Cooling fan isn't working, check engine light is now on

My cooling fan stopped working a couple days ago and I have been trying to fix it.

I have checked:
The relays (they click when the car is turned to "on)
Power to the connector for the fan
Fuses
Fan motor

All is good

Replaced the coolant temp sensor, replaced the coolant that came out doing that, ran it for a couple minutes, and now the check engine light is on, and the fan still isn't doing anything. I am totally lost