P0404 Diagnostic Trouble Code Discussion for September 2016
EGR Position Sensor Performance
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| Help Request | Posted | |
| 2004 GMC Sierra 2500 HD 6.6L MIL Lamp on VIN: 1GTHC23164 P0404: EGR Open Position Performance. Replaced egr VACUUM pump and P0404 dtc remains; do we need to change out the EGR valve as well or the EGR pressure sensor? After looking into issue a bit more the EGR valve and vacuum pump are common fixes - but we have changed out the EGR vacuum pump already ... |
September 23, 2016 | |
| 2004 GMC Sierra 2500 HD 6.6L MIL Lamp on VIN: 1GTHC23164 P0404: EGR Open Position Performance. Replaced egr VACUUM pump and P0404 dtc remains; do we need to change out the EGR valve as well or the EGR pressure sensor? After looking into issue a bit more the EGR valve and vacuum pump are common fixes - but we have changed out the EGR vacuum pump already ... |
September 24, 2016 |
