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P140C Diagnostic Trouble Code Discussion for September 2021

EGR slow response decreasing flow

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Trouble Ticket Help Requests for DTC P140C
Help Request Posted
2011 Chevrolet Silverado 2500 HD LTZ 6.6L MIL Lamp on VIN: 1GC1KYC86B
P140C: EGR slow response decreasing flow. ... this is one customer we make exceptions for. It has a code P140c for low EGR flow. We commanded the valve open up to 40%, that is the limit of our Snap on scanner. Desired and actual values showed the same. Engine did not run any differently. We remov...
September 16, 2021