Automatic Transmission Control Module problems of the 2018 Jeep Wrangler

Displays, "service shifter". Often followed by many, mostly random warnings, gauges fluctuate wildly, and disabled stop/start, traction and stability control; and sometimes loses power steering, and stalls and won't restart. The stereo volume, wipers, and cabin fan speed also can fluctuate wildly; worst case. This issue first appeared after going through a puddle, and seems to be exacerbated by high emf areas; this is only corollary. This vehicle has never been used roughly or off road. The obvious dangers are, spontaneous maniacal warnings are a significant distraction to driving; if stop/start is not disabled vehicle will not start after stop at intersection, causing disruption to traffic; if power steering randomly stops working, which occurs while stopped or driving, the vehicle is nearly impossible to drive, and can only practically be driven by a strongman athlete. The coup DE grâce where everything goes berserk, is usually when parked and attempting to reset the condition. The problem has not been reproduced by a dealer or service center; I have spent days inspecting grounds, harnesses, and inspecting, cleaning and replacing connectors. There's also a long list of mostly random codes for nearly everything, including the persistent lost communication with tcm. Up to October 2022 and 66,000 miles the only warnings or codes were for, wheel sensor (rep under warrantee), and "small leak in vapor recovery system" (leaky gas cap). A month+ after the warrantee expired, at about 66,000 mi, the vehicle began to generate random warnings and codes, and became unbearable (and dangerous) to drive. My observations and inspections and limited testing (haven't probed system circuits directly) lead to an assertion that the problem is system wide; many wildly various, mostly non repeatable, codes are recorded, systems that shut down are wildly various and not always repeatable; like there's nothing specifically or consistently wrong-but everything is failing. 5v reg in tcm?.

The contact owns a 2018 Jeep Wrangler. The contact stated while driving at 5 mph all the warning light illuminated on the instrument panel. The contact stated he shut down the vehicle and restarted, when the vehicle restarted the check engine warning light was still illuminated on the instrument panel. The vehicle was taken to the dealer for diagnosis, and they stated that no failure was found, but a software updated was done because 60 plus warning code where storage in the computer, but the failure reoccurred, the vehicle was taken to another dealer again, they stated the same as the first dealer that 60 plus code had storage in the computer and not failure was found. The manufacturer was contacted, and they stated that the vehicle needed to be diagnosed. The failure mileage was 54,000.

My 2018 Wrangler accelerates when not on the gas pedal, and both the engine light and electronic throttle light comes on. My Jeep has been to the dealer 4 times for this issue and it still goes unfixed. It has been to an independent service center once, and they diagnosed the pcm (powertrain control module) as failing. This issue is very dangerous for myself and anyone else on the road as my Jeep will accelerate at random.

Vehicle was driven and put into park. When restarted, even though I was able to move the gear shift, the Jeep would not move out of park. One dealership said it coded as the transmission control module and supposedly replaced it along with a transmission flush. Left and drove the Jeep, but it felt like it was always trying to shift into gear. Drove about 130 miles and had to get gas even though I was at 3/4 tank when I picked it up after "repairs". Turned the vehicle off, got gas and restarted it. Again, would not go into gear but I was able to move the gear shifter.