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P1408 Diagnostic Trouble Code Discussion for October 2005

Manifold Absolute Pressure Sensor Signal Performance

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Trouble Ticket Help Requests for DTC P1408
Help Request Posted
1997 Ford F-150 4.2L Poor Idle Quality, Misfire, MIL Lamp on VIN: 1FTDF1726V
P1408: egr out of range. READ RELATED REPAIR HISTORY AND TESTING BEFORE THIS PARAGRAPH AND YOU MIGHT NOT BE AS CONFUSED.upon inspection i noticed a definite internal eng. noise that was somewhat intermittent. r/s exh. manifold bolts loose. dpfe hoses both have holes in them and intern...
October 04, 2005
1995 Mercury Grand Marquis LS 4.6L MIL Lamp on VIN: 2MELM75W1S
P1408: egr flow out of self test range. Thanks to all techs who respond. This vehicle came into the shop with the check engine light lit. The code was 401. Several test were performed. During the test it was discovered that the EVR wasn't putting out the required voltage, so it was replaced. We thou...
October 20, 2005