LS430 P0430 Catalyst problems
Thread Starter
Driver School Candidate
Joined: Nov 2013
Posts: 25
Likes: 0
From: United Kingdon
LS430 P0430 Catalyst problems
Hi guys
Only had the car just over a week now and its developed this problem a P0430.
I have read into it and it said to be a Catalyst System Efficiency Below Threshold Bank 2.
Now wishful thinking, could this just be a o2 sensor?
The car does have a slight judder on idle but drives fine other than that.
It is LPG converted and on LPG the judder is more noticeable
How much is a new cat and I am assuming it would have to be from dealers? is there anything I can do to repair this one?
The car only has 92k miles but is also LPG converted which I would have thought been better for the cat as it runs richer.
Thanks in advance.
Only had the car just over a week now and its developed this problem a P0430.
I have read into it and it said to be a Catalyst System Efficiency Below Threshold Bank 2.
Now wishful thinking, could this just be a o2 sensor?
The car does have a slight judder on idle but drives fine other than that.
It is LPG converted and on LPG the judder is more noticeable
How much is a new cat and I am assuming it would have to be from dealers? is there anything I can do to repair this one?
The car only has 92k miles but is also LPG converted which I would have thought been better for the cat as it runs richer.
Thanks in advance.
Thread Starter
Driver School Candidate
Joined: Nov 2013
Posts: 25
Likes: 0
From: United Kingdon
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Instructor
Joined: Dec 2015
Posts: 878
Likes: 232
From: Arizona
It's a pretty common problem on these cars. Mine did it badly when I first got it. I just replaced my front O2 sensors and it seems to be better. I always thought it was weird the smell would permeate the interior even if the windows were all closed and the ac was on recirculation. That and it would be worse when getting on the freeway going 70 mph. I couldn't figure how the smell would make it back inside.
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Lead Lap
Joined: Nov 2013
Posts: 608
Likes: 20
From: Quebec, Canada
+1 on the exhaust leak. It's almost always a crack on the Y-pipe. You'll have to remove the heat shields to access it. A competent exhaust shop should be able to repair it or fab up a new pipe. If not there's a new unit available on Rock Auto for $250 from Davico. Dealer price is like $1200.
Instructor
Joined: Oct 2010
Posts: 1,241
Likes: 55
From: CA
It's a pretty common problem on these cars. Mine did it badly when I first got it. I just replaced my front O2 sensors and it seems to be better. I always thought it was weird the smell would permeate the interior even if the windows were all closed and the ac was on recirculation. That and it would be worse when getting on the freeway going 70 mph. I couldn't figure how the smell would make it back inside.
Lead Lap
Joined: Oct 2013
Posts: 714
Likes: 6
From: md
Driver School Candidate
Joined: Feb 2016
Posts: 19
Likes: 0
From: MD
I replaced all two converters on my previous 01 430; never purchase/replace at the dealer. Brought them online (Ebay.com) and had them put on at a local shop. Brought them online very inexpensive and then sold the old ones for scrap metal(received about $40 - $50).
Driver School Candidate
Joined: Nov 2014
Posts: 46
Likes: 7
From: Maryland
What brand cats did you buy?