Luz Check Engine

Hello everyone. I have a problem: I have a 1995 Honda Accord automatic. The issue is that when I leave it in the sun in the morning with everything closed up, the car gets warm inside, as is normal. However, when I go to turn the key to start it, the check engine light stays on, and therefore the car won't start. It takes a long time for the light to go off before it finally starts. I already replaced the main relay, but the problem persists.

Does anyone know what the problem might be?


Thanks