Jeep Grand Cherokee L check engine light comes on

Filed Nov 8, 2026 · Engine, Fuel system · PA

While attempting to execute a left-hand turn across oncoming traffic, the vehicle suffered a severe and sudden throttle hesitation and loss of acceleration power. Despite applying pressure to the gas pedal, the vehicle failed to accelerate quickly enough to safely clear the intersection, creating an immediate, life-threatening safety hazard with oncoming traffic. There was about a 6-second delay and this kept happening. Following the hesitation, the vehicle accelerated painfully slowly. Prior to this incident, a heavier rumble or rough idle was noted upon engine startup. There was no Check Engine Light or warning message displayed on the dashboard. Bypassing the issue via Sport Mode was unsuccessful. This is a brand-new vehicle leased only two weeks ago. I am fearful to drive it at this point.

Filed Nov 2, 2026 · Engine · FL

Check engine light came on and vehicle would not accelerate or was having problems with acceleration. Safety was put at risk in a way that did not know if the car was going to go tor completely stop vehicle felt like it was stalling Check engine light on

Filed Oct 12, 2026 · Engine, Fuel system · KY

Sitting at a red light car stalled. motor turned off and i had to restart my car. Idle mode was off. My car vibrated and then the engine light came on.

Filed Aug 13, 2026 · Engine · AL

Vehicle: 2026 Jeep Grand Cherokee L Limited Location: [XXX] Safety Issue Description: When using the remote auto‑start with the key fob, the engine starts briefly and then shuts off. When the vehicle is manually started, the check‑engine light immediately illuminates and begins flashing, and the vehicle jerks violently even while in park. The flashing check‑engine light indicates an active engine misfire, which poses a significant safety risk due to potential engine stalling, sudden loss of power, and potential catalytic‑converter damage. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Filed Aug 1, 2026 · Engine, Transmission · FL

On 7/16/2026 exactly 1 week after i purchase the vehicle after fueling i drove about 1 mile when the car started to misfire, when attempting to accelerate. Check engine light flashes a few times and then went off. I then attempted to reverse into my driveway and when attempting to do so the vehicle shut off completely. But started right back up. I then called the dealership and was asked to bring it in. The dealership has the vehicle about 2 days and said it has been repaired it had bad spark plugs. When to get the car it drove fine with no issues until 7/28/2026 when i made an attempt to drive to work, i had driven about a mile from my home and car to a red light when the light turned green i attempted to accelerate and the vehicle was hesitate. Then a few warning lights came on that showed issues with electronic throttle control and electronic stability system service. The car would not accelerate over 20 mph and would shake when i attempted to press on the accelerator, the car was then towed to the dealership and much it has been at since 7/28. I received a online request for service approval from the tech on 7/29 in which they stated cylinders 1 &4 were showing misfired and they would look into replacing the spark plugs but that they would continue to work on the car. I then received a message from my service advisor on 7/31 that stated the spark plugs were replaced but the vehicle was still having issues, i should wait until 8/3 for an update. I have not even had the vehicle for 30 days and it’s been in the shop twice for the same issue with about 1,000 miles on it.

Filed Jul 27, 2026 · Engine · CA

While driving my 2026 Jeep Grand Cherokee, the check engine light began flashing (a flashing, rather than steady, check engine light typically indicates an active engine misfire). At or around the same time, the vehicle began shaking/vibrating noticeably, consistent with the misfire condition indicated by the flashing light. Separately, I experienced a failure of the vehicle’s push-button Start/Stop ignition system. When attempting to shut the engine off by pressing the Start/Stop button, the engine did not turn off as expected. The button had to be pressed several times before the engine finally powered off.

Filed Jul 25, 2026 · Engine · FL

While driving from Tampa to Miramar Beach, Florida, the vehicle operated normally on the highway. However, shortly after exiting the highway and driving in slow traffic, the engine temperature gauge suddenly rose into the red zone, and the air conditioning automatically shut off. I immediately pulled over and allowed the vehicle to cool. The engine temperature returned to normal, and after the engine cooled completely, I found that the coolant reservoir level was only slightly below the MIN mark. There are no visible coolant leaks, no check engine light, and no warning messages currently displayed.

Filed Jul 8, 2026 · Driver assistance, Electrical · HI

I am reporting a serious safety failure in my 2025 Jeep Grand Cherokee L (1,483 miles). On XXX, the vehicle was parked with my wife and young children inside. Upon starting it, the vehicle would not shift into gear, the steering wheel locked, and the front windows stopped working. The lane departure symbol lit up during the failure, and the vehicle would not shut off through normal controls. After two hours, we shut it off by disconnecting the battery. When restarted, the check engine light and other warning lamps came on, and the vehicle began shaking and rattling. No crash occurred, but with steering locked and children in the car, I had no way to safely disable the vehicle for two hours. This could have caused loss of control if it happened while driving. No prior warning signs occurred before the incident. The vehicle has not been inspected by a dealer or repair shop, as no certified Jeep dealership exists on Lanai, Hawaii, where I reside; shipping the vehicle requires barg transport to XX or XXX. The vehicle is available for inspection on request and is currently not in use. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Filed May 13, 2026 · Engine, Fuel system · NC

I purchased a brand new 2026 Jeep Grand Cherokee L Summit in April 2026. At approximately 1,205 miles, while traveling with my wife and [XXX] child in [XXX] , the vehicle suddenly developed a flashing check engine light and severe engine misfire condition. The engine began shaking violently, idling rough, and lost smooth drivability during operation. I scanned the vehicle using an OBD-II scanner and the PCM stored diagnostic trouble code P0302, indicating a cylinder #2 misfire. Due to concern for vehicle safety and possible engine damage, the vehicle was towed to Vaden Chrysler Dodge Jeep RAM for diagnosis. The dealership later advised me that the spark plug in cylinder #2 had cracked porcelain and that the vehicle requires spark plug replacement. The dealership also stated they were awaiting authorization/approval from Stellantis before proceeding with repairs. This failure occurred extremely early in the vehicle’s life and caused my family to become stranded during travel. A flashing check engine light indicates an active misfire severe enough to potentially damage emissions components and raises concerns about engine reliability and safety. I am concerned there may be a manufacturing defect, ignition system defect, spark plug defect, improper assembly issue, or another underlying engine-related problem. I am submitting this complaint so the issue is documented in case other owners experience similar early engine failures or ignition-related problems on this vehicle platform. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

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.