First post/thread so my apologies if I screw this up.
I have looked through here to see if I can figure out where to go with what I have done so far.
I have a 2004 Jetta 2.0L, recently had work done to replace a broken timing belt by a dealer, when I got the vehicle back the MIL was on, they said it was the O2 Sensor (Code P0544 or P0546) depending on which time it has been read.
I finally got around to replacing the O2 sensor that I have been told was the problem. When I started up the car the MIL cleared, I drove around for about 45 minutes, returned my O2 Sensor socket to Auto Zone and then started the car back up and it threw a code, haven't looked it up yet, but I assume it is for the same thing.
The dealer told me the part I needed to replace was 06A 906 088, the part I pulled from the car was 06A 906 262.
First question did I pull the wrong sensor?
Next question, if I pulled the wrong sensor, where is the other Pre Cat sensor on this car, the one I pulled was the one directly in front of the Firewall on top of the Exhaust manifold.
Also is there anyone in Charleston, SC that has a VAG-COM reader I can work with, versus going up to Charlotte to hang out with my buddy up there who has one?