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  1. My MKIV problems

    MK4
    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...
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