p1202 is something called the gas mass sensor. Never heard of that. Are you sure of this code?
p2119 Throttle closed system performance. Never heard of this one neither. Without an advanced scanner, it's impossible to verify if it's the throttle body itself or the pedal sensor. Given the code, I'd try cleaning the throttle body as per this thread:
How to clean your throttle body
p1608 Serial Communication Problem With Device 8 however I was not able to find anything related to this platform. Do you mean P1680? If so, then it might be related:
Hey Recently My Truck Had A Check Engine Light On It Came On On Saturday Afternoon With The Power Reduce Light Also I Hit The Gas And It Did Not Move Turn The Car Off And Back On And I Was Able To Get Going Light Remain On That Day And Sunday Then Sunday Night Light Turn Off I Check The Code On...
www.trailvoy.com
After cleaning the throttle and disconnecting the battery for 30 minutes, recheck if it starts and for codes.