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Home >> Ford >> 2000 >> Taurus LX, 3.0 2, AX4N >> Repair and Diagnosis >> External Pages >> Different car >> Section 1815 (Engine Controls - Powertrain DTC Charts & Descriptions - DTC P0600 Through DTC P164A - (Except Diesel & Hybrid)) >> DTC P1506: Idle Air Control (IAC) OVERSPEED Error

DTC P1506: Idle Air Control (IAC) OVERSPEED Error

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P1506 - IDLE AIR CONTROL (IAC) OVERSPEED ERROR

Description:  This DTC sets when the powertrain control module (PCM) detects an engine idle speed that is greater than the desired RPM.
Possible Causes: 
  • IAC circuit short to ground
  • Damaged IAC valve
  • IAC valve stuck open
  • Intake air leak after throttle body
  • Vacuum leaks
  • Damaged EVAP system
Diagnostic Aids:  Disconnect the IAC valve and look for little or no change in engine RPM as an indication of a stuck or damaged valve.
Application  Key On Engine Off  Key On Engine Running  Continuous Memory 
All GO to PINPOINT TEST KE .
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