WHAT IS ECU1 AND ECU 2 ERROR CODE Check engine light on ?

Hello, When you get the check engine light popping up, scanning it with a code reader will give you some diagnostic trouble codes. If you have not done so yet, just scan with a code reader so we can see what your codes are saying. Is there anything the car is doing wrong? Is ECU1 and ECU2 something your scanner said, something that popped up on the dash?