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P0401 Diagnostic Trouble Code Discussion for February 2014

Insufficient EGR Flow Detected

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Trouble Ticket Help Requests for DTC P0401
Help Request Posted
2004 GMC Sierra 2500 HD SLE 6.6L Hesitation, MIL Lamp on, Smokes and no power VIN: 1GTHC29164
P0401: EGR Flow Insufficient Detected. this is now the second truck we have in our shop with over 300k miles and with the same exact problems. when the customer is cruising on the freeway and then needs to step on it or even getting on a on-ramp sometimes its just black smoke and no power. sets the...
February 27, 2014