Vehicle had been operating less than 5 minutes. When I was on an on-ramp for a left entrance to a highway, several warning lights illuminated in addition to messaging on my dash. The car entered ‘turtle mode’ which extremely limited the speed of the vehicle. I immediately pressed the button for my hazard lights to come on, but they did not operate correctly. They flashed so rarely that they did not warn vehicles behind me that I was having an incident. During this incident, the vehicle speedometer was inoperable, displaying ‘— —‘ instead of a speed. I was lucky to be able to pull to the shoulder, but with the narrow shoulder and my child in the car I felt safer limping off the highway using primarily the shoulder. I was terrified and had some cars nearly hit me/honk as I was going approximately 10 miles per hour on a 55mph roadway. I have seen similar reports on online forums for chrysler pacifica minivans, so I am not the only one to encounter the issue. The vehicle has also at times refused to go into gear while in Park, which is a related problem but I don’t deem it a safety issue. The problem is intermittent and the service center is able to see ‘codes’ when they examine the vehicle but as the issue is intermittent they have returned the car to me twice with no repairs performed since it didn’t occur while they had it. The warning lights and turtle mode occurred simultaneously or within a few seconds. I have a video during the incident. I can see the fuel gauge needle rising and falling wildly, turtle mode, a picture of a wrench, check engine, parking brake, brake, collision avoidance, ABS, and others. Each time the vehicle has gone in for service they have seen and cleared codes but they did not come back immediately, so no repairs were attempted. It is in the shop again currently and I have escalated to the manufacturer to hopefully get greater assistance.