Welcome that is a very rare problem it was the early eco.. the main problem is crank shaft main brgs and con rods tune it and get rid of the egr and sensor problems I have a 18and no problems it is tuned since new
Did u clear the code and did it come back there is a large plug right above your feet check that one other than that see the dealer it should b free fix
I hate to tell you the only thing that really fixes the eco is a tune it fixes all the problems you and every one else is having how many miles r on your jeep??by the way welcome to the group