Many on the forum have mentioned that cleaning the IACV with carburetor cleaner can solve some idle problems.

See procedure described by Forty04 here:

https://www.hondacivicforum.com/m_523561/tm.htm

 

its ur throttle position sensor and u have 2 ways of changing it
1) take the 4 bolts and unclip sensor and vacum lines and swap the whole piece
2)take a dremel or a hacksaw and make a dash into the 2 rounded bolts holding the senor on and then use a flat head to remove screws and just change sensor.