depollution system faulty fix

[peugeot308sw]

I have a 2010 Peugeot 308 SW and for about a year now I have been getting the "depollution system faulty" message and the orange engine trouble light. I went to both the official Peugeot repair shop and an independent (highly recommended) repair shop here in Athens (Greece) and both ran diagnostics, telling me that the problem was bad gasoline and that I should put 100 octane gas from now on. They reset the display to get rid of the warning and sent me on my merry way. I tried the 100 octane approach repeatedly from various gas stations but the warning light kept coming on. I scoured these forums and Google and didn't find a fix, though I did find many people frustrated ("damn you Peugeot" etc.) and not knowing what to do. Best temporary fix I found (I stopped going to the repair shops to reset the warning display) was some Russian fellow who posted that if you pump the gas 3 times (I did it 6 times) with the ignition on but the engine not running and then start the car and gun it, the warning light goes off next time you start the car. It worked, though it was a temporary fix, as the warning would come back on after a while (could be an hour or the next day).

I finally saw some Greek forums and decided to take another approach, that of adding a fuel injection cleaner. I added 300 ml of Liqui Moly on a quarter tank of gas, ran it for a few kilometers before filling. The problem has disappeared and it has been about a week now. Could this be the fix?

https://www.google.com/url?sa=i&rct=j&q ... 6225535648

[xantia_v6]

Which engine is fitted to your car? If you post the VIN, we can look it up exactly.

[peugeot308sw]

1.6 VTi 5MT (120 HP)