After cleaning throttle
My car has 139000 miles.
My car has an automatic transmission.
This may be caused by a dirty or failing idle air control valve/module. As you may know, this is a unit that monitors the air intake as it is mixed with fuel prior to being injected into the engine. When this is not working properly, this can cause the air/fuel ratio to be out of balance causing a spike in idling as you have experienced. I would recommend having an expert, such as one from YourMechanic, come to your location to diagnose and repair your high idle issue.
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