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1997 Chevy Cavalier exhaust

Tiny
DAVIDFARR3000
  • MEMBER
  • 1997 CHEVROLET CAVALIER
  • 4 CYL
  • FWD
  • AUTOMATIC
  • 195,000 MILES
I was wondering if there is supposed to be any holes on my exhaust at the rear of the car, if im not supposed to the if I do would it trigger a check engine light code po420
Wednesday, October 7th, 2009 AT 2:29 PM

1 Reply

Tiny
MMPRINCE4000
  • MECHANIC
  • 8,549 POSTS
No holes in exhaust, some exhaust heat shields may have holes for cooling.

The P0420 code is a downstream O2 sensor (sensor after or in convertor).
Generally changing this, and have codes erased will solve problem, if not and code reappears, then the convertor itself would be suspect.
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Saturday, October 10th, 2009 AT 8:13 AM

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