2017 Jeep Grand Cherokee driver assist problems

FORWARD COLLISION AVOIDANCE: AUTOMATIC EMERGENCY BRAKING

My 2017 Jeep Cherokee rolled away three times in one day while in Park with the Electric Parking Brake engaged. My driveway has no flat area and slopes toward a public road, creating a serious hazard for my family and traffic. The rollaways occurred suddenly with no warning lights. I had to park the Jeep sideways in a snowbank for two weeks to prevent further rollaways, creating added risks for my family in winter conditions. The vehicle remains at the dealership. During the first two days of the evaluation, the dealer confirmed brake shoe thickness (4mm), verified the EPB software was current, and found no diagnostic codes. They could not recreate the rollaway or identify a cause. No mechanical or electronic faults were found. FCA communication has been inconsistent. I experienced dropped calls, long holds, contradictory statements, and repeated refusals to provide written documentation of the inspection authorization. FCA said they could not escalate the safety case unless the vehicle was already at the dealership, yet still refused written confirmation of the purpose of the inspection, and I was not willing to bring the vehicle in without documentation. After the evaluation, when I attempted to relay the required findings per the RO instructions, FCA informed me the safety case had already been closed, leaving no record of the defect. FCA said only the rental authorization remained open and they could no longer escalate my case. I then had to re-explain the entire rollaway incident. FCA and the dealer now disagree on whether the RO is open or closed, and FCA has not explained who is responsible for the ongoing loaner or what the next steps are. The defect remains unresolved and the Jeep is unsafe to operate or park at my home.

NHTSA complaint #11706955 — an unverified report by a vehicle owner.

BACK OVER PREVENTION: WARNINGS

Transmission failed. Stuck in drive while on busy road, could not put vehicle in park or neutral and could not turn vehicle off. Drove very slowly to dealership because no one would tow without being able to turn it off and stuck in drive. Dealership did diagnostic and decided transmission needed replaced. Safety of other drivers were put at risk because car could not be taken out of drive and could not be shut off. No warning lamps, no messages prior to failure. Message came on to place vehicle in park to reset after trouble started but nothing worked at that time. Would not go into neutral or park. The emergency brake had to be used to keep car from moving forward. I recently had transmission replaced (1/24/2025) and now have a check engine light on with a code reads P1DCA Park Sensor Circuit Open

NHTSA complaint #11638957 — an unverified report by a vehicle owner.

BACK OVER PREVENTION: WARNINGS

The component is known to fail on jeep forums weather it fails completely or was not installed properly and may loose its functionality. The event is when towing a trailer and reversing the car will see the trailer as an obstruction and will engage the brakes. The car is alleged to have an automatic system that when towing is supposed to turn the parking assist sensors off to prevent the event occuring. If that system isn't present there is a button that should allow you to turn the parking system off which it does for about two seconds and start backing up the trailer, then it will automatically turn back on and see the trailer and lock the brakes up which is jarring and startling to say the least. I am fairly certain this could cause an accident if it hasn't already.

NHTSA complaint #11585567 — an unverified report by a vehicle owner.

BACK OVER PREVENTION: WARNINGS

Bought my Jeep used in Sept 2023. For the first time hooked it up to my small trailer to pick something up. Pulled around and went to reverse and the rear park assist braking jammed on. At first I wasn't concerned. I knew there was a way to turn them off based on my jeep manual. Unfortunately, the park assist would not turn off. Neither the park assist button on dash nor the settings in the computer screen would turn them off. The light on the dash button would turn on for 2 seconds but then turn right back off. In the computer settings , I would click the rear park assist to uncheck it. It would uncheck for a few seconds then check mark would come right back again. I tried to turn off the front park assist in the computer just to see what would happen. I can't turn those off either. This is extremely dangerous. I was very lucky I discovered this before I left my property. What if I was in a busy place, road, parking lot, etc. So I do have an appt with my dealer tomorrow, who claims to have never heard of this issue before. . But after doing simple google searches on the internet, I found numerous instances of many Mopar vehicles, like my Jeep GC, Dodge Durango, Chrysler Pacifica, etc. who have had the same exact issue when they try to tow something and cannot turn off the Park Assist feature to back up with a trailer attached. I also called the FCA US Customer Service line to tell them about this and they said they had never heard of this problem. Yet in the many forums I found where people have posted about this issue, they have had to get software update done on the Park assist module to fix this issue. So it is known, but FCA is not admitting to it being an issue. This should be a recall, or if nothing else, considered a necessary upgrade. Also found you have a report in your system already on this issue and I found a Jeep service bulletin related to this issue as well. I will see what the dealer says tomorrow.

NHTSA complaint #11583654 — an unverified report by a vehicle owner.

