Engine reviving high when transmission is in park

Hello,

So, how high does it idle, when in park? What about when you put it in drive?

Does it run rough as you drive?

This could be an issue with the throttle actuator. Is your check engine light illuminated?
If so scanning and retrieving the code(s) can help with the diagnostics.

Here is a guide on how to retrieve engine error codes:

https://www.2carpros.com/articles/checking-a-service-engine-soon-or-check-engine-light-on-or-flashing

Let me know little more details of what you have been experiencing.
Thank you.

I think a good first step would be to scan and retrieve the code(s) for the check engine light. This issue could be due to a faulty within the throttle actuator and it is not providing proper signal to the ECM.
You can take it to your local auto parts store, and they can scan the engine light for you.
Let me know what code that you find.

You are welcome.