2014 jku. With 142000 miles. So changed the head and gasket due to a blown head gasket. That part went well. Car runs great until i get the code 394 and Jeep goes into limp mode. Get both engine light and stability control light. So far i have done both cam position sensors, crankshaft position sensor, spark plugs, checked all grounds. Look good. Checked wiring harness. Looks good. Can’t. Help but to think it is caused by the new head. Never had a prob like this before i changed the head. I read intermittent voltage loss. What could cause this? Sick of spending money and time on this thing. Oh yeah. While I’m doing all this i also replaced almost the whole front end.