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P1404 Diagnostic Trouble Code Discussion for March 2011

EGR Position Sensor Rationality Closed

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Trouble Ticket Help Requests for DTC P1404
Help Request Posted
2002 Cadillac Seville STS 4.6L Excessive Emissions, Poor running, ping VIN: 1G6KY54912
P1404: EGR Valve Closed Position Performance. ... the water pump crossover housing and 2 codes in the computer. The first code was p0171 the second code was for a dead o2 seson. We replace the water pump, crossover housing and dead o2 sensor. Test drove the vehicle and SES light came on. At this point the...
March 02, 2011