1999 Chevy Suburban OxegenSensor code P0430

1999 CHEVROLET SUBURBAN
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JJFITZ
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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???
Oct 26, 2010 at 6:59 AM
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WRENCHTECH
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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.
Oct 26, 2010 at 8:28 AM
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JJFITZ
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I was told by the mechanic that inspected my truck. You said almost always a bad catalytic converter, what else could it be???
Oct 26, 2010 at 8:41 AM
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WRENCHTECH
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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.
Oct 26, 2010 at 8:45 AM
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