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Code P0430

Old 03-22-2005, 11:18 PM
Thread Starter
Join Date: May 2004
Location: United States
Posts: 1
Default Code P0430

Pulled a P0430 off the OBD port which is a "catalyst Efficiency below threshold (bank 2)". Does this mean that my cat is shot? That's my guess. Help!

Old 03-23-2005, 02:35 PM
Join Date: Mar 2005
Posts: 254
Default RE: Code P0430

it would be a cat or O2 sensor issue...
Old 03-25-2005, 10:40 AM
Join Date: Mar 2005
Posts: 17
Default RE: Code P0430

sounds like o2, have you done any work to the truck recently, and after you clear the code does drivability change?
Old 06-07-2009, 02:15 AM
Junior Member
Join Date: Jun 2009
Posts: 21

could be a hole in the exhaust too.
If your gas has changed formulas drastically recently, detach the battery and let the system drain of power for a good half hour or longer. It'll reset your computer and sensors.

I had to do that with my truck when I came back to florida from Nebraska. I was getting crappy gas milage until I did. Now I'm back to normal. For me it was going from 15+% ethenol and high altitude to e10- and low altitude. still a simple thing to try before spending money.
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