20 Most Recent 2007 Peugeot 407 2.0 - Page 5 Questions & Answers

take it to an accredited diesel repair shop and have the injectors reconditioned it indicates a problem injector that is not shutting off and is dribbling a small amount of fuel into the cylinder which is the precombusting causing the piston to slap the cylinder wall hard

Get a good DIY mechanic to remove the seat, see if it can be rewelded or request the part from a dealer or retrieve one from a junk yard.

Its telling you the cat or the exhaust gas recirculating system has blocked or failed. You need a specialist or dealer to ascertain what part. Its typical French, sorry.

Most Peugeots are under the lhs dash alongside the heater box. And fail on a regular basis. Sorry

The entire fuel system will need to be drained and purged (At the fuel pressure test port, Usually a scoville valve). The possibility of sticking of the piston rings could occur. Try removing the spark plugs and spray a liberal amount of PB Blaster into the cylinders and let soak for about 30 min. Then spin the engine to evacuate cylinders ,to prevent hydro-locking, reinstall the spark plugs. ASUMING the 407 is a gasoline engine, it should run. If the 407 is a diesel engine the mix should not have any adverse effect. Just keep adding fresh diesel fuel until rough run clears up.

It would be under the hood next to the brake power booster on the firewall, it is not very big about half the size of a coffee cup.