Question

I have this issue in my 2005 audi a4 B6 Model. I switched coils around and got the same issue with the 302 code. Than I changed plugs 1 and 2 and the error was now 301. So i purchased 4 new plugs. After 2 weeks the error has come back. Again i switched coils 2 and 3, but the error is staying in 302. Any suggestions?

Answer 1

P0302 Misfire number 2 cylinder

If there is any other code that is accompanied this misfire code , such as a lean fuel trim code? P0171, Audi are sensitve to fuel deposit in the cumbustion chamber, Run a fuel injection cleaner that has a fuel deposit control additive.