1996 chevy impala ss showing codes P0410 and P0420

mariog6187 · **Joined:** Sat Aug 04, 2007 10:55 pm **Posts:** 1

i have a 96 impala ss with approx. 116k miles its showing codes p0410 and p0420. are these two codes related? can they be caused by the same problem? doing some research i have found that it can either be an o2 sensor or the cat converter. does anyone know which one it may probably be? how can i test each one to find the specific problem(please be specific, cause i have no idea what i am doing)? how much would a mechanic charge for a new cat?
thanks[/b]

Sponsored Links · **Joined:** 29 Jun 2004 08:12 pm **Posts:** N/A

Darkrooms · **Joined:** Thu Mar 29, 2007 9:44 am **Posts:** 1424

410 and 420 are poor catalyst efficiency on both banks of your engine. Its unlikely to be o2 sensors. Your cats are not working properly. Note: lean running engine, or rich engine, or engine miss, and aftermaket tuner parts that modify fuel system can ruin a catalytic converter.

1996 chevy impala ss showing codes P0410 and P0420

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