Pulling out of a shopping plaza onto the highway, driving about 20mph at first, the rear of the car started shaking mildly. Within a few seconds the car started shaking excessively, vibrating very loudly. I thought I had 2 flat tires but then the indicator lights came on...the check engine symbol and the "power system problem" I immediately pulled over and checked the vehicle all of the tires were ok. I sat for a few minutes letting it cool down started the vehicle and all of the display warnings were off I turned off the "econ" option and pushed the "ev" (electric vehicle) button hoping if the problem was related to that, those options would now be disabled I very slowly drove it home (about 2 miles). Driving about 55mph on the highway the exact same happened as above except this time the car slowed down almost immediately and the steering wheel got very loose I pulled into the median the rumbling is very concerning it is so aggressive that it sounds like the car is falling apart. It seems like the engine is all messed up. I'm not sure if the options I checked are correct, the options to check for the problems it might include something I didn't check mark or I might have check marked something unrelated. I just did my best to guess. I don't know a lot about cars so maybe you could verify that the information problem areas are correct. Thank you please advise the exact same thing happened.

- Eustis, FL, USA