Same issue. 2013 jeep jkur. Have had pass side exhaust cam replaced, cam phasers all 4, cam sensors both, wire harness repair both, pcm, crank sensor. Still uphill highway speed sets p0394 and c121c codes
Cel and traction control light.
Been trying for a year with no luck. All mopar parts. Dealer had it two months. Now had it at another shop and thought we had it and then 30 miles down the road and boom. Lights again