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Check engine

Tiny
CANADABOY84
  • MEMBER
  • 1998 CHEVROLET SILVERADO
  • 5.7L
  • V8
  • 4WD
  • AUTOMATIC
  • 250,000 MILES
I replaced all 4 of the O2 sensors on my truck a week ago and this afternoon while I was driving home the check engine light came on and through the p0430 engine code what would cause this issue with new o2's
Sunday, January 24th, 2016 AT 11:42 AM

3 Replies

Tiny
WRENCHTECH
  • MECHANIC
  • 20,761 POSTS
You mean you really didn't have 4 defective 0/2 sensor? What a shock.

The code means you have a bad Catalytic Converter on bank 2, not bad 0/2s
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Sunday, January 24th, 2016 AT 11:49 AM
Tiny
CANADABOY84
  • MEMBER
  • 1 POST
So the cat itself needs to be replaced? Is it better to use a aftermarket or oe replacement
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Sunday, January 24th, 2016 AT 11:53 AM
Tiny
WRENCHTECH
  • MECHANIC
  • 20,761 POSTS
You can use an aftermarket but make sure it's an OBD2 Cat. Let the exhaust shop do it for you. They do a better job than you ever could and they may actually be cheaper.
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Sunday, January 24th, 2016 AT 11:54 AM

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