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I guess what we are all trying to figure out is why you don't just press the button to clear the code , or better yet , press it to get the code ..
You disconnect the battery and you lose all memory , including your radio code..

Kinda like pulling the motor to change the oil..

you mentioned that you changed your cruise control/idle. I assume that means throttle body actuator.
the computer on your car has to "code" the new actuator. this can be done at the dealer...or you can turn the key without starting the engine and let it sit for 90 seconds. the computer will communicate with the TBA. then start the engine.
let me know if it works for you.