2022 Jeep Grand Cherokee: adaptive cruise control problems

Filed May 16, 2026 · Electrical, Engine · PA

I am submitting this complaint regarding a serious safety-related failure involving my 2022 Jeep Grand Cherokee 4xe. I purchased the vehicle used with approximately 15,000 miles and was informed the previous owners leased it and rarely used it. At approximately 40,000 miles, despite completing all recalls in a timely manner, the vehicle experienced the exact type of hybrid system failure a recall was intended to prevent. The issue began when the hybrid system failed and left the vehicle unsafe to operate. Upon startup, only accessory power activated and the engine would not start. A full power cycle was required before the vehicle started. Immediately afterward, warnings appeared including "Service Hybrid System," "Service Charging System," "EAB Unavailable," "Lane Keep Assist Unavailable," "Pedestrian Braking Unavailable," and "Adaptive Cruise Control Unavailable." The check engine light illuminated and all hybrid modes became unavailable. Shifting became erratic and harsh. Downshifts from 2nd to 1st felt like sudden braking and caused me to hit my head on the steering wheel. During acceleration, the transmission slipped and shifted unpredictably. Fuel economy dropped from approximately 22 MPG in E-Save mode to approximately 10 MPG at highway speeds. Diagnostic code P1E1D was retrieved and I was advised the vehicle was unsafe to drive. While driving to the dealership, the vehicle shut down twice while in motion. During both shutdowns, power steering and braking assistance were lost, posing an extreme risk to myself and others while moving the vehicle off a busy three-lane roadway. Dealership diagnostics determined one or both high-voltage battery systems failed and required replacement. Despite completed recalls, the issue still occurred. Parts were backordered over a month. I believe this failure and recall effectiveness warrant investigation due to the serious safety risks created by loss of propulsion, steering, and braking assistance while driving.

Filed Oct 13, 2025 · Brakes, Driver assistance · OH

While driving on a local neighborhood street at approximately 38 miles per hour, ( cruise control possibly engaged) , all the lights on my dashboard suddenly illuminated. A messages appeared stating that service was required for every guidance and braking system. At that moment I became concerned, so I attempted to use the brake. Despite pressing the brake pedal as hard as I could, the car did not slow down. I cannot remember if I downshifted using the paddle shifters on the steering wheel, but I was able to coast to a manageable speed and pull into a parking lot. I then turned the vehicle off and on again, but all the warning lights remained on the dashboard. After waiting for about five minutes, the vehicle was restarted, and this time none of the warning lights were on. Since I was very close to home, I drove the rest of the way very slowly. Later, I searched online and discovered that other people have experienced this same problem. Some of the information I read suggested that water can get into a component, and it had been raining on the day of the incident and the day before. My primary safety concern is what would have happened if I had been approaching a stoplight or driving on a freeway where I needed to stop suddenly. I am confident that I would not have been able to stop in time to avoid a crash. It is frightening to think of what could happen if a child were to run into the street and this happening. I immediately made an appointment with my local Jeep dealership. The dealer has since driven the vehicle 98 miles but has not yet been able to replicate the issue.

Filed Feb 18, 2025 · Brakes, Driver assistance · NY

The Adaptive Cruise Control and Automatic Emergency Braking have not worked properly for over a year. Sometimes I get a message that the AEB/ACC is not working and to see the Dealer other times i have a light lit showing it is not working. On some occasions there are no signs of it not working but ate ACC works like the regular cruise control and does not slow the car down unless you apply the brake. The car has been to the dealer 2 pervious times with no long term fix it is now there again out of warrantee waiting to be fixed. last time was 05/06/24

Filed Nov 30, 2024 · Driver assistance, Electrical · MN

My Jeep, when using adaptive cruise control, will occasionally apply emergency breaking when a vehicle passes alongside me in an adjacent lane in the same direction of travel. I’ve had other cars directly behind me when this happens and it appears to other drivers like I’m “break checking” them. Usually it’s triggered when the passing adjacent vehicle is a tractor trailer or a truck pulling a trailer. Furthermore, the actual early warning forward crash detection does not work at all. I have no warning lights alerting me of a malfunction.

Filed Feb 12, 2024 · Driver assistance · IL

While driving on the highway with the adaptive cruise control set to 77mph, the forward collision alert went off and tapped the brakes while passing a vehicle towing a trailer in the lane to the right. looking back at video on my dash cam, there was nothing in the road that should have set off the warning and the other vehicle was within their lane the entire time. I have had several false warnings in the past but this was the first time it applied the brakes.

Filed Feb 7, 2024 · Body · TX

While driving going about 40mph, I pressed cruise control to 75. Once my car picked up speed, no other cars around, no overpass, etc. my moon roof exploded out of no where. My 8 month old was in the backseat right under where it busted.

Filed Jul 18, 2023 · Driver assistance · FL

The Forward Collision Warning light comes on display cluster during start indicating it is turned off. Adaptive Cruise Control does not appear to be working because it doesn't give warning upon closing in on the vehicle in front of my vehicle and I have had to react by tapping brake to turn the cruise off. Parking Collision Warning works intermittently. These problems showed up after a software update done at dealership. When I took it in recently was told they could not find any problems.