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1999 Chevy Suburban OxegenSensor code P0430

Tiny
JJFITZ
  • MEMBER
  • 1999 CHEVROLET SUBURBAN
Engine Performance problem
1999 Chevy Suburban V8 Four Wheel Drive Automatic

I need to know which sensor is bank 2, I have 4 sensors which one is it?
Tuesday, October 26th, 2010 AT 1:59 PM

3 Replies

Tiny
WRENCHTECH
  • MECHANIC
  • 20,757 POSTS
Where did you get the idea that PO430 is an oxygen sensor code. That is for bad Catalyst efficiency on bank 2 which is almost always a bad Catalytic Converter.
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Tuesday, October 26th, 2010 AT 3:28 PM
Tiny
JJFITZ
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  • 2 POSTS
I was told by the mechanic that inspected my truck. You said almost always a bad catalytic converter, what else could it be?
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Tuesday, October 26th, 2010 AT 3:41 PM
Tiny
WRENCHTECH
  • MECHANIC
  • 20,757 POSTS
I've seen it be something else only one time and that was a crack in the exhaust between the 2 oxygen sensors. There is a lot of criteria it has to meet to set that code and it's rarely wrong. There are always exceptions to everything.
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Tuesday, October 26th, 2010 AT 3:45 PM

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