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Home >> Ford >> 2000 >> Contour SE, 2.5 L, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 765 (Engine Controls - Powertrain DTC Charts & Description (Except Diesel & Hybrid)) >> Diagnostic Trouble Code (DTC) Charts And Descriptions >> DTC P1507: Idle Air Control (IAC) Underspeed Error

DTC P1507: Idle Air Control (IAC) Underspeed Error

WARNING: This page does not describe the selected car, but rather 32 other vehicles, including the 2005 Mercury Sable, 2005 Mercury Mountaineer, 2005 Mercury Monterey, 2005 Mercury Montego, and 2005 Mercury Mariner. However, it is still accessible from the selected car via links, so may be relevant.
P1507 - IDLE AIR CONTROL (IAC) UNDERSPEED ERROR

Description:  This DTC is set when the powertrain control module (PCM) detects an engine idle speed that is less than the desired RPM.
Possible Causes: 
  • IAC circuit open
  • Air inlet is plugged
  • Damaged or incorrect IAC valve
  • IAC valve stuck closed
  • VPWR to IAC solenoid open
  • IAC circuit short to PWR
Diagnostic Aids:  The IAC solenoid resistance is 6 to 13 ohms.
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 KE1.
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