P1506 FORD Idle Air Control Overspeed Error

Possible causes
– Faulty Idle Air Control (IAC) valve
– Idle Air Control (IAC) valve harness is open or shorted
– Idle Air Control (IAC) valve circuit poor electrical connection
Tech description
The P1506 code means that the engine idle is out of factory specification. Sometimes the Idle Air Control (IAC) may have carbon built up. Disconnect the car battery, remove the valve, clean, re-install valve, and drive the vehicle for about 5 minutes with the headlights and A/C ON to get the idle relearned.
If the problem persist, the IAC valve may need to be replaced.
Symptoms
– Engine Light ON (or Service Engine Soon Warning Light)
P1506 FORD OBD Code Description

The P1506 code is set when the Engine Control Module (ECM) detects engine idle speed that is greater than the desired rpm.

FORD Related P1506 code
1999 FORD ESCORT Vehicle Speed Control:cruise Control
2000 FORD CROWN VICTORIA Fuel System, Gasoline:carburetor System
2001 FORD CROWN VICTORIA Fuel System, Gasoline:carburetor System
1997 FORD EXPEDITION Unknown Or Other
1997 FORD F SERIES Unknown Or Other
1998 FORD EXPEDITION Unknown Or Other
1998 FORD F SERIES Unknown Or Other