K&N Filter Causes MAF Sensor Fault Code

[JFP in PA]

Originally Posted by That986

Then the oil has to be coming from somewhere else, failing AOS?

And I've never known them be pre-oiled tbh, normally have the oil in the box with it. Then again it's a long time since i used one of those pieces of ****************, Green Cotton filters for a long time now.

The AOS line enters the intake system behind the throttle body and into the intake.

ALL K&N filters come pre oiled, which can lead to MAF fouling. And while expensive as Hell, they really do not add anything to the car's performance.