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
Thursday, May 14th, 2009 AT 5:56 PM

1 Reply

Tiny
DR LOOT
  • MECHANIC
  • 2,311 POSTS
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.
SPONSORED LINKS
Was this
answer
helpful?
Yes
No
Saturday, May 16th, 2009 AT 3:51 PM

Please login or register to post a reply.

Related Check Engine Light Content

Code Read Retrieval/Clear Chevrolet
VIDEO
Code Read Retrieval/Clear Chevrolet
Instructional repair video
Check Engine Light
GUIDE
Check Engine Light
Why is my check engine or service engine soon turned on? In this guide we talk about what this is associated with this notorious light, what it is used for and what you...
VIEW MORE

Sponsored links