One problem related to engine belts and pulleys has been reported for the 2018 Chrysler Pacifica. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2018 Chrysler Pacifica based on all problems reported for the 2018 Pacifica.
Came to full stop at a light on a 2 lane highway. There was no one in front of me and one care behind. Almost immediately after stopping for the light, the engine stopped, the transmission indicator light flashed the light under "d" and the gauge cluster flashed multiple lights. I can only remember seeing fwc or fcw flashing but there were other lights. Auto start/stop was not disabled so I was initially not surprised by the engine stopping at a light. To restart, I had to place transmission back in "p", hold the brake and push the ignition. I then, despite having our seat belts on, had to disengage the parking brake by pushing the button. This usually happens automatically when the vehicle is placed in "d". Once we returned home, the driver's side power sliding door would not operate. We had to open it manually to get my son out. The passenger's side worked like it should. Both these things have happened to my wife (the primary driver) several times and reported to the dealership. They have been unable to replicate the problem or fix it.