That code is an idle air control overspeed error. It means that the engine idle is out of factory specification. Sometimes the Idle Air Control may have carbon built up so clean it and if that does not fix it, replace it.
p1506 is an IAC (Idle Air Control) error code that comes on when your on-board computer senses an undesired Idle RPM.
iac valve...idle air control valve
On a 2001 Ford Windstar : The 3.8 liter V6 engine has ( 6 engine cylinders )
In a 1995 Ford Windstar : Either the 3.0 litre V6 engine or the 3.8 litre V6 engine
2001 ford winstar sport burning engine oil
3.8 liters ( 232 cubic inch ) V6
There is no "Winstar" - that is simply people leaving out the 'd' when spelling WinDstar
P1506 - Idle Air Control System At Adaptive ClipCheck for vacuum leaks and clean the throttle body, maybe check the iat and maf sensors.
Sticker on the aft drivers side door frame
On a 1996 Ford Windstar : The 3.0 liter V6 engine is rated at ( 150 horsepower ) The 3.8 liter V6 engine is apparently rated at ( 200 horsepower )
first it will cause the car to idle and run rough.It also can cause the check engine to stay on.
No the wire harnas is differant, trying to make it function isant worth the effort.