Ford Repair Questions? Ask a Mechanic for Answers ASAP
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This code is for a bad thermostat that is not allowing the engine to get to full operating temperature therefore the PCM never enters closed loop so it will idle high as a result.
Replace the thermostat and reset the idle adaptive stategy by unhooking the battery for ten or fifteen minutes and clean the throttle body bore and throttle plate with some intake cleaner and it should be good to go.