Havin overheating problem. New water pump new thermostat radiator has been cleaned out really good. Only code that is throwin. New sensor also. At a loss to wat else it would be. Had motor and heads rebuilt bout month ago. First time started since and over heats. Please help. 2000 durango 5.2L

 

Sounds like the head gasket is leaking. Pistons might be pushing carbon monoxide into the cooling system. Take it back!!!