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Engine-Codes.com | All About OBDII Engine Codes

P0506 Ford

P0506 Ford - Idle Speed Control System RPM Lower Than Expected

P0506 Ford Comments |  Add Comment
Possible causes
- Dirty throttle body
- Electric throttle control actuator misadjusted or damaged
- Faulty Electric throttle control actuator
- Intake air leak
- Poor electrical connection to the Intake Air Control (IAC) valve
Help with Possible causes What does this mean?
Tech notes
If there are no intake leaks, clean throttle body, adjust engine idle and erase engine code. If the code comes back you may have to replaced the Electric Throttle Control Actuator (Motor) to repair the problem.

There is a factory service bulletin for the following Ford Models:

2005-2007 Ford Crown Victoria
2006 Ford Mustang, Mustang
2004-2006 Ford F-150
2005-2006 Ford E-350
2005-2006 Ford E-450
2005-2006 Ford F-Super Duty
2006-2007 Ford Explorer Sport Trac
2006-2007 Ford Explorer
Ford Factory Service Bulletin OBDII Code P0506
Help with Tech Notes What does this mean?
When is the code detected?
The idle speed is less than the target idle speed by 100 rpm or more.
Possible symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
- Engine hard to start
- Rough or erratic idle speed
P0506 Ford Description

The Engine Control Module (ECM) controls the engine idle speed to a specified level through the fine adjustment of the air, which is let into the intake manifold, by operating the electric throttle control actuator. The operating of the throttle valve is varied to allow for optimum control of the engine idling speed. The ECM calculates the actual engine speed from signals of crankshaft position sensor (POS) and camshaft position sensor.

The ECM controls the electric throttle control actuator so that the engine speed coincides with the target value memorized in the 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 taking into consideration various engine conditions, such as during warming up, deceleration, and engine load (air conditioner, power steering and cooling fan operation, etc.)

P0506 Ford Information for specific Ford models
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FORD Technical Service Bulletins for P0506 code
2004 FORD F-150 Engine (pws) Details
2004 FORD EXPLORER Engine (pws) Details
2004 FORD F SUPER DUTY Engine (pws) Details
2005 FORD CROWN VICTORIA Engine (pws) Details
2005 FORD MUSTANG Engine (pws) Details
More Bulletins Help with Technical Service Bulletins What does this mean?
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