Peugeot 307 mixture preparation error

Hi, I have a 2002 Peugeot 307 with a gasoline engine. Recently, the check engine light came on, and the engine feels like it has reduced power. It runs rough, jerks when accelerating, and sometimes stalls at idle. The error code points to a mixture preparation error. The car has 96672 km. Any ideas?

4 comment(s)

I had similar symptoms in my Peugeot 307. Does it feel like it's misfiring? Could be worth checking the injection valves.

Misfiring is possible, yes. How did you fix yours? Was it definitely the injection valves? Anything else I should check before replacing them?

In my case, it was a defective injector. I'd recommend getting it checked by a workshop. They can confirm with diagnostics. A faulty oxygen sensor can also cause a mixture error, but the symptoms point to an injector.

Thanks for the advice. I took it to a workshop, and you were right, it was a defective injector. Replaced all of them to be safe. Cost me 515€, but the car runs like new again!

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