no cruise control after diagnosed with faulty throttle position actuator

What is your question?

What would cause the cruise control to not work now? Two days ago the truck was running fine at about 70 mph then the odometer read out "reduced engine power". After having it checked at Auto Zone and being told I had a problem with the throtle position actuator I have no cruise, but ever since restarting the truck it is running perfectly except for no cruise control. The fuse is good. Is it normal for the truck to now run fine, could it just have been a computer glitch?