P0404 Diagnostic Trouble Code Discussion for June 2013
EGR Position Sensor Performance
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| 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 |
