Code P0430 1996 LT4
Thread Starter
Intermediate
Joined: Aug 2025
Posts: 31
Likes: 8
From: Wilsonville, Oregon
Code P0430 1996 LT4
Hey guys code P0430 popped up on my 1996 LT4. Bad cat? I kinda doubt it, 100K miles, muffler delete done. What should I check for? Any other threads on this issue? Thank you in advance!
Racer
Joined: Nov 2022
Posts: 344
Likes: 30
From: Massachusetts
My advice is to go to your local auto parts store and buy a spark plug anti fouler and install on the o2 sensor after the converter and reset light and drive it for a few weeks to see if light comes back on. Make sure to get the deeper anti fouler so it will fit the sensor. I think they’re 14mm thread size. And the length is the size of the old Chrysler spark plugs.if the light stays of you will know it’s the converter.
