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Home >> Ford >> 2012 >> Mustang Base, 2D Coupe, Automatic Trans >> Repair and Diagnosis >> External Pages >> Different car >> Section 7 (Engine Controls - Powertrain DTC Charts & Descriptions (Diesel)) >> Diagnostic Trouble Code (DTC) Charts and Descriptions >> P0506 - Idle Air Control System Rpm Lower Than Expected

P0506 - Idle Air Control System Rpm Lower Than Expected

WARNING: This page is about a different car, the 2012 Ford Pickup, 2012 Ford F550 Super Duty, 2012 Ford F450 Super Duty, and 2012 Ford Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.
P0506 - IDLE AIR CONTROL SYSTEM RPM LOWER THAN EXPECTED

Description:  This DTC sets when the engine idle speed is less than the desired RPM or the actual RPM is greater than 100 RPM below the desired RPM for more than 5 seconds.
Possible Causes: 
  • Intake air restriction
  • Vacuum leaks
  • Exhaust restriction
  • Engine mechanical concern
  • Sludged throttle body
  • Damaged intake throttle actuator
Diagnostic Aids:  This DTC is informational only and it may be accompanied by other DTCs. Diagnose the other DTCs first. If other DTCs are not present, inspect the entire air intake system for restrictions, vacuum leaks, and damage. Repair as necessary. If no concerns are found, clear the DTCs. Repeat the self test.
Application  Key On Engine Off  Key On Engine Running  Continuous Memory 
All Refer to the Description, Possible Causes and Diagnostic Aids for the DTC.
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