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P1404 Diagnostic Trouble Code Discussion for November 2010

EGR Position Sensor Rationality Closed

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Trouble Ticket Help Requests for DTC P1404
Help Request Posted
1998 Chevrolet K1500 Silverado 5.7L MIL Lamp on VIN: 2GCEK19R6W
P1404: EGR Valve Closed Position Performance. hello friends, trying to tackle code p1404 egr pintle sticking open, cleared code, road tested vehicle, code reset with in a short drive, scan tool was showing desired and actual %, appeared to be within range, not showing partially stuck open, removed egr val...
November 02, 2010
2005 Chevrolet Silverado 2500 HD 6.6L MIL Lamp on VIN: 1GCHK23225
P1404: EGR Valve Closed Position Performance. ... egr activation test and all % match des and acutual and maf drops dramatically. maf 48 no egr, 28gs with 10% egr, 3gs with 30%. performed amp test on 5vlt term a to b= .165. tested volt drop on b to grn .05volts. calculated results for ohms was .303 ok. Co...
November 02, 2010