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P0401 Diagnostic Trouble Code Discussion for June 2013

Insufficient EGR Flow Detected


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Trouble Ticket Help Requests for DTC P0401
Help Request Posted
2005 GMC Sierra 2500 HD SLE 6.6L Excessive Emissions, Surge, Misfire, Poor Fuel Economy, Black/white smoke VIN: 1GTHK23245
P0401: EGR Flow Insufficient Detected. ... my hair out on this one. we don't do a lot of diesel work here but enough. Mostly 6.0 Fords and Sprinter fleet work. This is my first real experience with a Duramax and its turning into a doozie. Truck is owned by a retired bodyshop owner/mechanic. Hard/no...
June 19, 2013
2005 GMC Sierra 2500 HD SLE 6.6L Excessive Emissions, Surge, Misfire, Poor Fuel Economy, Black/white smoke VIN: 1GTHK23245
P0401: EGR Flow Insufficient Detected. ... my hair out on this one. we don't do a lot of diesel work here but enough. Mostly 6.0 Fords and Sprinter fleet work. This is my first real experience with a Duramax and its turning into a doozie. Truck is owned by a retired bodyshop owner/mechanic. Hard/no...
June 20, 2013
2007 GMC Sierra 2500 HD SLT 6.6L MIL Lamp on, black smoke VIN: 1GTHK29677
P0401: EGR Flow Insufficient Detected. My understanding is that the DPF filter is no good and must be replaced since the regen wont complete and the soot mass readings are so high. Looking for a second opinion. I dont believe the truck was smoking like this until I replaced the EGR cooler but i can...
June 21, 2013
2008 Chevrolet Express 3500 6.6L MIL Lamp on VIN: 1GBJG31648
P0401: egr insuficiant flow. hi all. this came in with the listed codes and alldata has about nothing on it. i am hoping that it is a common problem and some one will clue me in. i cleared the codes and drove it for about an hour before the check engine lite came on and it went into limp ...
June 24, 2013
2005 GMC Sierra 2500 HD SLE 6.6L Excessive Emissions, Surge, Misfire, Poor Fuel Economy, Black/white smoke VIN: 1GTHK23245
P0401: EGR Flow Insufficient Detected. ... my hair out on this one. we don't do a lot of diesel work here but enough. Mostly 6.0 Fords and Sprinter fleet work. This is my first real experience with a Duramax and its turning into a doozie. Truck is owned by a retired bodyshop owner/mechanic. Hard/no...
June 19, 2013
2005 GMC Sierra 2500 HD SLE 6.6L Excessive Emissions, Surge, Misfire, Poor Fuel Economy, Black/white smoke VIN: 1GTHK23245
P0401: EGR Flow Insufficient Detected. ... my hair out on this one. we don't do a lot of diesel work here but enough. Mostly 6.0 Fords and Sprinter fleet work. This is my first real experience with a Duramax and its turning into a doozie. Truck is owned by a retired bodyshop owner/mechanic. Hard/no...
June 20, 2013
2007 GMC Sierra 2500 HD SLT 6.6L MIL Lamp on, black smoke VIN: 1GTHK29677
P0401: EGR Flow Insufficient Detected. My understanding is that the DPF filter is no good and must be replaced since the regen wont complete and the soot mass readings are so high. Looking for a second opinion. I dont believe the truck was smoking like this until I replaced the EGR cooler but i can...
June 21, 2013
2008 Chevrolet Express 3500 6.6L MIL Lamp on VIN: 1GBJG31648
P0401: egr insuficiant flow. hi all. this came in with the listed codes and alldata has about nothing on it. i am hoping that it is a common problem and some one will clue me in. i cleared the codes and drove it for about an hour before the check engine lite came on and it went into limp ...
June 24, 2013