CODE P0420

1999 Geo Prizm

Tiny

rod3521

February, 24, 2008 AT 12:16 PM

Engine Performance problem
1999 Geo Prizm 4 cyl Two Wheel Drive Automatic 114000 miles

I own a 1999 prism with the code p0420. I need to find out what I need to replace. Cat, O2 sensor?

FOUND 143 RELATED QUESTIONS

P0420 Cat Converter

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