More likely it's simply a dirty IAC (idle air controller). The IAC provides all the air to the engine when your foot is not on the accelerator pedal so your symptom points to that. The IAC is bolted onto the throttle body with two small torx screws, on the passenger-side of the throttle body, closest to the valve cover. Remove it, gently clean its solenoid actuated plunger (don't push/pull/turn the plunger) with throttle body cleaner and a rag/brush, then clean the hole in the throttle body its plunger fits into. Once it's clean, use the remainder of the can of throttle body cleaner to clean the interior of the throttle body per the instructions on the can.
There is no need to remove the throttle body from the engine to do any of this. Good luck.