Overheating

[keynan]

So I'm driving home from 121 yesterday to my house (20 miles maybe) everything is running good so far and I don't really get into it till I get on to beach st by the house I got it up to 80 slowed down pulled into the house and the check engine light comes on overheating sensor comes on and coolant is pouring out on to the ground. once it stops I opened the hood and could see no signs of a hose busted, loose, hole in the tanks, nothing at all. So I turn the e-fan on to help cool the L down and I wait about 2 hours and add new coolant to replace the lost coolant, and I take the truck back out I'm ridding around and the check engine light and overheating light are off truck is running great again so I figure it has something to do with when I get on it so I do it one more time by the house and both light come back on but no coolant leak I park the truck and these are the codes p1260 p1285,p1299
I have the warm tune on the truck now. Does anyone know where I can start looking or do I just need to take it to THE LEGEND (Terry) lol Thanks

[Mark #2]

I would replace the thermostat first, check that the intercooler pump is working should see lots of fluid movement in the intercooler tank.

[BC Lightning]

my guess is sensor that turns on electric fans is out, mine would overheat like that, just have a remote switch turned on at all times until you get the sensor replaced

[L8 APEX]

Yep, if you have an LFP E Fan the blue relay is probably toast. Does the fan come on with A/C? Does it come on when idling at temp? The manual switch is a seperate circuit. If you have the LFP fan harness unplug the blue relay and check for melted pins. It is also common for the block temp sensor of the fan kit to fail.