O2 sensor

Tiny
BROWN_SKYLAR
  • MEMBER
  • 2002 VOLKSWAGEN JETTA
  • 4 CYL
  • FWD
  • MANUAL
P0420 Where is the O 2 sensor on a 2002 VW Jetta
Monday, February 21st, 2011 AT 10:04 PM

1 Reply

Tiny
WRENCHTECH
  • MECHANIC
  • 20,761 POSTS
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.
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Saturday, March 17th, 2012 AT 5:26 PM

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