I'm getting a CEL for my coolant temp sensor in a 96 Civic LX, and I called Honda for a price, but apparently there are two sensors; one on the thermostat housing, and one on the head. I have only ever heard of the one on the thermostat housing, but now I'm confused as to which one I need. Will only one throw a CEL, or how do I find out which it is I need? Thanks for any help.