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P1404 Diagnostic Trouble Code Discussion for May 2007

EGR Position Sensor Rationality Closed

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Trouble Ticket Help Requests for DTC P1404
Help Request Posted
2001 Pontiac Grand Prix GTP 3.8L MIL Lamp on VIN: 1G2WR52151
P1404: EGR Valve Closed Position Performance. ... converter, code P1404. Scan tool shows actual EGR position at 8% when it is commanded 0%. When driving car EGR position tracks desired position exactly when commanded over 8%. Tried 2 other ERG valves (1 known good, 1 new) and minimum actual reading was 9%...
May 11, 2007
1997 Mercedes-Benz E300 3.0L MIL Lamp on VIN: WDBJF20F6V
P1404: EGR control. ... code, P1404 EGR control history code, P1475 Resonance intake line switchover valve current and history code. Cleared codes and did road test. P1475 returned on road test, tested Y22/7 switchover valve and it remains closed a...
May 16, 2007