Keep getting a p0430
05-10-17, 05:25 AM
#1
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Keep getting a p0430
After doing a few drives in sport+, I get a p0430. I clear it and it comes back, but only in sport +. Only mod to the car is, Avanti cat back exhaust. The car only has 16k on it. Does Lexus, have any issues with these converters on the rcf.
05-10-17, 09:49 AM
#3
I was having the same issue and took me a while to find out the real problem... bad gasket between the cat and catback. get under the car with a flashlight and look above the connection between the exhaust and the cat, if you see even the tinniest mark of smoke you just found the issue. it only takes a minuscule leak to get a CEL with that code. just in case that will be the passenger side. if not the gasket then it could very well be the downstream O2. very unlikely it is the CAT even tough that code is for bad CAT.
Last edited by luislopezt; 05-10-17 at 09:58 AM.
05-14-17, 08:16 AM
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I was having the same issue and took me a while to find out the real problem... bad gasket between the cat and catback. get under the car with a flashlight and look above the connection between the exhaust and the cat, if you see even the tinniest mark of smoke you just found the issue. it only takes a minuscule leak to get a CEL with that code. just in case that will be the passenger side. if not the gasket then it could very well be the downstream O2. very unlikely it is the CAT even tough that code is for bad CAT.
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