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P0401 Diagnostic Trouble Code Discussion for April 2020

Insufficient EGR Flow Detected


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Trouble Ticket Help Requests for DTC P0401
Help Request Posted
2008 Chevrolet Silverado 2500 HD WT 6.6L MIL Lamp on VIN: 1GCHK29638
P0401: EGR low flow. I have this 08 GM 6.6L diesel with P0401 & P003a codes. I am pretty sure the turbo variable vanes are "sticky" causing the P003A code, I can watch the actual vs. command and it is not very stable. The question I have is for the EGR flow code P0...
April 15, 2020