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Home >> Mercury >> 2009 >> Sable Premier, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1255 (Engine Controls - Powertrain DTC Charts & Descriptions (Except Diesel & Hybrid)) >> DTC Diagnosis >> DTC P1507: - Idle Air Control (IAC) UNDERSPEED Error

DTC P1507: - Idle Air Control (IAC) UNDERSPEED Error

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DTC 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 voltage
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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