HELP..2011 Denali

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11-11-2012, 09:27 PM

DENALIHD

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HELP..2011 Denali

Engine Code P140A...anybody know what this is ??...2011 GMC Denali 2500 HD

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Ikeep clearing the code and it keeps comming back on right away....like in seconds...

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this is the 6.6 Duramax Diesel...

Last edited by DENALIHD; 11-11-2012 at 09:27 PM. Reason: Automerged Doublepost

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11-17-2012, 09:53 AM

BriteWhiteRam

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DTC Information
Code: P0140
Modules: PCM
Description: HO2S Circuit Insufficient Activity Bank 1 Sensor 2

this is all I can come up with, hope it helps

If its still under warranty I would get it to the Dealer