JustDon

Thanks for the reply. How did you determine that it was the electric drive overheating rather than the gas engine? (Mine hasn't repeated the problem recently as temperatures have cooled, but I'm sure it will so would like to get it figured out.

I'm not *trying* to be dense here (I'm just gifted that way :D ), but... I'm not sure what I'm looking at with that second picture. Can you help me with context for that?

If the coolant temperature sensor is broken, though, wouldn't that result in the displayed coolant temperature being clearly faulty (as opposed to acting like it seems it should)? In any case, is the coolant temperature sensor in a location that is relatively accessible, or is that a massive job to change?

I have a 2014 Ford Fusion Energi Titanium with about 116,000 miles on it. This Saturday when I was driving on the freeway (conveniently around two hours from home, early in the drive to take my daughter to college...), I suddenly got an audible alarm and a red box saying "Engine Coolant Overheat." There were no other accompanying symptoms (engine running fine, no unusual noises, etc.). I pulled off the freeway as soon as I reasonably could and checked under the hood for anything unusual. Coolant level in the overflow tank was fine (right near max), no signs of leaking, fan running as I would expect. I tried restarting it to see if the warning icon had disappeared, but it was still there. I turned it off again and let it sit about 15 minutes, after which the icon had disappeared when I restarted. At this point I put a code reader on the OBDII port to see if there were any codes showing up, but there were not. However, I left the code reader on and connected to my phone via bluetooth so I could monitor the engine coolant temperature as I drove. The car ran fine, and showed coolant temperature fluctuating between about 88 degrees C and 95 degrees C (190-203 degrees F). Outside temperature was in the mid-90s Fahrenheit, so those don't seem like particularly high temperatures. After about 20 more minutes of driving, I got the same audible alert and the same red box, with coolant temperatures showing right where they had for the past 30 minutes of driving. I pulled over again (this time at a convenience store) and we grabbed a bite to eat while waiting for the car to cool down again. When we left, the warning had disappeared, and again, the coolant temperature was showing in the same range. I drove cautiously to the next town, where I rented a car to make the rest of the trip rather than risking another seven hours of driving with a warning I couldn't explain. When I picked the car up on my way home, I drove about a little more than an hour, and received the same message (with coolant temperatures showing mid-80s C). I again pulled over and waited 15 minutes, after which I drove the car home without the warning appearing again (another 90+ minutes), with the coolant temperature again staying in that same range. (The outside air temperature did drop probably 20 degrees, though, with me driving into a storm front. That, of course, may be why I didn't get the same warning again at the end of my drive.) Any suggestions on what may be causing this behavior? With no codes showing up to guide me, and with both the engine operation and engine coolant temperature appearing to be within perfectly normal ranges, I'm struggling to understand what might be going on. Any suggestions you might have will be greatly appreciated. Thank you.

I have a 2014 Fusion Energi Titanium. I am getting a check engine light. When I run a code scanner (cheap Amazon model...) I get a code that says I have a bad oxygen sensor. I believe it is the downstream sensor. I would like to take a look at that sensor and see if I can replace it - but I'm not sure where to find it. Can somebody direct me? Is this a common failure on this vehicle? (I have around 60,000 miles on it.)