The key trick it normally a dodge thing but I have not actually tried it with the sonic.
Stop by auto zone or advance auto and they should be able to plug in the scan tool and tell you
If your in Cali those places won't read codes for you.
But Just go out and buy a 10$ Obd blue tooth reader on Amazon and get the torque pro app for 5$
Really? That's stupid. Did not know that.
But ya the blue tooth readers are cheap.