My car keeps running a p1516 p2135 p1681 when I start the car in the morning an when it sits an cools down have replaced gas pedal assembly an switched throttle body's an still have the problem an my ECM doesn't fall under the build date. Running out of ideas

 

you can find what your codes mean here https://www.cobaltss.net/forums/prob...-merged-12015/

and then post your my car is broke here in the correct section Problems/Service/Maintenance - Cobalt SS Network

this is the performance section not my junk is broke section