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P1404 Diagnostic Trouble Code Discussion for August 2006

EGR Position Sensor Rationality Closed

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Trouble Ticket Help Requests for DTC P1404
Help Request Posted
1997 Pontiac Grand Am SE 2.4L Hesitation, Surge, MIL Lamp on VIN: 1G2NE52T6V
P1404: EGR Valve Closed Position Performance. Vehicle came in with MIL on and DTCs in memory. Looking at the data w/engine running showed TP% at 23%, EGR% at 65% but engine running smoothly. Backprobing the EGR 5V reference showed almost battery voltage and same with the TPS. But, with KOEO, they were bot...
August 10, 2006