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P1408 Diagnostic Trouble Code Discussion for September 2007

Manifold Absolute Pressure Sensor Signal Performance

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Trouble Ticket Help Requests for DTC P1408
Help Request Posted
2001 Ford F-150 King Ranch 4.6L Excessive Emissions, MIL Lamp on VIN: 1FTRW07W71
P1408: egr flow out of range. ... fixed the P0401. The first test was to put a vacuum pump on the egr valve and apply vacuum, the engine does not die. The idle is a little lower. So it has a flow problem. I removed the EGR valve, tested ok, cleaned it. It is located on drivers side of 90 d...
September 20, 2007