My check engine light is on and stays on. Seems to be running a little hot 50%

What are the trouble codes? Go to a national auto parts chain and get a free code retrieval.

Several things could cause it to run hot with the CEL on. Restricted convertor, sticking thermostat, etc. It would be only a guess as to what is wrong with the information you have given. Parts Guy is correct, the first step is to have a read of the computer performed, second would be to inspect and test the system it indicates the fault is in. Testing is always cheaper than guessing when it comes to auto repair.