Automatic Transmission Control Module problems of the 2018 Chrysler Pacifica

On October 31, 2020 (before our purchase of the van) the previous owner had to take the van to Chrysler for hesitation in the transmission shifting. On June 14, 2021 (only two weeks after purchase), we had to drop it off for intermittent shifting issues with what seemed like skipped gears. No engine light came on, and the van was returned stating an inability to reproduce the issue. On February 7, 2022 we brought the van to Chrysler after taking it in a few times to carmax to resolve the the disabled "start/ stop" system. The light would intermittently come on indicating the system was unavailable, and shifting would be erratic. An inspection and recall work for the pcm was performed. In June of 2023, the uconnect system stopped working intermittently. The gears were still shifting roughly with the shift knob becoming increasingly more difficult to turn. An independent shop found no solution with an unknown timeframe on the delivery of a new transmission. In June of 2023 while driving, the van shut off completely while in motion. After a few minutes, it started up again and drove as if nothing was wrong. June 24, 2023, we took the van to Chrysler with the same issues. At the time there was still a back order of transmissions for the van. Upon contacting Chrysler, we found out that there was a recall effective on the new transmission and the company rush ordered the part to the shop. As well, the uconnect system was also addressed. The issue was fixed. After a few years of reliable service, the van functioned normally with rough shifting and start/stop system failures still an issue. In January of 2024, the van would not start at first try. Often my wife was able to get it started after sitting for awhile. In other cases, changing the key fob helped. Changing the aux battery repaired the issue temporarily. Now it won't start at all. The starter was misdiagnosed by an independent shop with Chrysler finding a failed transmission once again.

On August 7, while I was driving on a state highway, around 30 mph, my van suddenly stopped and would not start again. I was stuck in the middle of the road for about 5 minutes while the car made noises and the check engine lights and other dashboard warnings flashed. After a few minutes I was able to restart my car to move it to a safe location. My "micromechanic" engine light reader gave me codes u0401 and u0100, lost communication with ecm/pcm and invalid data received from ecm/pcm- and said the car was unsafe to drive. I had it towed to the dealership. After about a week, the dealership said they rebooted the computer and test drove the car about 15 miles and it was working again. They said it was safe for me to drive and had me pick it up. I had the car back for 10 days. On August 22, I was attempting to leave work. The car was stationary in the parking garage. When I started my car, the same thing happened - it began flashing and beeping. I was unable to turn the car off or move the car. When I pushed the ignition button instead of turning the car off it would re-cycle and begin beeping again. I ran the micromechanic and it gave me the same codes u0100 and u0401 dealing with ecm and pcm. I had to stay with the car 2. 5 hours to wait for the tow truck and the entire time it beeped and flashed - I was unable to turn it off. I had it towed back to the same dealership, where it still is currently. Both times this occurred the car was not charged electrically but had gasoline fuel.

After a stop, then stepping on the gas and nothing happens. Finally takes the gas and lurches forward. On 03/15/2018 the dealer updated the tcm software,said mine was out of date. Seemed ok until 04/01/2018 when it did the same thing again. Mileage is 3000.

This vehicle with unsafe deadly driving conditions began as a new vehicle at around 1300 miles. Acceleration of Chrysler Pacifica while driving at 55 to 75 miles per hour with the engine of vehicle does not slow down but stays stuck and does not slow down and remains at a high rate of speed. Documented over 350 incidents of this subject Pacifica for 3 years. Often, I could not stop the engine from racing at its highest rate of speed while on freeways and other roads. This vehicles engine does not slow down and begin forced pumping of brakes making the vehicle rise in height and. . Ii could not stop this Pacifica engine from shutdown racing engine until I place the shift mechanism in neutral to slow it down and keep in from crashing into a forward vehcile object. The engine gets stuck in its former highest rate of speed for 30 to 45 seconds. On a good number of occasions I have taken this subject vehicle to ray lathem dealership in detroit, michigan. The dealership put thousands of miles on my leased vehicle and stated they did not know what the safety stuck acceleration problem was. Chrysler would not acknowledge any safety acceleration problems and I had my vehicle tested by software engineers and they advised me that the aforementioned Chrysler Pacifica has defective ut modules, powertrain control pcm reprogram module powertrain control. This Pacifica engine continued to stick causing the engine to race a its former highest rate of spped of 55 or 70 miles per hour. During winter weather like rain, snow or ice this vehicle would turn sideways while getting off the freeway service drive. While this is my 4th Chrysler Mini van I have placed my family children at high risk of being injured in a car accident. I have written the president of Chrysler and all this stress this cost me over 9,500 additional mileage penalties of . 28 cents per mile. . .