I have thought a few times mine was reading high because it was indicating a temperature higher than the radio station was saying. However, on the one occasion I was mindful to check, when I pulled into my driveway the indicated temperature from the truck matched my thermometer at the house. Exactly. I suppose they could both be off.
It does seem slow to stabilize after first starting.
Regards,
Dusty
2019 Ram 1500 Silver Billet Laramie, Quad Cab, 2WD, 5.7 Hemi, 8HP75, 3.21 axle, 33 gallon fuel tank, 18 inch wheels. Build date: 17 April 2018. Now at 020818 miles.