Check engine light triggered when hood of car was opened?

My car has been sitting for a while because it is showing the check engine light, engine power reduced light and the traction control light. Today I decided to start it up and just see if the lights were on and when I did it wasn’t on. So, I decided to go and drive it around and when I did I was expecting the light to come back on but it didn’t. So I went back home and I parked it and my dad came out and asked me to pop the hood and as soon as we popped the hood and lifted it up the engine power reduced light, check engine light and traction control light came right back on. I really don’t know what’s causing the problem anymore I've tried everything.