Dodge Intrepid P Codes (Powertrain) P0800 - P0899

I Am Having Several Problems And I'm Not Sure If They Are Connected. When Cold, The Car Wants To Start Hard. It Will Crank And Roll...

Where Is The Transmission Pressure Switch Located And Is It An External Sensor That I Can Change I Am Getting The Code Po841= Transmission...

Replaced Crankshaft, Cam Shaft, O2 Upstream And Atc- Transmission Sensor And Still Getting Codes Of P0016 Shows Same Code Of P0016 Two Times...