1998 Chevy Suburban

Tiny
HOPEMAN
  • MEMBER
  • 1998 CHEVROLET SUBURBAN
  • V8
  • 4WD
  • AUTOMATIC
  • 200,600 MILES
I have a code showing on my check engine light p0420 and p0430 can someone tell me what it is and how to fix it
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Thursday, May 14th, 2009 AT 5:56 PM

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Tiny
DR LOOT
  • EXPERT
Code p0420 is system low Efficiency bank 1 and p0430 is system low Efficiency bank 2 There is a lot of diagnostic procedure to resolve the issues, and it is probably going to bore you, my advice to you is with 200,000 miles on your suburban I would change the oxygen sensors on Bank 1 and bank 2, oxygen sensors only are good for about 70,000 miles, you may also have a bad Catalytic converter if you have the money change it to.
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Saturday, May 16th, 2009 AT 3:51 PM

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