P0420 Where is the O 2 sensor on a 2002 VW Jetta
Feb 21, 2011 at 2:04 PM
O2 sensor
BROWN_SKYLAR
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- 1 POST
This will not be an O/2 problem. Even a lazy sensor can't set that code. In order for that code to set the rear O/2 has to mirror the front O/2 for long enough to see a pattern telling the computer that the exhaust is leaving the converter in the same condition that it enters.
Mar 17, 2012 at 10:26 AM
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