2006 Pontiac Montana Starting Disabled

Mbeards

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My 2006 Pontiac Montana shuts off at times. No warning. Just shuts off and will not start. Will not spin over. It says starting disabled. Just does this occasionally. Stop... wait 1 minute... and it starts back up and runs fine for another few days.
It will do it running 10 mph or 60 mph. I have removed the steering wheel and performed tap and wiggle test around column, BCM, ignition and other wiring. Could not get it to act up. Thanks for any help.
 
have you tried other ignition keys?
have you replaced the key sensor?
 
Yes I tried another key that was in better shape. Did not help. I have not replaced any parts. Is there any way to check key sensor? I have wiggled it and tapped it to check for loose connection.
 
I can unplug the key sensor and the car keeps running and the starting disabled light does not come on, or I can switch off while sensor is unplugged and if I turn the key fairly quickly, it will start up. If I wait 30 seconds it will not restart until I plug it back in. Looks to me like a faulty key sensor will not shut the car off.
 
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