So a few weeks ago after sitting in L.A. traffic for 4 hours and then 2 hours on a trail (at night in cold temps and in 4hi) I noticed this on my gauges when we hit our campsite and I shut the engine off. During the whole time on the trail my temps were reading normal and my cooling fan kept coming on when needed. I've seen this once before after the first time I took it off road after only having the Jeep for about 2 weeks. Scared the crap out of me. I'm wondering if it's "normal" or if I should even bother contacting the dealership to check it out. I'm just worried since we have a big trip coming up to Moab the end of March and I'm scared to death I'm going to blow the engine out on a trail! Any help or insight into this would be great!