Jeep Wagoneer start-stop problems

Filed Oct 23, 2026 · Electrical · 38,000 miles · AL

The contact owns a 2024 Jeep Wagoneer. The contact stated that upon coming to a stop, the engine Auto STOP/START system engaged; however, the engine failed to restart automatically and required to be manually restarted. The contact stated that the failure was a recurring failure. The power steering warning light was illuminated after the failure. The vehicle was taken to the dealer; however, the service personnel refused to provide the diagnostic information because the contact declined to pay for the diagnostic test. The manufacturer was notified of the failure, a case was filed, and the contact was awaiting a callback from the manufacturer. The failure mileage was approximately 38,000.

Filed Oct 6, 2026 · Electrical, Engine · NC

I am writing to formally submit a dangerous and sudden electrical system failure on my 2024 Jeep Wagoneer. I purchased this vehicle brand new from Lee Jeep in Wilson, NC and it currently has only 38,000 miles—just 2,000 miles past the standard factory bumper-to-bumper warranty. This issue represents a severe safety hazard and appears to be a direct, consequential chain reaction resulting from a dealer-performed service and software flash completed just 1,000 miles ago. Chronology of Events: 37,000 Miles: The vehicle's thermostat failed. Lee Jeep replaced the thermostat and performed a required computer system software update. 38,000 Miles: Immediately following these updates, the vehicle began completely shutting down and stalling at stoplights and stop signs. Simultaneously, the Electric Power Steering (EPS) completely cut out, leaving me stranded in active traffic with heavy, unassisted steering. Current Status: The dealership diagnosed a blown main engine fuse and is demanding $450 to replace it. They have refused to cover this under a goodwill adjustment, claiming their local branch "cannot do it." A full vehicle shutdown and loss of power steering at intersections puts my life and the lives of my passengers at immediate risk. Unresolved Root Cause: A high-amperage engine fuse does not blow without an underlying cause. I am deeply concerned that charging $450 to swap a fuse without diagnosing the systemic current spike—likely tied to the recent software update or the auxiliary stop-start battery logic—will leave me stranded again. Proximity to Warranty: Given that the vehicle is a 2024 model and barely past the 36,000-mile mark, a catastrophic electrical failure of this nature should be covered by the manufacturer.

Filed Sep 23, 2026 · Electrical · SC

While driving, vehicle suddenly displayed low voltage and "power saving mode" error messages. Multiple systems shut down including AC and radio. With engine stop/start disabled, engine died while slowing to a stop, automatically engaged parking brake, and vehicle shut down. Was able to restart and limp home. Vehicle would not re-start after shutdown. Battery was completely discharged (<9V) and still hot to the touch 4 hours after turned off. Battery tested good, but was replaced out of caution. Current static battery voltage 12.3V. Charging voltage while running 13.4V. Voltage while running with heavy electrical load (AC, radio, heated seats, headlights on) 12.9V. Believe this to be related to known issues with eTorque generator

Filed Aug 30, 2026 · Electrical · GA

Vehicle Information: 2022 Jeep Wagoneer (5.7L V8 eTorque Mild-Hybrid System)Component Affected: Electrical System / Hybrid Propulsion System Defect: My 2022 Jeep Wagoneer continuously experiences sudden engine stalling and unexpected shutdowns while operating in Auto Start-Stop mode. When the vehicle comes to a complete stop at a red light or intersection, the engine shuts off normally to save fuel. However, when I release the brake pedal to accelerate, the vehicle fails to restart automatically. Instead, the vehicle suffers a total loss of power, drops the transmission directly into Park (P), and abruptly engages the emergency parking brake. This creates an immediate, severe safety hazard as it leaves me completely stranded in active traffic and at busy intersections. To get moving again, I am forced to completely cycle the push-button ignition manually. Additionally, the vehicle regularly fails to remote-start, turning itself off immediately due to the electrical fault. A diagnostic scan reveals DTC P0B42 (Hybrid/EV Battery Voltage Sense "B" Circuit Low). This dangerous stalling pattern directly matches the active federal probe under the federal safety agency Investigation PE24018 regarding 2022 Jeep Wagoneer 48-volt electrical and power distribution failures.

Filed Jul 31, 2026 · Electrical · 39,000 miles · MN

The contact owns a 2023 Jeep Wagoneer. The contact stated that the vehicle intermittently went into park(P) and turned off while merging into traffic with the message "Stop/Start Required" displayed. The vehicle also shut off unexpectedly while idling in park(P). The contact was forced to restart the vehicle to resume normal operation. The vehicle was initially taken to a dealer, and the failure was attributed to the gasoline in the fuel tank; however, the failure returned the following day. The same dealer later diagnosed the vehicle with a defective auxiliary battery inside the alternator. The dealer refused to honor the warranty, prompting the contact to seek repairs from an independent mechanic. The part to repair the vehicle was currently on a national backorder, and there was no estimated date for the parts to become available. The manufacturer was notified of the failure but only directed the contact to a parts website; however, the necessary part could not be located. The vehicle remained unrepaired with the independent mechanic. The failure mileage was approximately 39,000.

