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P0430 code erro

1.8K views 3 replies 3 participants last post by  peva  
#1 ·
Hi Intrepid lovers,

2 weeks ago my Check engine light popped up on the way home. following day i took it to car repair shop to check the error from OBDII. They checked and read P0430 error code. They cancelled the error. Starting from the same day i have been observing a huge water leak before muffler and from the exhaust. At first i suspected from bad head gasket cuz my coolant level was always decreasing. got it pressure test and ended up a loosen hose from coolant line. they told me the reason for water leak is from condensation. But i never saw a huge water leak before.it started right after the check engine light on. Today my check engine light came back. My question is it because of bad O2 sensors or catalytic convertor. thansk for your time for reading and answering this thread.
 
#3 ·
I installed a set of the non-foulers. No issues since.

ONLY for the rear sensors.
420 and 430 point to the post-cat(rear) sensors.

I did NOT double them up and drill them out.
I just bought one package (two) added a thick washer and screwed them in.
The washer keeps the sensor from bottoming out in the non-fouler.
.
.
 
#4 ·
I also used them successfully. I have yet to see a single post by anyone saying that the non-foulers did not prevent the codes, but a lot of people have posted that it did work for them.