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My truck has been Overheating and seems to be leaking coolant from an unknown place. Radiator doesn't look cracked I've replaced my thermostat as the "Service Engine Soon" light came on and the code that was pulled was for my thermostat. I've checked the hoses from top to bottom and it doesn't seem that they are leaking. Thermostat housing is not leaking either.
 

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there are two water temp sensors. a one wire and a two wire. the one wire is for the dash gauge and the two wire talks to the computer. what was the P code thrown? the sensors go bad over time. if it's the two wire sensor, the truck will run rich. if it was the other, the you would get an almost instant hot read, or it wouldn't lift the needle depending on fail open or short. you make certain of a failure with a multimeter. the two wire test is more complex, but still need a meter. either one can leak.
 

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More info needed. When does your Titan overheat? Just normal driving? When sitting still?

Does the clutch fan work? When the engine is hot, try to turn the fan. It should be stiff to turn.
 
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