Filed Jul 21, 2026 · Engine · MD

The engine shuts off unexpectedly when the automatic start stop system engages. At the same time the engine shuts off, the power steering warning light illuminates and steering assist is lost. The vehicle must be restarted to regain power steering and continue driving. This has occurred on multiple occasions, including while the vehicle was slowing to a stop in traffic. The sudden loss of steering assist while the vehicle is in motion presents an immediate safety risk to the driver, passengers, and surrounding traffic. This appears to be a widespread issue. Other 2024 Jeep Wagoneer owners have reported the same combination of symptoms, sudden stalling paired with power steering warning lights, in complaints already on file with the federal safety agency. Suspected causes reported by owners and dealers include a failing 12V or auxiliary battery, a Powertrain Control Module fault, and a Power Distribution Center or wiring fault.

Filed Apr 25, 2026 · Electrical, Engine · NY

It seems that when the outside temperature is very warm/hot, when turning the car on or when idling at a traffic light or driving at very low speeds, on occasion the car will abruptly and without warning, shift itself into Park and the emergency brake activates. I took the vehicle in for repair on 10/23/25 and was told there was a "thermostat internal failure" and that the "thermostat assembly" was replaced. I was just recently traveling in Florida ( reside in NY) and the exact same problems occurred with my vehicle which I can only assume was due to the warmer temperatures that my vehicle has not been exposed to since the last repair as I reside in New York. I feel it should be worth mentioning that when turning OFF the auto start/stop button, the problems occurred less frequently but STILL happened on occasion. I've also had 3 other times when the "check engine" light came on. I was told that the first 2 were related to software updates with the transmission. On the other occasion, a "valve body" was replaced. I'm unsure if any of these were related. I've also had to replace the auxiliary battery but I don't think that's related so I didn't upload that file. Although I'm taking the vehicle to be repaired today, I took it in on 04/14/26 because the check engine light came on while in Florida when the car shifted itself into Park and the Emergency Brake was activated. The check engine light almost never comes on when this happens which I was told makes it difficult to diagnose issues. I didn't know how long this info is stored so I took the vehicle in upon returning to NY and was given a Summary Report after they hooked up a scanner. I couldn't get an appointment until today

Filed Jan 28, 2026 · Electrical, Engine · OK

My 2022 Wagoneer has stalled out 3 times at intersections as a result of the automatic start/stop. This is extremely dangerous! I have been stranded in the intersection 2 out of the 3 times until I was able to turn off/on the vehicle and trouble shoot it.

Filed Jan 15, 2026 · Engine, Fuel system · IN

My 2024 Jeep Wagoneer Series 2 frequently stalls while coming out of idle, such as at traffic lights. This is not the auto stop-start feature and happens whether or not auto stop-start is deactivated. Usually, after being by stopped, as I am getting ready to start moving again, the vehicle will slightly rev or try to lurch forward before stalling out. This turns the engine off, throws the car into park, and activates my e-brake. It happens before I press the accelerator so the car is not moving more than a mile or two an hour. This problem is dangerous because it creates a risk of accidents with other vehicles. When the car stalls in this way, I must confirm the car is in park, press the brake, restart the engine, deactivate the e-brake, and shift the car into drive before proceeding through the intersection. This takes a few seconds and if the driver in the car behind me isn’t paying attention and think I am starting to move, he or she could rear-end me. This problem has happened more than a dozen times (so not every time I drive but frequent enough to be a pattern). It can happen when I have been driving for a while and the engine is warm. There is no way for me to predict in advance when it will happen. It can go weeks without happening or happen twice in the same day. It does not activate any dash warnings (such as service engine light or an error code) that I can see. I have taken my car into the dealership twice for idle related issues including once for this exact problem. The last time, the dealership found misfires on all cylinders, both catalytic converters coming apart from the inside and 02 sensors that had melted from overheating. The dealership replaced all of this. My vehicle still stalled on the way home from the dealership. This time, I detected a strong rubber or plastic burning odor when I got home. The vehicle has less than 12,000 miles on it and was bought new less than a year ago. I attach last repair invoice.

Filed Dec 12, 2025 · Brakes, Engine · 10,000 miles · NE

The contact owns a 2022 Jeep Wagoneer. The contact stated while driving at slow speeds, the Automatic Parking Brake erroneously activated, and the vehicle suddenly stalled. The contact shifted to park(P) and restarted the vehicle. The check engine warning light illuminated, and the engine Auto START/STOP message was displayed. The contact stated that the failure had occurred on several occasions. The vehicle was taken to the local dealer on several occasions to be diagnosed, but the cause of the failure was not yet determined. The vehicle was not repaired. The manufacturer was notified of the failure, but no assistance was offered. The contact was informed that the VIN was not included in the federal safety agency Action Number: PE24018 (Electrical System, Hybrid Propulsion System, Engine, Engine and Engine Cooling), which the contact related to the failure. The failure mileage was 10,000.