SES Light..code P0430?
#1
SES Light..code P0430?
Went to autozone and they scanned...P0430 came up. Guy checked my air filter and said I needed it replaced(he was right). He reset the light and I got the air filter...everything was fine. 25 minutes later while I'm driving the SES light comes back on. What causes this code...how do I fix this? Thanks in advance. I'm going on a short trip in bout 8 hours til tues. about 350miles each way...wanna make sure everythings cool.
#3
Also, I have a jet hot longtubes(no air/egr fittings) and magnaflow catback NOT INSTALLED. If I were to get these put on could I run without cats? would that then bypass whatever it is I would have to do so they don't throw the codes I'm getting now? please help.
#4
p0430 catalyst efficiency below threshold
This code is usually caused by exhaust modifications (removing cats, long tube headers, etc.). If you still have your stock exhaust system, then it could be a bad O2 sensor or a bad cat converter on passenger side (bank 2).
This code is usually caused by exhaust modifications (removing cats, long tube headers, etc.). If you still have your stock exhaust system, then it could be a bad O2 sensor or a bad cat converter on passenger side (bank 2).
#5
Originally Posted by deezel
p0430 catalyst efficiency below threshold
This code is usually caused by exhaust modifications (removing cats, long tube headers, etc.). If you still have your stock exhaust system, then it could be a bad O2 sensor or a bad cat converter on passenger side (bank 2).
This code is usually caused by exhaust modifications (removing cats, long tube headers, etc.). If you still have your stock exhaust system, then it could be a bad O2 sensor or a bad cat converter on passenger side (bank 2).
im thinking if i have to pay for a new cat i would rather install the LTs and exhaust with a custom y with no cats...that would work to right?
#6
On The Tree
Common with LTs and hi-flows. If you have NO CATS, ya, that’s it. I just got done doing a write up. Check it out, it should help.
https://ls1tech.com/forums/pcm-diagnostics-tuning/195774-just-gutted-cats-wonderful-check-engine-light-any-homemade-tricks.html
420/430 codes are just too much HC in the exhaust, which = >0.045V on the rear O2s.
Also as for warranty, emmisions are a FEDRAL STANDARD that the dealer warranty them for 75K miles. If your below that and stock, take it in! If the cat is bad, they are responsible not you. That saves you some $$$$.
https://ls1tech.com/forums/pcm-diagnostics-tuning/195774-just-gutted-cats-wonderful-check-engine-light-any-homemade-tricks.html
420/430 codes are just too much HC in the exhaust, which = >0.045V on the rear O2s.
Also as for warranty, emmisions are a FEDRAL STANDARD that the dealer warranty them for 75K miles. If your below that and stock, take it in! If the cat is bad, they are responsible not you. That saves you some $$$$.
Last edited by Catskynr; 07-30-2004 at 06:29 PM.
#7
TECH Regular
Join Date: Feb 2003
Location: Pasadena, CA
Posts: 430
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by Catskynr
Common with LTs and hi-flows.
420/430 codes are just too much HC in the exhaust, which = >0.045V on the rear O2s.
420/430 codes are just too much HC in the exhaust, which = >0.045V on the rear O2s.