check engine light
06-27-2004, 07:17 PM
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Originally Posted by ataylors
Trouble Code P0420 - Catalytic Converter Inefficiency Bank 1
I assume your running O2 sims, right?? Looks like one might be bad
I assume your running O2 sims, right?? Looks like one might be bad
06-27-2004, 07:24 PM
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Originally Posted by ataylors
well if you want to be sure, swap them and see if you start throwing a code for the other side.