Jeep Grand Cherokee L adaptive cruise problems

Filed Sep 30, 2026 · Driver assistance, Electrical · PA

OnXXX at approximately 915 am I was making a LEFT hand turn across 3 lanes of 422, when the vehicle appeared to have a serious electrical failure and complete shut down as nothing on the vehicle was working and I was unable to immediately exit the vehicle. I was about 3 ft out into the intersection facing oncoming traffic going the opposite direction. The vehicle was towed to Preston Dodge/Jeep in New Castle PA. On Sept 16th I received a text message stating the problem had been fixed, the problem being "the positive terminal not being fully seated thus creating a powering down situation." I picked the vehicle up, and another significant electrical incident occurred at 3am on XXX while driving home from work. I lost all dashboard illumination except for my main center screen, and received flashing warnings about blind spot failure, as well as electrical seat failure, failure of hatch operation, failure of windows and door lock/unlock, cruise control unavailable, active lane management unavailable, AEB unavailable, ACC unavailable, rear wiper not operating, mileage flashing. The dealership was then contacted again, the Jeep remains in their possession, however I they have failed to be transparent and severe lack of communication. The vehicle had a yearly state inspection by the same dealership 2 weeks prior to the initial incident.

Filed Sep 21, 2026 · Acceleration, Engine · MO

The occurrence happened 4 times. While driving when the accelerator is pushed, and not in an extreme way, the engine will rev to the maximum level, the transmission stopped working the car comes to a slow stop and the ignition must be switched off to stop the run away engine. Then restarted without incident. This has happened while making both left and right turns with and without cruise control on. Example: while driving on a 2 lane road with cruse control on the car in front slows to turn I apply the brakes, when applying minimal pressure to the accelerator pedal the engine revs to redline, the transmission stopes functioning and the vehicle coasts to a stop while in traffic with no forward movement possible. The engine revs without any input from the operator. Very dangerous have almost been rear ended 4 times by the traffic behind me. I feel this is a serious problem that may cause a serious life threatening accident. I will be requesting repair or replacement from the dealership under warranty and will report any findings to this organization. This needs to be addressed immediately as this is a serious life threatening issue.

Filed Sep 5, 2026 · Brakes, Driver assistance · NE

2023 Jeep Grand Cherokee Summit unexpectedly applied the brakes while traveling approximately 78 mph with Adaptive Cruise Control engaged. There was no vehicle, object, or obstruction directly ahead. The forward collision/ACC warning activated immediately before the vehicle braked. At approximately the same time, the driver had touched the power lumbar button to disengage the lumbar. The lumbar had independently activated approximately 15–20 minutes earlier. Not sure if the 2 are related or if the is just coincidental?

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 May 14, 2026 · Driver assistance · TX

When a car in front of me is slowing down while the adaptive crusie control is on and I have the distance set to 3 or 4 lengths, the farthest one available, and the adaptive cruise control is set, the car will start slwoing down like the cars ahead of me and if I switch lanes to go around of the car that is slowing down and there is another car in front of me of the lane I move into that adaptive crusie control acts as if there is no car in front of me in the lane and will begin to accelerate until I engage the brake. So for example I'm traveling in the far right lane of a four lane road, two going north and two going south. I have my adaptive crusie control on and set to 50 MPH and the distance set to 4 car lengths (max) and then the car in front of me starts to slw down. The adaptive crusie control will adjust and start to slow down as well. So I decide to get into the next lane over to my left, where there also happens to be another car 1 or 2 car lengths in front of me, the adaptive crusie control will not detect that car after lane change and will begin to accelerate back up to 50 MPH when it should still be slowing down to avoid a collision. This has happened multiple times.

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.

Filed Dec 30, 2025 · Brakes, Driver assistance · AR

I had my brakes flushed by my local dealer in June 2025 at about 31,000 miles for routine maintenance. I was traveling to York, Pa from Gravette, AR in September of 2025. All systems on my Cherokee had worked flawlessly on the trip, as they had since its purchase new in the Fall of 2023. On a very curvy, hilly road in the Cactocin mountain area, I was braking often. The ABS system warning light came on, as well as messages that the automatic collision control, lane departure control and adaptive cruise control were disabled. I noticed immediately that my brake pedal felt mushy and went nearly to the floor. Basically it felt like an old car with no power brakes. I proceeded to Gettysburg. When I restarted the car the error messages had cleared. I continued but after a few stops all of the error messages returned. When I got to York, still Thursday, I went to Stetler Jeep dealership and asked to have my Jeep looked at. The service clerk said no because I had no appointment. I asked to at least do an Obd2 scan so I know what the problem is. He said no, it can’t be done without an appointment. was told not until next Wednesday. I only planned to be in York until that Sunday. Between York and Decatur, IN on way home to Arkansas the warnings reoccured 3 more times, a total of 5. When stopped with my foot on the brake, when no errors showing, I would sometimes hear a clicking noise behind the steering wheel and feel it on my foot. A dealer in Indiana and my local dealer in Fayetteville, Arkansas could not find anything wrong. Those error messages have not appeared again without any repair. In December, my brakes were dragging and the brake waning light came on several times, then remained on. I could release the brakes by pumping them. My local dealer flushed brake system as the repair and warning light was gone. Two days later, brake system warning light is on again. I am taking it back to the dealer again even though brakes seem to be working fine.

Filed Aug 28, 2025 · Acceleration, Driver assistance · MO

My 2024 Jeep Grand Cherokee was having failures with the Active Lane Management and Park Sense features not turning on. A visit to the service department revealed failures with both the front and rear facing cameras. While waiting for parts, I was travelling on the highway with the Adaptive Cruise Control enabled. (Not thinking about a possible bad interaction with the ACC.) In slowed traffic, my Jeep decelerated approaching a car, then suddenly accelerated. I had to quickly press the brake before crashing into the car in front of me. The Adaptive Cruise Contol should have disabled with the other systems have trouble with the cameras. The failure mode should have been to brake or shutdown, not to accelerate.

Filed May 14, 2025 · Driver assistance · OH

Forward collision feature does not work. Does not detect possible collision and does not apply emergency braking. Dealerships told me I don’t have the forward collision warning plus unless I am using adaptive cruise control, which is false. These are two separate features.

Filed Feb 24, 2025 · Fuel system, Lights · OK

With approximately 8,000 miles on vehicle, it began to buck and decrease speed once hitting the set cruise control speed. Later in the road trip, with 30 miles left until empty the vehicle shut off on the highway. Vehicle would not start and headlights would not illuminate. Roadside assistance provided gas can. Put approximately 5 gallons of gas in vehicle and range increased to 31 miles to empty. Vehicle then started and was able to be driven home.