Half-start issue seems to be directly related to lower battery voltage, short trips, and restarting within a short time of shutting off.Frustrated here. Have the identical problem, rough start, then slowly shuts down. Usually after a short trip like what I have read on this thread. First issue 5 months back threw DTC P0710 STORED ( FLUID TEMP SENSOR) and they replaced a fluid transmission sensor, seem odd but...BTW, 2018 Platinum Reserve, 25,000 miles, first and only owner. Has anyone had any luck with replacing the gas cap? They say a leak in it may cause the rough misfire shaking. I go back to the dealer in 3 days but without a code (none this time), surely they will be at a loss but I do have an audio of the failed start.
Appreciate any thoughts or ideas..
It happened to me for my 2nd time in 2 years this past weekend. I shut the vehicle down after about 3 hours of driving. And then attempted to restart within about 30 seconds, unplanned but I had to move the vehicle.
I also tend to think it's when the brake and start button sequence is rushed or button not fully depressed for a solid 2 seconds. I likely jumped right back in and rushed the sequence, maybe even pushed both brake and button simultaneously.
Either way, our charging systems don't help and are bad for battery health. Look into bypassing the voltage sensor on the negative terminal. All you have to do is unplug the harness that connects to the terminal. Worked for when I did it.