P0430 CEL - anyone elses experience?
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Joined: Jun 2011
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From: Ca
P0430 CEL - anyone elses experience?
The car is a '01 Gs430 with 85k miles.
This is the second time in 6 months I've had the P0430 CEL light come on.
It comes back as "Catalyst System Efficiency Below Threshold Bank 2"
The first time it came on was in the dead of a very cold winter 6 months ago.
just last week it popped up again. This time in the heat of the summer.
Both times while cruising.
Has anyone experienced this code and understand what's going on ?
Is it possibly just a bad o2 sensor?
This is the second time in 6 months I've had the P0430 CEL light come on.
It comes back as "Catalyst System Efficiency Below Threshold Bank 2"
The first time it came on was in the dead of a very cold winter 6 months ago.
just last week it popped up again. This time in the heat of the summer.
Both times while cruising.
Has anyone experienced this code and understand what's going on ?
Is it possibly just a bad o2 sensor?
Pole Position
Joined: May 2007
Posts: 3,405
Likes: 55
From: 408 NOR CAL
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Thread Starter
Rookie
Joined: Jun 2011
Posts: 55
Likes: 0
From: Ca
BCP43002; I'm hoping I don't have to deal with a dead cat at this time.
Thanks guys for the replies.
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P0430 solved
I have a 2000 gs400 with about 95k and last week my check engine indicator came on so I took it to the shop the mech tells me it's the cats the need to be replaced I said ok Ty and I took my car went for a second opinion and guy tells me the same at almost $800 formthe job I was upset I came on here to see how many other gs owners had the same problem quite a few after reading it could be an exhaust Leah I went over to willets point near citi field queens ny and had those hole in the wall muffler shops check it out guess what. Exhaust leak right on the flang between cat and exhaust pipe by post u2 sensor 30 he welded both sides shut and the light went off on it's own after about 20 miles thanks for the help guys
I have a 2000 gs400 with about 95k and last week my check engine indicator came on so I took it to the shop the mech tells me it's the cats the need to be replaced I said ok Ty and I took my car went for a second opinion and guy tells me the same at almost $800 formthe job I was upset I came on here to see how many other gs owners had the same problem quite a few after reading it could be an exhaust Leah I went over to willets point near citi field queens ny and had those hole in the wall muffler shops check it out guess what. Exhaust leak right on the flang between cat and exhaust pipe by post u2 sensor 30 he welded both sides shut and the light went off on it's own after about 20 miles thanks for the help guys
I had the same code recently and it turns out I had leaks at my flanges, but I also installed two new sensors which I ordered from amazon and so far no codes and my mileage is back to normal.
My 01 GS300 has the same code. I replaced all 4 oxygen sensor with brand new Denso parts and the code came back after driving about 65 miles. Will be checking for exhaust leaks tommorrow. Hope it is not the cat.
If you got no exhaust leaks and 4 new o2 sensors, the only thing left is the cat itself.