Bought a 2021 Ram 1500 with 5.7 e-tourque . Everything fine until the engine overheating light comes on and stays for 30-45 seconds and goes away , switch to engine info display and the next time it does it the temp is at 255 degrees and again for same amount of time and goes away . Usually does it on the interstate around 80 mph but has done it at other times also if you run it hard . Made an appointment and took to the local Ram dealer and no codes were stored and of course didn't overheat when test drove . Has done it several times since also . has 42,000 miles so good thing I bought extended warranty . Anyone else have similar problems , I need help ! thanks