One problem related to engine clicking and tapping noises has been reported for the 2018 Chrysler Pacifica Hybrid. The most recently reported issues are listed below.
Incident #1 (7/17/2018) - while breaking towards a traffic light that turned from red to green, I attempted to accelerate but heard a loud popping noise, felt the van lurch, and immediately lost all power to the vehicle. Numerous warning lights appeared on the dashboard including engine light & power/hybrid plug-in failure. I was able to steer to the side of the road and break to a stop, and restart 1-2 minutes later. Brought to Chrysler dealer on 7/20 and was told on 7/21 upon pickup that the issue had been rectified via software update. Incident #2 (7/23/2018) - while moving slowly in traffic, I attempted to accelerate as the vehicles ahead of me moved and again lost all power with the same set of errors/warnings mentioned in incident #1. Once again, after 1-2 minutes I was able to restart the vehicle. I brought to a different local Chrysler dealer that same day. Picked up the vehicle on 7/24 and was told that after thorough multi-point mechanical inspection with the fca engineers, the company believed the previous dealer had incorrectly applied the software update. Dealer test drove the vehicle for 20 miles and could not recreate the issue. Incident #3 (8/21/2018) - while again moving in traffic, my wife (with our 1 year old in the back) again suddenly lost all power as mentioned in incident #1 and #2 above, except she also had the steering completely lock up on her. She was able to break to a stop mid-traffic and restarted the vehicle 1-2 minutes later. Soon thereafter I called fca corporate directly and have requested a full repurchase of the vehicle and plan to pursue lemon law remediation if that doesn't lead to resolution. All three incidents are life threatening in nature and have not been diagnosable by multiple Chrysler dealerships working in conjunction with fca engineers. (image provided from incident #2).