .......

 

Mike

 

Hi Lifescape and apparently hundreds of others!

I have an '03 C5 2.0 Petrol HPI Exclusive. I've had it for 3 months and up to three days ago I've had 9 Anti Pollution faults the last three fairly serious.

Except for the 2nd occurrence at 75mph on a motorway in Ireland the whole thing shut down seconds after the beep and A P Fault then the ESP Deactivated light s came up but within 2 or 3 seconds it restarted itself but oddly ebnough reset itself with the previous Cruise control & Heat settings!! all the rest have been when the engine is under load, 3 - 10mph, 2nd gear, pulling away from a stand.

6th occurrence was queuing on the M50 around Dublin in a solid jam as the M50 is these days I was creeping forward after 40 minutes when it all came on and the engine stopped! Power steering, brakes all died.... no real problem as I'm in a traffic jam. Restarted it ok, fault lights came on and we crept forward as before until it all thinned out and I accelerated up the off ramp and the engine limited itself to 2000 rpm!! No I'm doodling along at about 20mph with cars behind me honking like mad, at least my damn hazard lights worked! I pulled in to a garage about 5 miles away, filled it up with fuel, locked it and paid. Came back reatrted it, it went fine but warning lights stayed on all the way to Castlebar about 145 miles.

Leaving a restaurant in Castlebar, pulling away across a mad busy jct, All warning lights (Anti Polution, ESP deactivated, Little triangular skid symbol) Red SERVICE light came on, engine died suspension sat down power to brakes & steering went. only doing about 10 mph so drifted across the damn jct into a conveniently empty space. Got out in the pouring rain locked it, opened it got back in restarted and again it went ok, but warning lights all stayed on.

Then again on the way home, cruise control on for about 1 hour, lovely drive, stopped at Toll plaza in the 'fast / outside' lane, pulled away and the whole thing stopped and sat down! struggled to avoid the concrete barrier angled in front of me. stopped, got out, locked etc. This is now the 4th time its shut down and sat down at low speeds in traffic, the first time was in a housing estate full of admiring in laws!

After the 3rd occurrence, I had it wired up to Citroen diagnostics in Dublin and it came up with 'Fuel Pressure Regulation Efficiency Drop'. He translated that to mean he wasn't sure but it he'd guess at replacing the fuel pump which on this car is INSIDE the fuel tank. But he said "That will cost you €721, so I'd hang on and see if it becomes serious!"

 

Well guys, I think its becoming serious!

 

Lovely car to drive but seriously flawed! If you throw Anti Pollution fault into Google there are thousands of occurences and like a previous correspondent, I'm surprised Citroen wont stand over this bit of software. I might well, as suggested replace the pump at €1,000 (€721 + labour) and for all anyone knows, it may well be perfect, until the fault comes up again. Citroen don't really know!!

 

Love the car, but I'm losing faith in it.... Will it get me across the busy jct or will it sit down half way round the roundabout in dense traffic..... Can't really be doing with it.

 

Got it signed in To another Diagnostics check on the 22nd October 07.

 

Anyone any ideas? I'd be interested to hear opinions. Anyone from Citroen Tech Dept read these messages?

 

Look forwards to it all....

 

Roy

[Guest Jaxon]

Hi posting this just to see if any one on here with more knowledge than i can throw any light on the anti pollution fault on the 2.2 hdi (2002)

It seems i have the same problem as a number of people ie Accelerating from 50ish either changing down or not, beep and anti polution fault appears along with service light. Eventually goes to limp home mode. Pull in switch off and on again and car runs fine although fault still shows. Eventually after stopping fo a while, fault display clears and the last recorded fault doesnt show on the display when cycled through. Fault might not show for few days but eventually returns. ??? Have had new ECU fitted, ok for 3 months, faulted again. A very good citroen dealer did some diagnostics and found the error read as high turbo presure or turbo pressure fault. Tried modding swirl chamber, no effect, tried new EGR valve, cured for 2 months but then returned. Now thinking ECU poss faulty again. Any ideas anyone.......... seems to me to be a sensor or mechanical fault that is caused when accelerating causing the ECU to think there is a anti pollution fault. ANy one know where to look for vacuum pipes that are to do with turbo etc. ?? If any one does find out what this is caused by can they please ring Citroen UK and tell them, as they havent got a clue !!!!

 

many thanks if any one comes up with anything.

 

Mike

 

Hi Mike,

 

I just put up a long account of this problem (see below), but when I had it hooked up to to Citroen diagnostics it came up with 'Fuel Pressure Regulation Efficiency Drop'. The mechanic suggested it was the Fuel pump, ("but as I'm not too sure, that's what I'd start with....") That would be about a grand! (€721 + labour). It isn't fuel, My 9 occurences have been spread over Very low fuel to almost full, it's not speed related, 8 of them have been between 3-10 mph. 1 at 75mph. Doesn't matter what gear you're in. As the on board system re sets itself when you start the car, it takes at least 2 restarts to clear the warning lights. Ongoing I'm afraid... But worryingly it has stopped, shut down all systems and sat down 3 times. Once in a quiet housing estate, once across a busy 4 way mini roundabout and once at a toll plaza.... *sigh* It's in for another 50 quiid diagnostics on the 22nd.....

