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Old 11-07-2011, 14:30   #1 (permalink)
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confused Engine code p0430

I went to Advance Auto parts and got my engine scanned today. Got the p0430 code (catalyst efficiency below threshold bank 2). I've heard that this is generally an O2 sensor issue, not a cat converter problem.
If someone could help me out with this, I'd really appreciate it. And if it is an O2 sensor, could you include a diagram/instructions on to remove it.

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Old 11-07-2011, 16:07   #2 (permalink)
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Re: Engine code p0430

If you go to Autozones web site and put the information in, there are repair manuals there that should help. Also, read this: http://www.obd-codes.com/p0430
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Old 11-13-2011, 12:56   #3 (permalink)
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Re: Engine code p0430

Thanks Bert. But can you tell me if its an upstream sensor or a downstream sensor? I went to advance and, based on some context clues from research, i bought a downstream sensor. The guy at the store also said that there are two on each side of the convertor. Do i need to replace both, or just one?
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Old 11-13-2011, 16:20   #4 (permalink)
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Re: Engine code p0430

That code is for the sensor after the cats. What engine do you have?
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Old 11-15-2011, 14:27   #5 (permalink)
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Re: Engine code p0430

3.0L V6
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Old 11-15-2011, 14:40   #6 (permalink)
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Re: Engine code p0430

Have you checked for an exhaust leak?
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