Engine anti pollution system defective - 2006 Peugeot 604

If the anti-pollution light on your Peugeot 207 VTi is on, it usually indicates a problem with the vehicle's emission control system. This light may appear in different ways, depending on the model and year of your vehicle, but it usually looks like a picture of an engine with "check" written on it.
Here are some steps you can take to address this issue:

1. Check the gas cap: A loose or damaged gas cap can cause the anti-pollution light to come on. Make sure the gas cap is tightened securely and that it is not damaged.
2. Check the oxygen sensor: The oxygen sensor is responsible for monitoring the level of oxygen in the exhaust and adjusting the fuel-to-air ratio. If the sensor is damaged or malfunctioning, it can cause the anti-pollution light to come on. A qualified technician can diagnose and repair the sensor.
3. Check the catalytic converter: The catalytic converter is responsible for converting harmful pollutants into less harmful gases. If the converter is damaged or malfunctioning, it can cause the anti-pollution light to come on. A qualified technician can diagnose and repair the converter.
4. Check the air filter: A dirty or clogged air filter can cause the engine to run rich, which can lead to increased emissions and the anti-pollution light to come on. Replace the air filter if necessary.

If none of these steps solve the problem, it is best to consult a qualified mechanic to diagnose and repair the issue

engine ecu has fault codes to be read

several parts and sensors cover anti polution problems

The primary purpose of the Service engine light is to indicate there is a problem with the anti-pollution/ smog system.
If your vehicle is a 1996 or newer model, it comes equipped with an On-Board Diagnostics System (OBD II). This system is designed to catch emissions problems.
OBD alerts you to conditions that waste fuel, shorten engine life and result in potentially expensive repairs.
OBD lets you know your vehicle is contributing to unhealthful air by emitting excess pollutants.
The OBD trouble codes can help in diagnosing the condition, but do not always point to the cause.

Is there any fault indication on the dash where the radio display is.
Anti pollution is basically citroens way of saying emissions system so it could be as simple as a loose emissions pipe but from what you say and the car does not run it could be your catalytic converter (part of the exhaust system) has failed causing the engine management system to cut in and protect the engine.
If there is no fault apart from anti pollution showing in the radio display find someone with a diagnostic machine to give you a better idea of the fault. Hope this helps a bit.

Have someone read the codes. check for any damaged vacuum hoses or electrical connectors left unplugged

Anti pollution light, I never heard of a Check engine light being called that.
Read on please.

Hello
When the service engine soon light (Also called the check engine light or engine management light) is turned on this is to alert you to the fact that Powertrain Control Module (computer) has detected a failure somewhere in the systems it controls you may not feel any difference in the way the engine runs, this can be the transmission or the engine or emission system, there are fault codes set in the modules memory for these faults. What needs to happen now is to have the powertrain control module scanned with a special tool called an OBD2 electronic engine control scanner or a OBD2 code reader. Once the code(s) are read then you must perform the diagnostics for each code and make the appropriate repairs based on the findings of the diagnosis that was performed, this is called doing "Pinpoint" testing.

I had a problem with "Unblock diesel filter and Anti-pollution fault". After reading a few answers for this I decided to take car into the mountains for a good workout. Usually my trips are short and often therefore the exhaust was not getting hot enough to burn off the diesel residue in the Particle filter. In 40 mins of 3,5000 revs mainly in 3rd gear nothing showed up on the computer. Think this problem is sometimes caused by the engine not getting hot enough for long enough.

COULD INSTALL AIR FILTER IN WRONG OR LEFT SOME THING ELECTRICAL DISCONNECTED AFTER INSTALLING NEW AIR FILTER. COULD NEED SCANNER TO ERASE CODE AFTER REPLACING AIR FILTER.

If the Anti pollution warning light is coming on the possible causes are endless. If the car is driving ok then that is a good sign, but please remember that modern management systems can mask problems quite well. The safest advice is to get it looked at and see what fault codes are appearing and then a diagnosis can begin, as leaving it is not going to be a good thing, it can go from a minor problem to more serious issues. At least the light is not flashing, which usually means an emission compliance problem and even more serious, but even so I would advise protecting your vehicle by getting it checked out as soon as possible to avoid potential damage.
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A fault in the ignition can cause an engine misfire and unburnt fuel gets into the exhaust causing the anti-pollution light to be triggered.

Check the ignition system for signs of damp or loose connections.------- I suggest get the car scanned at autozone service center.Its absolutely free to get car scanned.This will show the problem if you receive the error code.-------- Thanks.Helpmech.