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2012 Volkswagen Jetta Sedan Base 4dr Auto

2012 Volkswagen Jetta Sedan
Trim Info:
Front Wheel Drive, 4 Door Sedan, Compact Cars
23 (2011) mpg city / 29 (2011) mpg hwy
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June 24, 2013, 7:59 pm

Sarah W

Question: '02 VW Jetta Error Code P0420

My check engine light first came on about 3 years ago and my mechanic said that the catalytic converter efficiency is below factory threshold standards (P0420), but is still operating at normal efficiency. I have passed smog with this error code (check engine light was off bc battery died and by some miracle it stayed off for the duration of smog check).

Could this really be the catalytic converter or is there a chance that it's a faulty oxygen sensor?


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