I have a 2008 F250 6.4 auto. Completely stock, not deleted. I'm getting codes p0713, and p0710, I've changed the sensor, and harness and the code is still there, and the gauge still doesn't work, fan still engaged and won't shift into od. I've checked fuse 35 inside, and 37 under the hood. Has anyone else had this issue?

 

Sensor and harness were purchased at the dealership

 

Then there is a problem with the wiring between the transmission and the PCM.

 

I'm going to check the connection on the trans, and trace wires today. I just wasn't sure if there was another issue that anyone else had run into to narrow down where to look.

 

Tracing the wires is usually a waste of time. You need to check the wires for continuity and shorts to ground and to power.