2021 Jeep Gladiator: start-stop system problems

Filed Jun 2, 2025 · Electrical, Engine · MI

Hi - So my 2021 Jeep gladiator has 2 batteries. The battery that controls the auto start-stop system failed (while driving). I was at a light on a busy road and the auto stop/start kicked in at a light but because of the failed second battery with no warning, my Jeep died would not start backup and I was unable to even get it into neutral. So I was forced to sit in heavy traffic until the wrecker came. My complaint it why no warning and why did it go into auto stop mode when the battery was in a failed situation.

Filed Jul 21, 2023 · Driver assistance, Engine · AZ

It got 7 problem issues and almost lost control due to electronic throttle control failed while drove on freeway and tow teardrop (1400 lbs) . Malfunction indicator light, traction on (could not turn off), electronic stability control active popped up ( could not turn off), service forward collision warning light, cruise control fault warning light, service stop/start system warning light, service adaptive cruise control warniing light (all of them popped up that could not turn off). I went to jim click jeep dealership and they never seen them before. I am very disappointed and I feel that my truck is "lemon" I told them to fix asap but they can not fix and have to wait till august 9 (appointment) to check whats wrong.

Filed Sep 22, 2022 · Engine · FL

2021 jeep gladiator. Consumer writes in regard to stop/start system not functioning. The consumer stated the stop/start feature reads as not ready. The dealer was unable to determine the cause of the failure.

Filed Jan 14, 2022 · Electrical, Engine · TX

The vehicle’s Auto Start / Stop System activates and shuts off the vehicle while the instrument cluster reads “STOP/START NOT READY”, in direct conflict with owner’s manual. Per the owner’s manual, the first condition for an Auto Stop with a manual transmission is that the instrument cluster must read “READY”. Other Jeep vehicles, clearly show “READY” on the instrument cluster before shutting off. However, the Jeep Gladiator presents a false / incorrect “NOT READY” notification to the driver on the instrument cluster before shutting off. This anomaly with the Auto Stop / Start System distracts the driver and creates confusion impeding normal driving operations such as stopping at traffic lights / signs, pedestrian areas, and parking lots. This poses a serious safety hazard as the vehicle will unexpectedly shut off when the driver is not prepared and presented with an incorrect notification warning. In heavy traffic, this could lead to a stalled vehicle and a rear-end collision. The “NOT READY” malfunction was reproduced and confirmed by multiple service personnel at 2 different dealership, who expressed safety concerns. The “NOT READY” malfunction was also recreated by 4 independent mechanic shops and documented as a safety concern. However, an FCA Technical Advisor (TA) claimed that the vehicle was “operating as designed“. The vehicle is NOT operating as designed, as the Jeep design engineers would likely not design a vehicle that presents blatantly incorrect information to the driver. If this display screen on the instrument provides false information to the driver, other displays may also provide false readings to the driver. I feel unsafe driving the vehicle. The vehicle is available for inspection upon request.

Filed Jan 14, 2022 · Electrical, Engine · TX

The vehicle auto stops when putting on the driver’s seat belt, in direct conflict with owner’s manual. The owner’s manual specifies that if the “Driver’s seat belt is not buckled” it will prevent an auto stop, but preventing the auto stop is the opposite of the act of buckling the seat belt initiating the auto stop. Furthermore, the instrument cluster does not present a “STOP/START READY” message which is the first necessary condition for an auto stop. This issue creates a serious safety hazard, as the vehicle presents factually incorrect information to the driver and the vehicle unexpectedly stops creating driver confusion and distraction. Additionally, this creates a serious safety hazard as the issue inhibits the driver from attempting to flee an emergency situation, wherein the driver hops into an idling vehicle, plugs in their seat belt, and the vehicle turns itself off. The malfunction was reproduced and confirmed by multiple service personnel at 2 different dealerships, who expressed safety concerns. The malfunction was also recreated by 4 independent mechanic shops and documented as a safety concern. However, an FCA Technical Advisor (TA) claimed that the vehicle is “operating as designed“. This portion of the vehicle’s Auto Start / Stop System is NOT operating as designed and documented in the owner’s manual. I feel unsafe driving the vehicle, as this is one of numerous hardware / software malfunctions plaguing the vehicle. The vehicle is available for inspection upon request.

