I have read the manual but there is nothing about calibrating the thermometer. Mine reads about 3 degrees cold. Is there any way to calibrate it?
That is kind of dumb if you ask me. I have 2001 Grand Cherokee that updates to the current temperature as soon as the key is turned to on. The sensor sits in front of the radiator and I have never seen it raise when it is just sitting while running.The sensor will always be slow to update after sitting. The vehicle will not update the temperature reading unless the vehicle is moving. The truck will have to be moving over a certain speed even before it thinks about changeing the display. The do this to avoid the sensor picking up engine compartment heat when the truck is not moving.