2021 Jeep Grand Cherokee: start-stop system problems

Filed Sep 30, 2026 · Airbags, Seat belts · CA

The driver’s seatbelt sensor constantly goes off as not detecting that the seatbelt is buckled, while driving; this causes the alarm to continuously beep and also disables the airbag. Aside from the seatbelt issue, there is a standalone airbag issue that has been detected by the car’s health report multiple times. The drive shaft is also defective, causing the car to shake when the car hits 73 mph. The auto stop/start also disables on its own. I have taken it to the dealership to get all of this fixed but all issues have persisted. There are active recalls on these issues for other 2021 Jeep Grand Cherokees but they are not attached to my vehicle even though my vehicle has the same recall issues.

Filed Jun 14, 2026 · Electrical · OK

I had stopped at a red light and the auto start/stop turned off the car. It would not restart. The fault caused it to stay in Park and could not get out of Park to move vehicle. This not only caused a road hazard but made me and others unsafe. The cause was a enclosed fuse box that made batteries go bad. I feel Jeep should be responsible for this.

Filed Sep 10, 2025 · Electrical, Fuel system · MI

Electric start is cranking but engine takes up to 10 seconds or longer to turn over. This happens from cold start and even the stop start when in drive at a stop sign or stop light. It is either an issue with fuel injection/fuel pump or something else as it is not a battery issue just replaced them to be sure or a starter issue.

Filed Jul 13, 2025 · Electrical · WA

The auto stop-start feature not functioning, with a message "Stop/Start Unavailable Service Stop Start System Now

Filed Sep 27, 2024 · Engine · OH

The auto stop/start system,shuts down the engine when waiting to pull out onto a busy street.it has a shut down switch,but it gets rest everything the ignition is turned on.there is no way to perfectly shut off.

Filed Jun 21, 2024 · Brakes, Electrical · VA

Vehicle shuts down puts itself in park and applies the parking brake and states that the hood is not closed when it is and has not been opened. It also disable the auto stop/start . It does this at traffic lights or when ever a vehicle comes to a stop creating a potential rear end collision due to having to manually restart the vehicle, disengage the parking brake and put the vehicle in drive.

Filed Sep 25, 2023 · Brakes, Driver assistance · CA

On many occasions, warning lights come on for no reason. The dealer has "updated" software, but to no avail.. Collision warning, stop/start error, throttle body error and more. On the last event we were driving uphill, approx 25 mph, nobody in front of us, and the brakes slammed on with multiple errors showing.. the car then lurched forward with active breaking, stop start error, throttle body sensor all showing up and going away. This happened 4 times on the evening of Sep 15th. The errors and random and intermittent.. They replaced a "secondary" battery at one point, and that did nothing. They told us we needed to drive it for over 100 miles, to charge the battery, but it did not fix the stop/start or any other error. Now it is in the Cerritos dodge dealer and we have a formal complaint filed with Chrystler.. The dealer states they can't find any problems.. During most of the events, the errors and warning lights do not stay on longer than a few seconds. I have one picture I was able to take when the warning lights stayed on a little longer.

Filed Jul 11, 2023 · Electrical, Steering · NY

On May 4, 2023, immediately upon starting the car, warning lights were illuminated: Blind Spot Alert Unavailable - Service Required; Stop/Start Unavailable Service Stop/Start System; Service Electronic Stability Control; Oil Change Required; Service Power Steering; Check Engine Light. Vehicle had no power steering. It was taken to the dealership several hours later, and at that time no warning lights came on and the car had power steering. Dealership indicated that there was nothing wrong with the vehicle. On July 1, while driving 75 mph on I-95 in New Hampshire, while on a road trip from NY to Maine, multiple warning lights illuminated and vehicle immediately lost power steering. I was barely able to get it to the shoulder. Not one Jeep dealership in the area was available to see the car. A local mechanic was able to hook it up and determined that the car lost connectivity. He agreed to keep the car while we continued on our trip with a rental car we found and contacted our Jeep dealer. Two days later, while waiting for our Jeep dealership to tow it home, we learned that the vehicle was completely dead and won't even accept a charge to the battery. Chrysler Customer Service was called and a case was opened on July 3rd. Upon calling back on July 5th, I learned that they "closed" the case. No one could explain to me why and I asked for it to be reopened. Called back on July 11th and spoke with a different representative who indicated the case was "closed" and there was no indication of my call from July 5th. Reiterated and clarified all information and now await a call from a Specialist. The car is still not in NY and is still at the mechanic in NH waiting to be picked up by Jeep to be inspected and fixed. My safety and that of my family, and those in the cars around me, were put at risk as a result of this incident as I lost the ability to steer the vehicle while traveling at 75 mph.

Filed Feb 11, 2022 · Brakes · VT

At a red light the auto start/stops shuts engine off and the emergency brake engages. It’s done this multiple times.

Filed Jan 10, 2022 · Brakes, Driver assistance · NM

I took my vehicle in for a recall on Saturday. I left with the auto start stop warning light on. They said the cable was fried and part was on back order, otherwise it was fully drivable. I started it for this first time since Saturday on Monday morning. I began to drive and the AEB immediately slammed on. Every warning light started to flash. Including the hazards. I had to unload my kids through the driver side, as the other doors wouldn’t open from inside or outside. The locks nor the windows would roll down. On the suspension it said to turn the engine on, however the engine was on.