Filed Jan 14, 2022 · Electrical, Engine · TX

The vehicle auto stops when turning down or turning off the climate controls, in direct conflict with owner’s manual. This condition is not listed as one of the three conditions to activate an auto stop in the owner’s manual. This condition is also not listed as one of the conditions that will inhibit the vehicle from an auto stop in the owner’s manual. Furthermore, the instrument cluster never presents a “STOP/START READY” message which is the first necessary condition for an auto stop. This issue creates a serious safety hazard, as the vehicle presents incorrect information to the driver and the vehicle unexpectedly stops in traffic which confuses and distracts the driver. The unexpected / wanted stop in heavy traffic could cause a rear-end collision leading to serious injury or death. The malfunction was reproduced and confirmed by multiple service personnel at 2 different dealerships, who expressed safety concerns. The malfunction was also recreated by 4 independent mechanic shops and documented as a safety concern. However, an FCA Technical Advisor (TA) claimed that the vehicle is “operating as designed“. This portion of the vehicle’s Auto Start / Stop System is NOT operating as designed and documented in the owner’s manual. I feel unsafe driving the vehicle, as this is one of numerous hardware / software malfunctions plaguing the vehicle. The vehicle is available for inspection upon request.

Filed Jan 14, 2022 · Electrical, Engine · TX

The vehicle auto stops when the hood is closed and the driver remains in the seat with the seat belt buckled. The owner’s manual specifies that an open hood will prevent an auto stop, but preventing the auto stop is the opposite of closing the hood initiating the event. Furthermore, the instrument cluster never presents a “STOP/START READY” message which is the first necessary condition for an auto stop. This issue creates a serious safety hazard, as the vehicle presents incorrect information to the driver and the vehicle unexpectedly stops which confuses and distracts the driver. Additionally, after jump starting another vehicle, the vehicle’s battery may be sufficiently depleted. Upon closing the hood, the vehicle could auto stop, and with the numerous other malfunctions impacting the auto stop system the vehicle may not be able to restart possibly leaving the driver stranded. The unexpected / wanted auto stop could cause a rear-end collision of the stranded vehicle leading to serious injury or death. The malfunction was reproduced and confirmed by multiple service personnel, who expressed safety concerns. The malfunction was also recreated by 4 independent mechanic shops and documented as a safety concern. However, an FCA Technical Advisor (TA) claimed that the vehicle is “operating as designed“. This portion of the vehicle’s Auto Start / Stop System is NOT operating as designed and documented in the owner’s manual. I feel unsafe driving the vehicle, as this is one of numerous hardware / software malfunctions plaguing the vehicle. The vehicle is available for inspection upon request.

Filed Jan 14, 2022 · Electrical, Engine · TX

The vehicle auto stops when the driver’s seat is not occupied, in direct conflict with owner’s manual. The owner’s manual specifically states that if the “Driver’s seat is not occupied” that the “engine will not stop.” Note that this system safety check is separate and distinct from the “Driver’s seat belt is not buckled” check. Furthermore, the instrument cluster never presents a “STOP/START READY” message which is the first necessary condition for an auto stop. The vehicle fails to properly check for the empty driver’s seat safety condition before auto stop. This auto stop violates Jeep’s published safety check condition and poses a serious safety hazard. This issue poses additionally serious safety hazards as the vehicle will shut off with the driver outside the vehicle, leaving the driver with an incorrect understanding that the vehicle is properly locked out from an auto start condition. Therefore, if the driver is operating on or under the vehicle with it auto stopped, the passenger can unintendedly auto start the vehicle resulting in a serious injury or the loss of a finger. Additionally, in thinking that the vehicle is off the driver may leave the vehicle unattended in their garage and after 5 minutes the vehicle will auto start filling the garage / house with toxic fumes and presenting a serious life-threatening fire hazard. The malfunction was reproduced and confirmed by multiple service personnel, who expressed safety concerns. The malfunction was also recreated by 4 independent mechanic shops and documented as a safety concern. However, an FCA Technical Advisor (TA) claimed that the vehicle is “operating as designed“. This portion of the vehicle’s Auto Start / Stop System is NOT operating as designed and documented in the owner’s manual. I feel unsafe driving the vehicle, as this is one of numerous hardware / software malfunctions plaguing the vehicle. The vehicle is available for inspection upon request.

