po420 engine code chevy malibu?Advertisement
Would a PO420 code (faulty catalytic converter) effect engine performance on a 2004 Chevy Malibu (classic)? - read more
Problems/Service Issues/Troubleshooting (Generations 5 & 6) ... Like the title says my malibu is throwing this code at me i looked it up and its ... It's either an exhaust leak, rear HO2 sensor or the cat is bad. Of course, if the CAT has has been contaminated, and not just worn out, then the ... - read more
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