P0430 Code

[tjadkins]

Alright, so here's what's been goin' on.

I'm new here, first time posting. I have been on this site a lot looking at threads for similiar problems I've been having. However, I am stumped. With searching all over the internet I can't find something concrete. By the way, Merry Christmas!

 

My 2000 5.3 Silverado has been through a lot, as I'm sure everyone else's trucks have been. I have put a lot of money back into it to get it running like new. And for the most part it does. Though I have always had this hestitation problem. From a dead stop to flooring the pedal, it stumbles and hestitates for a second or two, then it takes off.

 

This isn't the first time, but again it threw a P0430 code, and that's the only code it threw. I have relatively new cats on it (less than 2 years old), 2/4 new o2 sensors, new fuel pump, new pressure regulator, new fuel filter, new spark plugs, new spark plug wires (AC Delco mind you, oem), new pcv, etc.

 

I have a small leak between the headers and the y-pipe on the driver side, where they bolt together. Perhaps this could be the problem? I doubt it, it doesn't seem like that would cause my hestitation. Anyways, I have not checked for vacuum leaks and the cats should not be bad.

 

If anyone could possibly shed some light on what I could do to fix my sputtering problem? It'd be awesome! Thank you so much.

[jimbrown1]

This is what I found when I googled the OBD-II trouble code.

 

http://www.obd-codes.com/p0430

[tjadkins]

This is what I found when I googled the OBD-II trouble code.

 

http://www.obd-codes.com/p0430

 

 

Alright thank you. I can assume it's either an o2 sensor or my exhaust is leaking. However, it says that the symptoms of this :

 

'You will likely not notice any drivability problems, although there may be symptoms such as a rough/hard idle when cold'

 

This doesn't explain what could be causing my hestitation. My idle is completely smooth no problems.