Still trying to find out which sensor is causing my CEL of o2 sensor signal stuck rich sensor 1, system too lean, and post cat trim too rich.
Would a vagcom cable give me more insight as to where the issue lies?
First thought it was an intake leak causing metered air to escape and extra fuel to be burnt.
What I've tried so far: Smoked the intake, replaced MAF, and replaced coolant temperature sensor.
I think it's in some type of default mode, and it's getting about 24-25 mpg (2.5l gas).
Is it possible that pre cat o2 is bad? In my experience, if the pre cat o2 goes bad, the car runs like spanked ass. I have no issues with driveability as it is now. This is my first VW, so still learning the character of the car.
Last edited by DevilDogge; 04-20-2015 at 02:14 PM..