High idle when transmission is in park?

I used a scanner and no codes, check the live data and it looks like everything is close to what it should be, Throttle sensor 20% , Fuel Rails within %, MAF at 2.2 when at 2000 RPM, not sure what else to check.

First do a visual inspection of the lines and vacuum hoses and check the throttle body in case something is blocking it open a bit. That would also be a good time to clean the throttle body to be sure it hasn't carboned up.

https://www.2carpros.com/articles/throttle-actuator-service

However, being it was a sudden change I expect it's a vacuum leak. If you didn't find a cracked intake tube or bad vacuum line during the visual inspection the next step is to spray it. Take a can of carb cleaner and after the engine is cold, start the engine, now spray the cleaner at the various vacuum lines and at the intake and throttle body gaskets. Listen for a change in the engine and you have found the leak. I would suspect a vacuum line myself, that age the rubber is getting soft and starting the rot from the heat and age under the hood. You may want to wear gloves when doing the inspection and any repairs, the carbon black and rubber compounds they used then make a real mess if you get it on you.

https://www.2carpros.com/articles/how-to-use-an-engine-vacuum-gauge