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2001 Chevrolet Silverado 1500

Question: thershold o2 sensor po420

Question

Visitor, 5.3L V8, Las Vegas, NV, January 20, 2011, 09:59

wat do i do

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  • Answer #1

    ZeeTech January 20, 2011, 10:19
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     Master

    It's a catalytic converter efficiency at Bank 1 code.
    Looks like you have to get a new catalytic converter. I'd check live data to take look at the O2 sensors, but there is a high possibility for the failed converter.

    Zee

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