The improperly started engine could result in a loss of motive power increasing the risk of a crash or the unburned fuel in the catalyst may ignite increasing the risk of a fire.

Engine And Engine Cooling — Exhaust System — Emission Control — Catalytic Convertor
Hybrid Propulsion System

Date Announced
OCT 19, 2018
Vehicles Affected
10,021
Chrysler Recall #
U94
NHTSA Campaign #
18V740000
Summary
Chrysler (FCA US LLC) is recalling certain 2017-2018 Chrysler Pacifica Plug-in Hybrid Electric vehicles (PHEV). After the vehicle has been operating in PHEV propulsion mode, the gas-fueled engine may not restart properly resulting in unburned fuel entering the exhaust catalyst.
Actions
FCA will notify owners, and dealers will update the powertrain controller module software, and inspect and replace the catalytic converter as necessary, free of charge. The recall began November 15, 2018. Owners may contact Chrysler customer service at 1-800-853-1403. Chrysler's number for this recall is U94.