anyone have luck clearing pO420, p0430 codes for smog test? - Lexus IS Forum
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post #1 of 6 (permalink) Old 02-19-2019, 12:02 PM Thread Starter
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anyone have luck clearing pO420, p0430 codes for smog test?

Have 1st gen IS 300 need to pass smog anyone have luck with any additives for the IS?
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post #2 of 6 (permalink) Old 02-19-2019, 01:55 PM
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u have both codes?

"I know that SOB is cheatin! Cause, I'm cheatin and he beat me"!
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post #3 of 6 (permalink) Old 02-19-2019, 02:15 PM
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I'd try the Lucas oil product, it worked on my old car
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post #4 of 6 (permalink) Old 02-19-2019, 03:15 PM
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Quote:
Originally Posted by Beeeastman1 View Post
Have 1st gen IS 300 need to pass smog anyone have luck with any additives for the IS?
Replace the cats in the manifold or simulate the rear O2's.
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post #5 of 6 (permalink) Old 02-19-2019, 04:13 PM Thread Starter
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Have both codes yeah, I ran lacquer thinner I had luck using a full bottle of Lucas deep clean fuel system cleaner on a quarter tank and it cleared these codes long enough to pass smog 2 yrs ago, I am thinking of spraying seafoam into b1 s1 o2 outlet reinstalling sensor and maybe it would blow out the crap no the cats?
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post #6 of 6 (permalink) Old 02-19-2019, 04:14 PM Thread Starter
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I had spacers on rear o2 sensors of both banks and it cleared code butcheries smog check guy saw them with his mirror on a stick
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