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2008 GMC Sierra 1500 5.3l vortec AFM-P0301

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Old Sep 28, 2022 | 11:29 PM
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Originally Posted by JGln
It'* also been throwing a lot of false codes, like B2aaa, could this possibly be an ECM issue? I didn't clear the 0171 and 4 codes, checked it again after start up and false codes showed this time.
B codes are body codes. It looks like there'* something else going on besides engine stuff.
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Old Oct 2, 2022 | 09:50 AM
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Have also seen MAF sensors set fuel trim codes and causing misfires. something else to keep in mind along with what others have mentioned.
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