Cruise Control, O2 SENSOR, Fuel/Propulsion System , BATTERY, If your check engine light is not on when you take it to the service department they say its hard to detect serves needs. Come back when it comes on again. Trouble while driving when using cruise congtrol it excellerate15miles beyond speed set very scary while driving next 30 minutes smell smoke next flames and smoke coming from underneath hood, open door flames and smoke can into jeep. Causing me to hit my head tryng to watch the fire and get out the truck and getting the two kids out the back the we ran then the exploded. The 911 button inside did not work! Now we can't sleep!