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Home >> Ford >> 2000 >> Contour SE, 2.0 3, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 753 (Engine Controls - Powertrain DTC Charts & Descriptions - CNG, Flex-Fuel & Gasoline) >> Diagnostic Trouble Code (DTC) Charts >> P1506 - Idle Air Control (IAC) OVERSPEED Error

P1506 - Idle Air Control (IAC) OVERSPEED Error

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P1506 - IDLE AIR CONTROL (IAC) OVERSPEED ERROR

Description:  This DTC is set when the PCM detects an engine idle speed that is greater than the desired RPM.
Possible Causes: 
  • IAC circuit short to GND.
  • Damaged or incorrect IAC valve.
  • IAC valve stuck open.
  • Air intake leak after throttle body.
  • Vacuum Leaks.
  • Failed EVAP system.
  • Damaged PCM.
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 KE: Idle Air Control (IAC) Valve STEP 2
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