codes P0430 and P0420

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09-19-2017 | 06:29 AM

cjts2000

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codes P0430 and P0420

my 2003 has 211,000 miles on it I know the codes have to do with the catalitic converter and running rich Should I start with changing the plugs and some fuelo injection cleaner

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09-19-2017 | 08:19 AM

Billman250

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From: Long Island, New York

Neither "guesses" have anything to do with your code.

P0420 is an inefficient cat, repaired by cat replacement or a spark plug spacer on the rear o2 sensor.

P0430 is not a valid code, check again.

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