FORWARD COLLISION AVOIDANCE: WARNINGS

Jeep serviced for small evap leak. The next day after getting my jeep back from dealer, when I started my grand Cherokee trailhawk, it felt like I had gotten kicked in the rear end. The SERV 4WD light comes on, FCW, stability control, RCW error lights come on. ACC not available. Took jeep to dealer and had PCM cleared as code was coming up as inactive. Was told to drive it as usual and if error lights came back on to get it to dealer asap to get codes. After dealer checked for error codes, codes for transfer case problem popped up. The dealer stated they can’t tell what’s wrong until they diagnosis it. Appointment scheduled for diagnosis at end of July as mechanic is on vacation. Asked if jeep was drivable to which I got mixed answers and told to be careful that jeep may slip into 4WD and not drive right. Dealer stated Jeep is aware of problem but no recall at this point and stated they just wished Jeep would recall and fix the problem . The dealer stated they have encountered this issue in jeeps more than any other vehicle.

NHTSA complaint #11531106 — an unverified report by a vehicle owner.

FORWARD COLLISION AVOIDANCE: ADAPTIVE CRUISE CONTROL

The contact owns a 2017 Jeep Grand Cherokee. The contact stated that while driving approximately 55 MPH with the adaptive cruise control activated, the vehicle nearly crashed into the rear of a second vehicle. The contact stated that the adaptive cruise control did not operate as needed to decelerate or stop the vehicle. The cause of the failure was not yet determined. The manufacturer and local dealer were notified and indicated that a software update of the adaptive cruise control was needed. The vehicle was not yet repaired. The failure mileage was 93,000. The contact stated it was an operator error as he depressed the CC button as opposed to the ACC button and wishes to rescind the complaint.

NHTSA complaint #11521408 — an unverified report by a vehicle owner.

FORWARD COLLISION AVOIDANCE: AUTOMATIC EMERGENCY BRAKING

The rear parking assist break does not turn off, yes it is available for inspection. I had an emergency, I could not reverse out of my parking spot because the emergency break would automatically stop my vehicle, it was sensing there was something behind it. The problem has been confirmed by dealer stated it is an internal failure with the factory radio. It has not been inspected by the manufacturer, they say, it's out of warranty so they are not responsible even though this was a defect since the beginning. I mentioned it to the dealer when I took my car for service, when I first purchased it, they said all I had to do was turn off the park assist button, that did not work. This is very concerning, its a safety hazard if I can not go on reverse due to the break automatically stopping my vehicle and impeding me from going on reverse. Jeep and Mopar are ware of this issue. I am not the only person that has complained about this safety hazard/concern. There are countless individuals that have complained about the same issue.

NHTSA complaint #11518862 — an unverified report by a vehicle owner.

BACK OVER PREVENTION: WARNINGS

The rear parking assist break does not turn off, yes it is available for inspection. I had an emergency, I could not reverse out of my parking spot because the emergency break would automatically stop my vehicle, it was sensing there was something behind it. The problem has been confirmed by dealer stated it is an internal failure with the factory radio. It has not been inspected by the manufacturer, they say, it's out of warranty so they are not responsible even though this was a defect since the beginning. I mentioned it to the dealer when I took my car for service, when I first purchased it, they said all I had to do was turn off the park assist button, that did not work. This is very concerning, its a safety hazard if I can not go on reverse due to the break automatically stopping my vehicle and impeding me from going on reverse. Jeep and Mopar are ware of this issue. I am not the only person that has complained about this safety hazard/concern. There are countless individuals that have complained about the same issue.

NHTSA complaint #11518862 — an unverified report by a vehicle owner.

FORWARD COLLISION AVOIDANCE: AUTOMATIC EMERGENCY BRAKING

I was driving back home and was travelling at around 30miles/hr on a street. All of a sudden my car dashboard started flashing and all the indicators in the dashboard started to flash.. The vehicle started to accelerate and brake at the same time... The engine made a strange weird sound. I had to put the emergency parking lights and pull over slowly. Luckily I was closer to home, so drove back home with the hazard lights on.. The car moved very slowly with the engine accelerating and braking at the same time. Next day, I had the car towed to the dealership and they also saw the same issue. They indicated the Throttle Control Module was behaving erratically and have to re-flash it.

NHTSA complaint #11502834 — an unverified report by a vehicle owner.

FORWARD COLLISION AVOIDANCE: ADAPTIVE CRUISE CONTROL

Problem in transfer case, can’t use 4WD, ACC and FCW are not working. My car has only 41000 miles and I am reading about many, many others having the same problem. Jeep should recall this problem!! Thank you

NHTSA complaint #11478587 — an unverified report by a vehicle owner.