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2004 V70 AWD with P0420 code V70-XC70 2004

posted by  KlausC on  Fri Oct 9 09:31 CST 2020
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last visit: Fri Oct 24 10:15 CST 2014
[RELATED]

It could be the front O2 sensor. It could be a leak in the exhaust before the cat. If the front O2 sensor is more than 100K miles old, replace it.

My 1995 850 throws a P0420 when I chug along in rush hour traffic at a steady 10mph or less. I have no idea why! Fortunately, I no longer have to drive to work.
--
Keeping it running is better than buying new






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