1997 Chevy Tahoe 5.7 code p0430 - Diesel Truck Forum - TheDieselGarage.com
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post #1 of 5 (permalink) Old 05-10-2012, 12:52 AM Thread Starter
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1997 Chevy Tahoe 5.7 code p0430

My check engine light came on I read the code is said p0430 ( Catalyst system Efficiency below Threshold Bank 2) the truck has two catalytic converters is there a way to pin point just what the problem is. I am not convinced that the cat on bank 2 is bad.
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post #2 of 5 (permalink) Old 05-26-2014, 12:15 AM
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A little late but I took your code P0430 with that phrase included and it seems to point to a cat not working accordingly, but, since you believe its not you need to monitor other things involved and test as well.

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post #3 of 5 (permalink) Old 05-28-2014, 03:55 AM Thread Starter
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As it turned out I did replace both cats and it still wouldn't pass emission test but did run so much better. I replaced the gas cap and all is good in Chevy world
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post #4 of 5 (permalink) Old 05-29-2014, 12:44 AM
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Good deal, just keep up maintenance and it will always run fine. Did they say what reading(s) was too high if you remember?

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post #5 of 5 (permalink) Old 05-30-2014, 12:35 AM Thread Starter
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I just put my OBD Scaner on and it fluctuated from real low to off the chart
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