P0505 FORD - Idle Control System Malfunction
- Faulty IACV-AAC valve
- IACV-AAC valve harness is open or shorted
- IACV-AAC valve circuit poor electrical connection
2005-2007 Ford Crown Victoria
2006 Ford Mustang, Mustang
2004-2006 Ford F-150
2005-2006 Ford E-350, Ford E-450, Ford F-Super Duty
2006-2007 Ford Explorer Sport Trac, Ford Explorer
Ford Factory Service Bulletin OBDII Code P0505
When is the code detected?
- Engine Light ON (or Service Engine Soon Warning Light)
- Engine hard to start
- Rough or erratic idle speed
P0505 FORD Description
One step of IACV-AAC valve movement causes the respective opening of the air by-pass passage. (i.e. when the step advances, the opening is enlarged.) The opening of the valve is varied to allow for optimum control of the engine idling speed. The crankshaft position sensor (POS) detects the actual engine speed and sends a signal to the ECM. The ECM then controls the step position of the IACV-AAC valve so that engine speed coincides with the target value memorized in ECM. The target engine speed is the lowest speed at which the engine can operate steadily. The optimum value stored in the ECM is determined by takig into consideration various engine conditions, such as during warm up, deceleration, and engine load (air conditioner, power steering and cooling fan operation).
P0505 FORD Information for specific Ford models
P0505 1998 FORD F150
P0505 1999 FORD F150
P0505 2000 FORD F150
P0505 2001 FORD F150
P0505 2002 FORD F150
P0505 2003 FORD F150
P0505 2007 FORD FREESTYLE
P0505 2006 FORD FUSION
P0505 2008 FORD FUSION
P0505 2009 FORD FUSION
P0505 2010 FORD FUSION
P0505 2011 FORD FUSION
P0505 2012 FORD FUSION
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