Jeep Grand Cherokee L collision warning problems

Filed Oct 8, 2026 · Driver assistance, Transmission · MD

On or about 10/7/26, my vehicle suffered a simultaneous, unprompted failure of multiple safety and control systems. I believe this is due to a background manufacturer-initiated Over-the-Air (OTA) software update and is a well known issue on the Jeep Grand Cherrokee L . The exact date the update was pushed is unknown, as it occurred automatically via the telematics system. The symptoms appeared suddenly: the Forward Collision Warning and Pedestrian Emergency Braking (PEB) systems completely deactivated, leaving the 'FCW OFF' warning light permanently illuminated on the dashboard. Concurrently, the steering wheel paddle shifters ceased to function ('Paddle Shifting Disabled'), and the vehicle's digital display automatically reset its units of measurement. This constitutes a severe safety hazard. The vehicle’s automated crash mitigation features are completely disabled, depriving the driver of critical safety protections designed to prevent front-end collisions. Furthermore, the loss of transmission control via the paddle shifters restricts the driver's ability to manually downshift and use engine braking, which is essential for safely managing vehicle speed on steep declines or slippery road conditions.

Filed Sep 10, 2026 · Driver assistance · CA

My wife was driving our 2026 Jeep Grand Cherokee Limited with our child as a passenger on a public roadway. Traffic ahead slowed because another vehicle was turning into a parking area. There was no collision. The Forward Collision Warning/Automatic Emergency Braking system activated unexpectedly and applied the brakes. Immediately afterward, the vehicle appeared to stall or shut off while still in traffic. The instrument cluster displayed a message instructing the driver to press the Stop/Start button to restart the vehicle. The vehicle did not restart immediately and required approximately 10 seconds before it could be restarted. During this event the vehicle lost propulsion in traffic, creating a safety concern. The vehicle had approximately 3,258 miles at the time of the incident. The vehicle is currently at a Jeep dealership for diagnosis. No injuries or crash occurred.

Filed Aug 5, 2026 · Driver assistance, Electrical · IA

Forward Collision Warning has been disabled since a forced OTA software update in August of 2024. Jeep has issued a STAR report to their dealers (S248A000013). Jeep acknowledges it is an issue, but fails to cover the remedy. Dealer wants $200+ to diagnose plus the cost of the software refresh. The system forces you to take the software update, removes a key safety feature, and then Jeep wants you to pay to restore it. This is a major issue with this model covered in the forums and should be addressed via recall. [XXX] [XXX] INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Filed Aug 1, 2026 · Driver assistance, Engine · VA

Two issues- 1. When pulling out into traffic the engine/gas did not catch and we slowly creeped out across lanes before the gas took. This almost caused us to become t-boned by a passing car. When the gas took the car lurched forward fast which could have been another accident. 2. When driving with adaptive cruise control the forward collision warning fault light and service adaptive cruise control light kept turning on and off with a service needed message on the heads up display. This flashed on and off repeatedly causing driver distraction and also limiting vehicle safety. This vehicle has been taken to the dealership multiple times since purchase with various resets done (Transmission control module, powertrain control module) and still numerous panel error lights turn on (engine malfunction light, traffic signal recognition fault light) and issues occur (ac stops blowing cold air, inside screens freeze) but can never be replicated or fault code founds. The biggest safety issue is the lagging engine/gas that randomly occurs from a stop as you can’t predict when it’s going to happen and it will cause an accident at some point.

Filed Jul 31, 2026 · Driver assistance, Electrical · OH

The initial safety issue began with the rear-view camera going blank and the Uconnect 5 screen freezing while the vehicle was operating in reverse. My vehicle's service record indicates that Safety Recall 24V‑436 / FCA Campaign 79B was marked as "Completed" in the FCA system on June 19, 2024—even though the official recall was not initiated until around June 25, 2024, and no physical software update was performed at that time. To resolve the recall, I took my 2022 Jeep Grand Cherokee L to Performance Chrysler Dodge Jeep Ram in Delaware, Ohio, where technicians updated the software to version FCA-MY24.U33.43-PROD. Immediately following this dealer update, several core vehicle and safety functions failed: Forward Collision Warning (FCW): The FCW system automatically turned off, and the option to re-enable it completely disappeared from the vehicle settings menu. Vehicle Safety & Operational Controls: Automatic speed-sensitive door locking and paddle shifter functionality were completely disabled. I returned the vehicle to the dealer, where technicians reflashed the software to restore the user configuration options and re-enable FCW. However, the Uconnect system remains dangerously buggy: Active Safety Alerts: The amber FCW OFF light illuminates continuously and gets stuck on. While ADAS features appear partially operational, the constant amber warning obscures real-time system failure notifications. Backup Camera & System Latency: The Uconnect system routinely freezes, introducing a dangerous delay in the rear-view camera feed during reversing maneuvers. System Instability: The Uconnect software randomly resets to the Italian language, resets rear-camera display settings, disables automatic door locking, disables paddle shifters, and causes seat auto-adjustment malfunctions. Stellantis has since issued TSB 08-221-26 (Software Version U41.10), which explicitly acknowledges that these exact software bugs—including the persistent FCW OFF light, screen freezes,

