Service electrical throttle control

Wouldn't your vehicle possibly have a powertrain warranty from Chrysler still? 5 years / 60,000 miles? Depends when originally purchased, of course. That's what I'd try first!

Could check cylinder head gasket. Not so sure cleaning will be your answer

Check first for coolant leaks Check how fan is operating along with thermostat Would be happy to look at 773 549 7777