1999 GEO PRIZM CODE P0420

  • Tiny
  • rod3521
  • 1999 Geo Prizm

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?

Do you
have the same problem?
Yes
No
Sunday, February 24th, 2008 AT 12:16 PM

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