2020 Jeep Grand Cherokee: adaptive cruise control problems

Filed Sep 20, 2026 · Brakes, Driver assistance · MI

ABS module completely malfunctioned from a shortage. Threw up 7 different codes, even threw up my check engine light for a bit. Can’t even use cruise control because my “memory system” and “park sense” are unavailable. Sometimes it makes the wheel super stiff and the acceleration and break pedals super sticky. I see many recalls for 2020 Jeep Grand Cherokee’s, and believe mine should be included. I should’ve have to pay $3,000 out of pocket for something a ton of people are reporting as an issue. I found one reported a few months back with the same issue.

Filed Jun 11, 2025 · Acceleration, Brakes · MS

I was driving on the freeway and the car stuttered and then stopped, had to get towed home found out the aux battery was bad, replaced that and brake hub and sensor on driver tire but abs. And anti swerve light. Also no cruise control. Screen says Fcw unavailable service required, also 4wf service.

Filed Sep 6, 2024 · Driver assistance, Electrical · CA

I am reporting significant safety issues with my 2020 Jeep Grand Cherokee Limited X. The vehicle has repeatedly experienced failures in critical safety systems such as Adaptive Cruise Control (ACC), ParkSense, and Lane Departure, which randomly disable while driving, particularly in cold weather or after a restart. These failures compromise essential safety functions necessary for highway driving and parking. Additionally, I encountered a severe issue regarding the vehicle’s lack of over-voltage protection. While charging the battery, it was accidentally exposed to 48 volts instead of 12 volts, resulting in damage to key electronic modules, including those controlling safety systems. This lack of protection from foreseeable charging errors is concerning, especially given the advanced electronics in modern vehicles. Other Jeep owners have reported similar issues related to voltage fluctuations affecting ACC, Lane Departure, and ParkSense systems. Battery-related issues seem to be directly linked to the failure of these critical safety features​(Jeep Cherokee Club)​(Jeep Forum). Voltage instability, particularly with the Engine Stop/Start (ESS) system, has also been widely discussed, further pointing to potential flaws in Jeep’s electrical design. Given the critical nature of these systems, their failures due to inadequate over-voltage protection and inconsistent electrical performance represent a serious safety risk. I request that the federal safety agency investigate these concerns, as they may be affecting a broader range of Jeep vehicles, putting drivers and passengers at risk. While a fire did not occur, the potential is there due to the burning of electronics with strong odors and smoke.

Filed May 26, 2023 · Electrical, Engine · IL

The check engine light started appearing on the dash and the adaptive cruise control kept appearing that it was off. The light would go off and come on again and the transmission would not shift gears and I could not go in reverse. I drove vehicle to Marino Jeep and they notified me of 3 defects in the internal transmission- which I still have my warranty as the car is at 32.800 miles ONLY on the odometer. This was a dangerous defect causing my car to stall.

Filed Dec 14, 2020 · Acceleration, Brakes · 1,800 miles · IL

Purchased new in september. Currently has 2100 miles. Cruise control "sticks" and fails to disengage at the controls. When the accelerate control is depressed and released, the vehicle will continue to accelerate without capping the increase in acceleration until the system is disengaged with the brake pedal. Very dangerous! This scenario occurs both at lower and higher speeds over 55.

Filed Mar 30, 2020 · Acceleration · 1,100 miles · MN

Tl* the contact owns a 2020 jeep grand cherokee. The contact stated that while driving at various speeds with the cruise control activated, the vehicle rapidly accelerated after tapping the plus sign button on the steering wheel without warning. The contact depressed the brake pedal to deactivate the cruise control. Dan welle chevrolet buick, chrysler dodge jeep ram located at (1505 main st s, sauk centre, mn 56378) and juettner motors located at (1900 broadway st, alexandria, mn 56308) were contacted and the contact was informed that the cruise control feature operated as intended. The manufacturer was also notified about the failure and referred the contact to the local dealer for assistance. The vehicle was not repaired. The failure mileage was 1,100.