idle issues

I drive a 2009 mustang gt with 126k miles and I’m getting the code P2020 and i haven’t been able to find any info on where it is located in the manifold and how to replace it. Ive been looking for a part number to replace it but cant seem to find one. Once i start the car there are no issues...

so I bought my 06 mustang gt about a month ago from a man local, the car has a JLT SERIES 3 intake, which is where I’m assuming the issues are. When I use the tuner my car will crank and then die it won’t hold an idle unless I unplug the mass airflow sensor to the intake, but even then my car...