[Randombloke]

Anyone any ideas? I'd be interested to hear opinions. Anyone from Citroen Tech Dept read these messages?

 

No they do not.

 

You are better off sending all the stuff to the Consumer's Association, or Watchdog.

 

If the situation got worse after the Eolys/DPF(also referred to as FAP) change at 75k then there is a chance that the procedure was not done correctly.

 

This is the one reason I've been told by my local Citroen repairer to always check the DPF/Eolys change record when buying second hand. If there is no record of it, then I was told to simply find another car, and if I bought against their advice, to get it serviced elsewhere.

 

I would recommend buying any FAP/DPF equipped car before the first change. Yes, it costs more, but then you are sure of where and when it was done.

 

I've been told that having the service done with less than 3/4 of a tank is a good idea and that after the change to go straight to a garage and put at least 10litres of fuel in the tank.

 

Sorry I can't be of more help.

[Guest ralf]

Anyone any ideas? I'd be interested to hear opinions. Anyone from Citroen Tech Dept read these messages?

 

 

Roy

 

 

Likewise, I have the same fault. 2.0 HDi 2003. Citroen have no idea what it is. Damn dangerous when it suddenly goes into rev-limit mode when you are not expecting it.

 

I wondered if it was the lambda sensor, and wanted to replace it to see what happened, but the local garage says there is not one on the C5 diesels. Is this correct??

 

 

Ralf

[lifescape]

Likewise, I have the same fault. 2.0 HDi 2003. Citroen have no idea what it is. Damn dangerous when it suddenly goes into rev-limit mode when you are not expecting it.

 

I wondered if it was the lambda sensor, and wanted to replace it to see what happened, but the local garage says there is not one on the C5 diesels. Is this correct??

Ralf

 

Think the Lambda sensors are on petrol engines (???) only.

Just heard back from citroen again (2nd time) and guess what they say.......

 

take it to a dealer and they will sort it (LOL)

 

tried again to say that this inherrent fault on the majority of c5's is a citroen problem and they should sort it. If you own a Sony CTV and it has the same fault as only a few others, ie its not a one off, sony will eventually work a fix for it and publish it to all dealers. Shame citroen dont do this.

 

Next stop watchdog.

 

PS if every one keeps adding to this i'm sure watchdog will be interested.

 

PPS forgot this but citroen have a PREMIUM RATE (£1.50per min) tech help line so they have told me in the last email.

if any one wants to waste a few hundred quid let me know and i'll list the number !!!

 

Mike

[Guest H19SNS]

Just bought a 51 plate C5 98K miles and had the same Anti-Pollution fault; It used to go into Limp Home on accelerating hard. Took it to a local Citreon approved repairer who diagnosed the fault: New fuel Ecu, apparently if some of the early ECU's are not reset before they reach their max count, they cannot be reset and thus the ECU needs replacing. New Particle filter and fluid. No problems with service lights or anti-pollution faults thus far. £498 total.

 

I also cleaned the EGR return pipe that attaches to the inlet manifold, this was solid with black carbon;

 

It is a shame the OBD functions cannot be accessed and reset by a cheap COTS product.

 

:rolleyes:

[Guest ralf]

I also cleaned the EGR return pipe that attaches to the inlet manifold, this was solid with black carbon;

 

:)

 

 

Ok - problem solved at long last, and by the local garage, not the Citroen dealer.

 

Like the above, the EGR return pipe was clogged, and the system showed a fault in the inlet air-valve. Both were replaced and now the car goes better than new, with no faults and better mpg too.

 

So why could the Citroen dealer no fix this? This board (and the equivalent Renault board) demonstrates that this is a common problem with the HDi engine, so why does Citroen not have a clue?

 

 

Ralph

[delon]

Just bought a 51 plate C5 98K miles and had the same Anti-Pollution fault; It used to go into Limp Home on accelerating hard. Took it to a local Citreon approved repairer who diagnosed the fault: New fuel Ecu, apparently if some of the early ECU's are not reset before they reach their max count, they cannot be reset and thus the ECU needs replacing. New Particle filter and fluid. No problems with service lights or anti-pollution faults thus far. £498 total.

 

I also cleaned the EGR return pipe that attaches to the inlet manifold, this was solid with black carbon;

 

It is a shame the OBD functions cannot be accessed and reset by a cheap COTS product.

 

;)

[shallishanti?]

To say "Citroen does not have a clue" is like saying "all Citroens are crap" which they certainly aren't.

