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P1506 Diagnostic Trouble Code Discussion for November 2008

Idle Air Control System RPM Higher Than Expected

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Trouble Ticket Help Requests for DTC P1506
Help Request Posted
2003 Ford Taurus LX 3.0L Poor Idle Quality VIN: 1FAFP55SX3
P1506: iac overspeed error. tps voltage at idle is at 1 volt,not adjustable.desired voltage set at 1 volt through kam.maf sensor is reading almost 8 grams at idle.no vacuum leaks found with carb spray.iac will not drop below 21 % even with scanner command set at 0%
November 20, 2008