Filed Jul 6, 2026 · Driver assistance, Electrical · MD

Randomly, and without warning, the instruments, gauges, and displays will switch into a language I do not speak or understand (Italian). Coinciding with the switch to Italian language, cluster and radio display settings revert back to default settings, auto door locks and paddle shifter becomes inoperative (with no menu to enable), pedestrian emergency brake (peb) lamp or forward collision warning (fcw) lamp turns on with no way to disable, units of measurement including speed, temperature, etc. all change, and many other random settings change as well. ***This is clearly a dangerous situation because of all the functions and gauges that change, and the fact it is difficult if not impossible to recover from this due to the language of the setting menus, and the complexity of discovering and navigating through all these changes. I have taken it to the dealer twice, and they say there is nothing they can do and to wait for a possible software update, but none has come and it has been over a year. When this happens, even if one is able to wade through all the settings menus and change setting back, some items cannot be reset (like the FCA off lamp). According to various Jeep owner forums, some dealers have been able to reset something and temporarily correct the issue, but they charge for this service, and the issue returns randomly again. Here is an example forum discussion, indicating many if not all vehicles are affected: [XXX] Many people on the forum believe this issue did not start until a software update a year or so ago. This is a well known and widespread problem, and there is even a DOT Bulletin on the issue: dot.report Bulletins Because this is dangerous (for settings/gauges/units to no longer be useful while driving), and it occurs randomly, I strongly believe this issue should be a manufacturer recall. I am available for any needs. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Filed May 25, 2026 · Driver assistance, Electrical · SC

My 2022 Jeep Grand Cherokee L experienced a sudden, simultaneous failure of multiple electrical, safety, and driver-assistance systems. Without warning, the instrument cluster illuminated a yellow warning light indicating that the Forward Collision Warning (FCW) system was disabled and unavailable. Concurrently, the steering wheel paddle shifters completely stopped functioning, and the vehicle randomly reset its primary language setting to Italian reverted its system units to Metric and Celsius. Furthermore, critical user customization options in the Uconnect 5 infotainment system—specifically the auto-folding side mirrors option, automatic door locking preferences, and passenger seat controls—completely disappeared from the settings menus.

Filed Apr 28, 2026 · Driver assistance · PA

There is a continual problem with this car. Randomly, about every 1-2 weeks, my entire infotainment center, customer settings, and seat preferences will reset to Italian and the metric system. When this happens, the front collision warning system turns off. The radio screen also begins to flash on and off, where I cannot use the backup camera and audio cuts out. I have had it to my local Jeep dealership about 6 times now, and they are able to reset the system but the problem comes back. I had it there earlier in the week and the technician told me that there is no permanent fix, and that I will be coming back routinely because I am not the only one with this issue.

Filed Apr 20, 2026 · Driver assistance, Electrical · NY

Randomly, and without warning, the instruments, gauges, and displays will switch into a language I do not speak or understand (Italian). Coinciding with the switch to Italian language, cluster and radio display settings revert back to default settings, auto door locks and paddle shifter becomes inoperative (with no menu to enable), pedestrian emergency brake (peb) lamp or forward collision warning (fcw) lamp turns on with no way to disable, units of measurement including speed, temperature, etc. all change, and many other random settings change as well. ***This is clearly a dangerous situation because of all the functions and gauges that change, and the fact it is difficult if not impossible to recover from this due to the language of the setting menus, and the complexity of discovering and navigating through all these changes. I have taken it to the dealer twice, and they say there is nothing they can do and to wait for a possible software update, but none has come and it has been over a year. When this happens, even if one is able to wade through all the settings menus and change setting back, some items cannot be reset (like the FCA off lamp). According to various Jeep owner forums, some dealers have been able to reset something and temporarily correct the issue, but they charge for this service, and the issue returns randomly again. Here is an example forum discussion, indicating many if not all vehicles are affected: [XXX] Many people on the forum believe this issue did not start until a software update a year or so ago. This is a well known and widespread problem, and there is even a DOT Bulletin on the issue: dot.report Bulletins Because this is dangerous (for settings/gauges/units to no longer be useful while driving), and it occurs randomly, I strongly believe this issue should be a manufacturer recall. I am available for any needs. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Filed Apr 14, 2026 · Airbags, Brakes · 73,945 miles · MN

The contact owns a 2022 Jeep Grand Cherokee L. While driving approximately 40 MPH, the air bag, ABS, parking brake, check engine, seat belt, and collision warning lights illuminated. Additionally, the messages "START/STOP not ready," "ACC Disabled", "Cruise Control”, “Service Air Bags System", "Blind Spot Alert Off", and "Service ESC" were displayed. The vehicle was taken to an auto parts store, where a handheld diagnostic machine retrieved DTC: U0140. The vehicle was not diagnosed or repaired. The manufacturer was not notified of the failure. The failure mileage was approximately 73,945.