Anti pollution fault, Peugeot 307

I'd say it is just a case of being complicated to the point of uselessness.
There probably is no fault or a sensor isn't warming up or a joint is bad or somesuch.

A year or so back there was some minor fuel contamination in Tesco's petrol which contaminated the sensors in a load of cars causing the engine management systems to go into some stupid mode. Classic case of a 'non problem' wreaking havoc...
Give us simplicity any time.
My advice...ignore it... You will probably do more damage to the environment and your wallet by getting a garage to replace loads of perfectly sound parts before they decide there is nothing wrong and it's a 'feature' .

Oh my what a cynical cat I am .

Del (PS I'm willing to be shot down on this)

Del the Cat has probably given you the purrrfect answer in that it is nothing serious to worry about. Unless the warning light is red and comes on to stay on, what ever the condition is, it is not serious. When the light flickers and goes out, it is a temporary condition and most likely not doing any harm to the motor. One item many ignore that I have seen cause this type of issue is a dirty air filter and a dirty mass air flow sensor.

However, if that isn't the problem and you still you want to figure out what is causing the light to flicker, you are in for a bit of a job. The first thing to do is isolate the circumstances. When did the light begin to flicker? Does it do it mostly on start up or just first thing in the morning? Does this happen after you fill up? Do you fill up at the same staion all the time. Do you do stop and go driving or are you a distance commuter. The list can get quite lenghty

Once you feel you have enough data to consistantly predict when the flickering will occur, you will also have enough data to eliminate external things like fuel quality, air flow and exhaust flow. Then you have to start eliminating the sensors the engine uses as well as the various pressrue control valves in the fuel system.

Or you could take it to your dealer and tell him the problem and write FTFT on the work order which in translation means Plese fix my car, I am leaving you a blank cheque to motivate you.

It is much easer to just ignore the flickering, take reasonable precautions by checking the obvious (like the air filter) and waiting until the light comes on full time so the dealer can then sort the problem out.

"purrrfect".... arrghh....

You did not list your country you live in. Than can easily be done in your profile, and that will allow that information to show whenever you post.

If the car is North American manufactured, a simple code scanner will tell you what the computer has seen as a problem. These can be purchased in many chain type automotive parts stores for about $50. If not NA. there must be some way to ask your computer what it thinks is wrong. These computers remember every time a engine control warning light comes on.

If all else fails, you might try reading the owner's manual. They usually tell you what each light means. You might get some clues. Good luck.

I agree checking the error codes with a OBD-II scanner is the first thing to do. AFAIK if it is fairly recent it should be OBD II compliant even if it is not North American. So he might have some luck with his French Peugeot.

The car is 2003 but diesels did not have to be OBD compliant until 2004 so it I can't use OBD 2.

I hav'nt had fault for abour 10 days, the Peugeot mechanic said to go for a long run in it so maybe that cured it.

Thanks for all the help

Try to keep track of the circumstances when the fault light comes on. If the self diagnosis system can not be made to give up it's secrets, tracking down the fault will require controlled conditioned to avoid throwing a load of parts at this fault.