2.2 hdi anti pollution fault

[phil1976]

Hi im new to the site . Have brought a 406 2.2 hdi 53 plate about a month ago. The anti pollution fault appears and car goes intowhat I believe is a limp mode. I stopped and turned it on/of and it began to run ok again but fault still showed. My mechanic has just fitted a second hand intercooler unit and a new turbo solenoid valve as he ran a diagnosis check on it a few weeks ago and thought these needed replacing. The car ran fine up to coalville from Northampton then half way back fault appeared again. Any thoughts would be much appreciated l. Thanks

[Doggy]

Hi Phil & welcome aboard.

Antipollution Fault is the message generated for any engine/dpf system error. Really needs diagnosing with pp2000. Add your location, someone local may help.

Sounds like you're not too far from me....

[steve_earwig]

Hi Phil What Doggy says really, these engines are very emissions-oriented and pretty much any fault brings up the emissions system defective fault, it's just about meaningless without proper diagnostics.

My mechanic has just fitted a second hand intercooler unit and a new turbo solenoid valve

Best guess here is he has some generic code reader which reported low boost, so he replaced the solenoid and the intercooler because it's what you do. I'm sure I remember reading they usually default high if there's a problem with the solenoid. He could carry on replacing parts until the fault clears or he could diagnose it properly...

[Welly]

That's the first time I've heard an electronic diagnosis call for a new intercooler, there's no sensor to tell you this. The only reason you'd replace an IC is if it was leaking oil.

Anyhoo phil1976 there's lots of really simple fixes available for your model and there's a lot of capable help on here too. These cars are tough so no need to worry that anything serious is wrong.

[phil1976]

Thanks guys. Doggy im in northants over by Milton keynes area. The intercooler was changed due to a leak. I have some codes my mechanic wrote down which his diagnosis machine gave him. Ill get hold of them and post them on here. The car is running ok just got the engine management light on and anti pollution message on display. If I leave the car for a day or so and then start it up the engine management light stays of and then after say 60 miles of driving lights up again and car goes into limp mode until I switch it of and on and then it runs normally again but with engine management light on.
its a lovely drive as I also have a 110 bhp 406 estate which runs fine but obviously not as nice to drive as my newer car. Any advice is truly appreciated guys as I was worried I had purchased a dud car and would have to get rid of it but I love 406s and I drive to france 3 times a year I therefore need a reliable car.

[Doggy]

It may help to post the fault codes, but pp2k will almost always give you more specific information and frequently suggestions for further diagnosis or repair.

PM me if you want to use mine (and maybe see what you can do with a 2.2 after a little, 'optimisation').

[gumby6371]

Hi mate, if at all possible I'd take Doggy up on his offer, it could be something as simple as a split in a vacuum pipe which costs pennies to fix (mine was).
Proper diagnostics with Planet is the next step.

[phil1976]

Hi guys. I have just taken the car to north wales and All sorts of faults came up on display, anti pollution, fuel cap open , abs fault , airbag fault. The car drove ok and when it lagged I stopped left it of for 20 seconds then started again and it drove ok.
got 47 mpg on trip which was good. Just a pity about all the faults ! Lol

[GingerMagic]

Hi Phil, please take Doggy up on his offer - you will not regret what performance and economy combined this model can achieve with a little 'tinkering'....

[oldgit]

hi guys,

I am new to the Forum and hope someone can help me regain my sanity!
I bought a 2001 (Y) 406 2.2HDi Estate about a year ago, and love it and hate it in equal measure. when it runs properly it is a superb vehicle, but it has cut out and left me totally immobile 4 times so far. It seems to be related to fuse 24 under the bonnet, which keeps blowing. i regularly get error messages re DPF, ABS,immobiliser,anti-theft device faulty, fuel filter,fuel flap open, and airbag.

On first occasion my local Peugeot garage replaced fuse 24, the pef temp sensor,and slow speed fan resistor, and forced DPF regeneration.This saved the very expensive renewal of DPF and fluid, but was still few hundred quid!

Each time it fails i find it very scary, as i get marooned, usually in fast traffic.

The AA ran a check during the latest incident and reported:-
P0191- diesel pressure regulator/sensor coherence (int)
P0571- brake light switch earth - permanent
P1447- particulate filter (int)
P1448- particulate filter (int)

They replaced fuse 24 and the car ran for another week, before failing again on a local run. This time the electronic immobiliser light came on. After changing fuse 24, the light went off and the engine started again, but i suspect it will happen again soon.

Sometimes the central door locking goes crazy whilst driving or stationary, and it even locked me out once with the keys in the ignition.

It has now got to the point that i have no confidence in the car, even though i love everything else about it. With Peugeot hourly labour rates of £89 + VAT, I am reluctant to waste more money.

I just hope that someone can give me some advice (and hope!).

Thanks for reading.

[rwb]

What's on fuse 24?

Otherwise a collection of fairly common complaints, more than likely with easy fixes, it's just a case of grasping the nettle!

As above, get a PP2000 session because this gives much more specific information about what is complaining, and this helps work out what's actually wrong -- rather than just throwing parts at it.

DPF: recommendation is to remove it. If you don't to remove it then rather than replace it you can get it cleaned, an independent can top up the fluid, and you'll need a PP2000 session to reset the counters.

Immobiliser is probably the aerial round the ignition barrel. Fault code reading will confirm.

Fuel flap: check the magnets.

Airbag: wiggle the wires under the front seats and if you're lucky that'll keep it away for months. Proper fix is to cut out the connectors and properly join the wires.

Fuse 24 sounds like the top priority though...

[Doggy]

Which Fuse 24? or which fuse box, (the one under the bonnet, or the one inside the car)?

[oldgit]

Thanks,

sorry to take so long to respond but couldn't find my way back to this thread!!

Fuse 24 is under the bonnet. The handbook says it is 10A and covers injection ECU - double coil relay - diesel engine relay - speed sensor - pre-heat unit - water in fuel sensor - and diesel ECU.

Will look for code reader - any suggestions?

Also, my partner's 206 cc 1.6l petrol has started showing ESP warning light in the dash display, which i understand would be an MOT failure? Should we put that query on the 206 Forum?

Would a code reader check her car, as well as other makes of cars?

Thanks again.

[GingerMagic]

Hi, please add your location and maybe someone local to you can do a diagnostic on your car(s) for the price of a cup of tea.....

Removing your DPF is beneficial to the longevity of your car/wallet/sanity and is a very positive step in the right direction.

The 206 may just need to have the ESP reset, if it has had tracking done or hit a kerb.. A diagnostic will pin-point the issue.

A standard reader is fine for troubleshooting but Peugeot Planet ( PP2000 ) is more in depth, will read and clear all faults - past and present - and it is what the dealers use.

[oldgit]

Thank you.

I live near to Sittingbourne in Kent, if anyone is willing to help.

I thought i read somewhere that if DPF was removed the vehicle would fail MOT??

Thanks again.