 

Perhaps the technician at the dealer in question is unfamiliar with this problem. Another dealer may have rectified it straight away.

[delon]

Hello all I recently bought a c5 2.2 exclusive es could find no record of oo fluid being topped up so went to my local Citroen dealer and asked about top up. He told me that the fluid was very expensive and that on early C5 models the chances were that the ecu would not reset even if the part filter were changed so basically not to bother as I could let myself in for a big bill for no reason he reckons that it should not affect the running of the car and the only problem may be that the emmisions could be a little high at mot time. Can any one tell me if this is right or wrong info. I have to say that I have known this dealer for many years and he has never steered me in the wrong direction before. I have had Citroens from 1994 and generally am delighyed with the comfort economy etc but this bloody particle filter thing is really worrying me. Can any one give me some pointers.

[delon]

Hello all I recently bought a c5 2.2 exclusive es could find no record of oo fluid being topped up so went to my local Citroen dealer and asked about top up. He told me that the fluid was very expensive and that on early C5 models the chances were that the ecu would not reset even if the part filter were changed so basically not to bother as I could let myself in for a big bill for no reason he reckons that it should not affect the running of the car and the only problem may be that the emmisions could be a little high at mot time. Can any one tell me if this is right or wrong info. I have to say that I have known this dealer for many years and he has never steered me in the wrong direction before. I have had Citroens from 1994 and generally am delighyed with the comfort economy etc but this bloody particle filter thing is really worrying me. Can any one give me some pointers.

sorry I failed to say that my car is a 51 reg with 67000 on the clock

[Randombloke]

He told me that the fluid was very expensive and that on early C5 models the chances were that the ecu would not reset even if the part filter were changed so basically not to bother as I could let myself in for a big bill for no reason he reckons that it should not affect the running of the car and the only problem may be that the emissions could be a little high at mot time. Can any one tell me if this is right or wrong info.

 

I would say that the info is wrong. AFAIK early C5s with DPF (filters) needed these changing at 50k. This can be determined from RPN/ORGA and it must be done. Iannez or kfk know more about this than me but I would be worried and would probably visit another 2 dealers and ask them.

 

Alternatively, ring Bollingmores in Middx and find out what their opinion is. Before making any calls have the RPN/ORGA number to hand so those you are asking can find when your car was made and how often it should have the DPF changed and the Eolys fluid topped up.

 

It is the case that if your car is not a 50k DPF change then it's definitely 75k.

 

When the particulate filter gets clogged it does affect the car's running and eventually AIUI the car will go into "limp home" mode.

[Guest Trident]

Ok - problem solved at long last, and by the local garage, not the Citroen dealer.

 

Like the above, the EGR return pipe was clogged, and the system showed a fault in the inlet air-valve. Both were replaced and now the car goes better than new, with no faults and better mpg too.

 

 

Ralph

 

I've recently had the same problem with my 52 plate C5 exclusive petrol automatic. Having recently bought it, I was disturbed to see the warning regarding engine anti polution system fault. The garage I bought it from (independant) took it in, and fixed whilst I waited.

It was a blocked EGR valve (and presumably a blocked pipe)

[Randombloke]

I have also had an "Anti Pollution fault" warning recently.

 

It was traced to the Swirl Chamber control valve.

 

Replaced and all fine.

[Guest pburns]

Ok - problem solved at long last, and by the local garage, not the Citroen dealer.

 

Like the above, the EGR return pipe was clogged, and the system showed a fault in the inlet air-valve. Both were replaced and now the car goes better than new, with no faults and better mpg too.

 

So why could the Citroen dealer no fix this? This board (and the equivalent Renault board) demonstrates that this is a common problem with the HDi engine, so why does Citroen not have a clue?

Ralph

 

Hi Ralf,

Could you tell me how to find the EGR return pipe and the inlet air-valve as I am having the same problem.

 

Thanks,

Paul

[Aunty Polly]

Aunty Polly by name Anti Pollu by nature!

 

Like many I have the dreaded ESP/ASR Anti Pollution fault on my 01 C5 2.0 HPi.

 

I've only owned it 5 months and am wondering after reading all the feedback here and elsewhere whether I've bought a Citroen White Elephant Estate!

 

Anti Pollution displays along with engine light and service warnings followed quickly by ESP/ASR message. Engine cuts straight away absolutely no torque at all, doesn't even limp! Like others it scared me witless first time but now fast fingers and a bump start mid drive keeps me out of trouble but I won't let anyone else drive it because of the inherent dangers.

 

Has anyone seen any common denominator in the fixes yet. e.g. Changing a partcular sensor

 

Can't we somehow gang up on Citroen? Surely they have a duty of care to us as owners. When a product becomes dangerous surely they have some kind of legal obligation, even if it's only to publish the cure to dealers so they can get the benefits of the service charges?

 

Come on gang! How can we make this snowball??

 

Yours shakily and bump startedly

Aunty polly