2020 Chrysler Pacifica power train problems

“File an Immediate NHTSA Safety Complaint (Do This Tonight) The vehicle intermittently stalls completely while decelerating or braking at low speeds when the engine is warm. The dashboard flashes an ACC/FCW warning as the engine dies. This requires a full shift into Park to restart in active traffic, creating an imminent crash hazard. The vehicle has only 26,000 miles. Chrysler Case #98023933 is refusing to authorize diagnostic flight data logging or precautionary repairs because the dealer cannot immediately replicate it." •”

“On October 7, 2024, my vehicle was serviced at Coastal Chrysler Dodge Jeep Ram for a front-end rubbing/scrubbing noise that increased with speed. The dealer diagnosed both front hub assemblies as failed and replaced both front hub assemblies. I was charged a total of $2184.41 for the repairs, including parts and labor. In less than two years, I again experienced significant front-end noise and safety concerns. On May 19, 2026, because I urgently needed the vehicle and was unable to obtain a timely appointment with the dealership, I took the vehicle to a well-regarded independent repair facility, Koala Automotive Repair LLC. Their findings were extremely concerning. The mechanic documented that: The front wheel bearing was completely worn out. The axle had ripped due to contact with the strut assembly. Bolts on the hub bearing assembly were “very loose” and reportedly “finger loose” The vehicle owner stated that the hubs had recently been replaced by the dealership The independent mechanic further advised that the components replaced in October 2024 should still have been under dealer warranty, and that the second repair involved the same components and directly…”

“The start/stop system fails while car is running. Power not delivered appropriately resulting in check engine light coming on and entire car shaking. Only 62k miles. Started at 58k.”

“The hybrid propulsion system on my 2020 Chrysler Pacifica Plug-In Hybrid has repeatedly failed, resulting in sudden and complete loss of power while driving at highway speeds. The vehicle enters full limp mode, displays a red turtle warning light, and the motor cuts out entirely, creating a serious collision risk. The failure occurs without warning and has happened on multiple occasions. The root cause has been traced through escalating component failures: first the Power Inverter Module (PIM) was found to have an internal failure disabling regenerative braking and causing the motor to cut out; subsequently the battery charging module was found to be failing, causing the high-voltage battery to drain to 0% and stall the vehicle. Both components were replaced by an authorized Stellantis dealership under warranty. Despite replacement of the PIM, the charging module, and ultimately the transmission, the defect has not been resolved. The vehicle has been confirmed defective by the authorized dealer on each visit and has been subject to a STAR (engineering escalation) case with Stellantis. Warning symptoms include the red turtle warning light, check engine light,…”

“This submission supplements my prior NHTSA ODI complaint regarding the same vehicle and loss-of-motive-power condition. On Nov 8, 2025, the vehicle experienced a loss of propulsion at highway speed, creating an immediate safety risk. The vehicle could not maintain speed and required evasive action with no propulsion to avoid traffic hazards. Following the incident, the vehicle was inspected and stored diagnostic trouble codes P0A3F-00 and P0A43-00 were retrieved, relating to drive motor position sensor / resolver signal loss or degradation. These fault codes are associated with loss of propulsion and indicate a propulsion control signal-path fault, rather than a condition resolved by software calibration alone. The vehicle remains available for inspection and is out of service at a dealership due to unresolved safety concerns. Since my prior ODI complaint, I provided formal written notice to the manufacturer describing the incident, the retrieved fault codes, and the safety implications, and requested a written response. Receipt was confirmed by USPS certified mail on January 6, 2026. No written response was provided, and repeated attempts to contact the…”

“Transmission shifts very hard from 2nd to 3rd gear and 4th to 5th gear at random times and at random speeds. Sometimes it occurs in parking lots at less than 15mph and other times at highway speed above 65 mph while cruising. This has caused the engine and transmission mounts to fail prematurely. When it was taken to the dealership multiple times, the service department said they could not replicate the issue but opted to reset the computer anyways. This fixed it for about 2 weeks before the issues came back. A computer reset will wipe the transmission shift learning but with normal daily driving it comes back. This should not be considered "normal" or expected behavior.”