Most likely you have a cooling fan issue. These fans pull air over the radiator to cool down the water, when you are moving there is air being pushed over the radiator and cooling down the water or coolant. when your stopped and the fans are not working the temp goes up. You may also notice the A/C won’t be as cold as well. You will need to get it in for an inspection to determine if the fans are bad or the electronics that make them work.
#fans #temp #poirierspromise