Well my CEL came on for the 2nd time in 2 weeks, I scanned it and came up with
p0134 02 Sensor Circuit No Activity Detected (Bank I Sensor 1)
p0172 System too Rich (Bank 1)
Here's a little back story. I got my 99 jetta 2.0 in february with 79000 miles off a buddy who wanted to get rid of it...