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P1408 Diagnostic Trouble Code Discussion for September 2005

Manifold Absolute Pressure Sensor Signal Performance

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Trouble Ticket Help Requests for DTC P1408
Help Request Posted
1999 Mercury Sable LS 3.0L MIL Lamp on VIN: 1MEFM53S8X
P1408: EGR Flow out of Range. The P1408 Has not returned, only the P0401. The Snap on scan tool shows the DPFE sensor voltage is 1.07 volts. This is KOEO or KOER. If I Unplug the sensor, the voltage goes to 5.12 volts. At the sensor connector I have 3.39 volts from a good ground to either ...
September 27, 2005