I started up my 2004 Dodge Ram 155 (V6) it madfe a clicking noise and the check engine light came on. it was low on antifreeze so I pu some in and now it clicks every once in a awhile with it running but the engine light is still on.

 

Might want to look at the oil. Antifreeze won't do much for clicking.

 

Go to your local parts store and get the code read. Ya need the code to start the search for the cause.