We own a 2015 ram promasters. while driving on the freeway at various speeds. tech experienced a sudden loss of power. on the dash appeared a yellow check engine light and a red symbol ( ! ). a message read "service required - transmission service". as the tech attempted to exit the freeway, afraid that the van might stall with incoming traffic. he made a safe exit off the freeway. pulled over, turned off ignition and was able to restart the car in hopes that the trouble would clear. the red symbol ( ! ) disappeared and power was restored. was able to drive back to company.