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How do I know what the problem truly is?

Tiny
LOVES2HUNTNFISH
  • MEMBER
  • 2000 TOYOTA 4RUNNER
  • 135 MILES
I just bought my car and I am the second owner. I drove 250 miles and the check engine light came on. Took it to Autozone and codes read: Catalyst system efficiency below threshold, air leak in exhaust before rear H02S, AF system error or faulty catalytic converter.
Dealer says he tuned up vehicle, along with replacing, wheels tires etc. I have to take it back for repair but I want to make sure the repair takes care of the problem. How will I truly know what the problem is and how will I know they honestly replaced anything?
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Thursday, December 22nd, 2011 AT 1:56 AM

3 Replies

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
You have a DTC P0420 possibly a catalytic converter or an oxygen sensor problem-
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Thursday, December 22nd, 2011 AT 2:16 AM
Tiny
LOVES2HUNTNFISH
  • MEMBER
  • 2 POSTS
Mesage should have read 2000 Celica, probably not important. If the cat needs replaced can you give me an idea of how long it wil take to replace it?
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Friday, December 23rd, 2011 AT 2:31 AM
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
You gonna have to shop around for the lowest bidder-cost/labor it varies with location
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Friday, December 23rd, 2011 AT 2:37 AM

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