E46 Fanatics Forum banner
1 - 1 of 1 Posts

· Registered
2002 330ci auto
1,690 Posts
Oh wow, never noticed that, should I get this welded asap? Could this be the thing causing the mpg? I will check for more in the morning.
Unplug the precat O2 and see how the car runs. I would, a crack near the O2 sensor is likely tricking the car into thinking it's running lean, so it'll keep increasing the fuel injection
1 - 1 of 1 Posts