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2003 Jetta GLS 2.0L AVH engine, 183,000 miles. Check engine light keeps coming on for the same reason after having the following work done. VW mechanic has read the diagnostic wave form which indicates that the downstream oxygen sensor is reading a HC level that is too high. Replaced the catalytic converter with a universal unit and replaced both oxygen sensors.

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Hi there,

It seems due to messing around with that sensor connection on the original intake.
check all that connections.

Good Luck
Thanks

Posted on May 16, 2009

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