Recreational Vehicle Lpg Tank Valve/gauge problems of the 2013 Ford Escape

I was driving home when the engine to my 2013 Ford Escape started smoking enough to engulf the inside of the vehicle with black smoke. The engine then caught fire while I was still in drive. I placed the vehicle in park and jumped out when in a matter of seconds the entire engine was in flames, seconds after that the whole vehicle was on fire. The fire dept. Came to put it out. The fire dept. Left and the fire was extinguished. Approximately 45 minutes later, the car started on fire again. This time it was letting off small explosions' of sparks. The fire dept. Came again and extinguished the fire. I asked them if they had any idea what caused it. One fire fighter's reply was "no idea, I have never seen any thing like this before in my life" the car had 89000 miles on and had been inspected by Ford a few months ago with no complications found in the engine. The heat gauge never raised to make myself, the driver aware of any over heating. The fire started right infront of my home as I was pulling into my driveway while I was still in drive/motion.

Temp gauge runs to h and car stops coolant full.

First incident: August 3rd 2016 while driving 50mph car displayed a engine overheating warning message and slowed down as I pulled off the road. After a few minutes I was able to drive again and the message did not reappear, the check engine light was on. I took the car to kearney person Ford 7303 clairemont mesa blvd san diego, CA 92111 they told me they couldn't find anything wrong and turned the check engine light off. Second incident: driving to work earlier this year 2017 I got the same message that my engine coolant was low, and to slow down because of critical overheating, even though I had just had the car serviced for a regular maintenance check, once again at kearny person Ford. I was driving normally on a road at around 30-40mph but accelerating when the message popped up. I refiled the coolant as the check engine light did not turn on. Third incident: this was the most dangerous time. Critical engine overheating message and low coolant message popped up without warning while driving up hill in traffic going about 20mph on the I-5s at the in California grapevine. The engine nearly shut off and limped on just a couple cylinders as I tried to get to the shoulder. Smoke was coming out from under the hood and the engine was hot. It all happened immediately and without warning, the temp gauge was normal and then bam! overheated with warning messages crippling the car. Driving slowly but the weather was hot it was nearly 110 degrees outside. Seems super dangerous. Because of the lack of warning when these incidents happen. The way that the coolant just disappears, and the smoke and chance of fire.