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P0404 Diagnostic Trouble Code Discussion for June 2013

EGR Position Sensor Performance


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Trouble Ticket Help Requests for DTC P0404
Help Request Posted
2003 Pontiac Grand Prix GT 3.8L MIL Lamp on VIN: 1G2WP52K23
P0404: EGR Open Position Performance. This thing shows misfires on 1+4 around 3,000 RPM, but misfires not felt. Tried a module, swapped coils, and plugs, tried new ignition module, no change. It will flash the SES when driving, in shop shows misfires on scan tool, but no flashing SES. Checked patt...
June 12, 2013
2005 GMC Sierra 2500 HD SLE 6.6L Excessive Emissions, Surge, Misfire, Poor Fuel Economy, Black/white smoke VIN: 1GTHK23245
P0404: EGR Open Position Performance. ... 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
P0404: EGR Open Position Performance. ... 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
2003 Pontiac Grand Prix GT 3.8L MIL Lamp on VIN: 1G2WP52K23
P0404: EGR Open Position Performance. This thing shows misfires on 1+4 around 3,000 RPM, but misfires not felt. Tried a module, swapped coils, and plugs, tried new ignition module, no change. It will flash the SES when driving, in shop shows misfires on scan tool, but no flashing SES. Checked patt...
June 12, 2013
2005 GMC Sierra 2500 HD SLE 6.6L Excessive Emissions, Surge, Misfire, Poor Fuel Economy, Black/white smoke VIN: 1GTHK23245
P0404: EGR Open Position Performance. ... 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
P0404: EGR Open Position Performance. ... 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