I have a 2016 Freightliner Cascadia Evolution. When I turn key over and it cycles, sometimes red triangle and check ECAS pops up. Also, the DEF shows blinking red even though full. I can start and drive but my speedometer and rpm gauges do not function. I can turn off and turn back on and sometimes back to normal. Other times only after several attempts and adjusting the suspension height, it will return back to normal. Please help! Sensor? Leveling? Not getting air?
