High Engine Temp
A few days ago on my 2008 Grand Cherokee 6-cyl, I got a "Transmission Overtemp" warning while idling in a parking lot waiting on my wife to come out of the store. I then noticed my Temp gauge almost in the red. I immediately turned the motor off. Once I got going, the temp came down. Yesterday, while stuck in a traffic jam, the temp shot back up to almost in the red again. Same thing...once I got moving again, the temp came back down. I first though that the electric fan wasn't coming on. However, when I got home last night, I let the car idle in the driveway and the fan did in fact come on when the temp gauge was right at vertical.
Seems like when air is being forced through the radiator at speed, all is OK. When at idle.......?