He jeep doesn't like to start in the cold at all ! And always gives me trouble and today nothing out of it! Now check engine light is in??

 

Turn the key on and off 3 times with the final turn to the on position...watch your odometer...it will spit out any codes you may have, then we will be able to start diagnosing it. If its hard starting, is probably a bad battery and or bad ground..Both pretty common and easy to fix but let's see what the codes say.