4.6 07 classic P0128 code

[Za Sa]

Hello i recently got a check engine light and seen the code was P0128. I have already changed the thermostat, coolant, and coolant temp sensor.

But it still reads about 185 never above that. Its an 07 classic v6 260k miles. No mods have been done to the truck. Any idea what it can be?

Thank you

[dna9656]

Sounds to me like it's running a bit cool. 195F is the neighborhood you want to be in. Get a calibrated thermometer and  measure your coolant. 195 is where oil likes to be....