Stock 2016 OF Tacoma RPM surging up and down on Park. No check engine light.

It started today and it’s been surging from 500 to 1000 RPMs back and forth until I try again and go in reverse a few times and park then again and it resolves itself but it revs a little like 500 to 700 back and forth again. The AC isn’t on either so it’s not effecting it. But it runs fine other then that, it idles fine at a red light or a stop. Just in Park it does that. And there’s no check engine light. Any help??

 

I'd start by disconnecting the battery, clean the throttle body, and reconnect.

 

X2

 

it worked, it’s working fine now. Throttle body was dirty tho but thank you!