Filed Jan 14, 2022 · Engine, Fuel system · TX

The vehicle auto stops when the steering wheel is turned, in direct conflict with owner’s manual. The owner’s manual specifies that “Steering angle beyond threshold” will prevent an auto stop, but preventing the auto stop is the opposite of initiating the event. Furthermore, the instrument cluster never presents a “STOP/START READY” message which is the first necessary condition for an auto stop. This issue creates a serious safety hazard, as the vehicle presents incorrect information to the driver and the vehicle unexpectedly stops in traffic which confuses and distracts the driver. The unexpected / wanted stop in heavy traffic could cause a rear-end collision leading to serious injury or death. The malfunction was reproduced and confirmed by multiple service personnel, who expressed safety concerns. The malfunction was also recreated by 4 independent mechanic shops and documented as a safety concern. However, an FCA Technical Advisor (TA) claimed that the vehicle is “operating as designed“. This portion of the vehicle’s Auto Start / Stop System is NOT operating as designed and documented in the owner’s manual. I feel unsafe driving the vehicle, as this is one of numerous hardware / software malfunctions plaguing the vehicle. The vehicle is available for inspection upon request.

Filed Jan 14, 2022 · Engine, Fuel system · TX

The vehicle auto stops when the defrost is turned off, in direct conflict with owner’s manual. The owner’s manual specifies that “HVAC is set to full defrost mode” will prevent an auto stop, but preventing the auto stop is the opposite of initiating the event. Additionally, this issue occurs when the HVAC is operating at less than full defrost mode. Furthermore, the instrument cluster never presents a “STOP/START READY” message which is the first necessary condition for an auto stop. This issue creates a serious safety hazard, as the vehicle presents incorrect information to the driver and the vehicle unexpectedly stops in traffic which confuses and distracts the driver. The unexpected / wanted stop in heavy traffic could cause a rear-end collision leading to serious injury or death. The malfunction was reproduced and confirmed by multiple service personnel, who expressed safety concerns. The malfunction was also recreated by 4 independent mechanic shops and documented as a safety concern. However, an FCA Technical Advisor (TA) claimed that the vehicle is “operating as designed“. This portion of the vehicle’s Auto Start / Stop System is NOT operating as designed and documented in the owner’s manual. I feel unsafe driving the vehicle, as this is one of numerous hardware / software malfunctions plaguing the vehicle. The vehicle is available for inspection upon request.

Filed Jan 14, 2022 · Electrical, Engine · TX

The vehicle auto starts when opening the driver’s door. This is not listed under “Conditions that will cause the engine to start automatically while in STOP/START AUTO STOP ACTIVE mode” in the owner’s manual. Other Jeep models do not auto start upon opening the driver’s door. This auto start issue poses a serious safety hazard as the vehicle will unexpectedly start and begin to roll when the driver’s door is open and the driver is not properly secure in the driver seat. The unexpected / wanted start could cause a collision with another vehicle or pedestrian leading to serious injury or death. The malfunction was reproduced and confirmed by multiple service personnel at 2 Jeep dealerships, who expressed safety concerns. The malfunction was also recreated by 4 independent mechanic shops and documented as a safety concern. However, an FCA Technical Advisor (TA) claimed that the vehicle is “operating as designed“. This portion of the vehicle’s Auto Start / Stop System is NOT operating as designed and documented in the owner’s manual. I feel unsafe driving the vehicle, as this is one of numerous hardware / software malfunctions plaguing the vehicle. The vehicle is available for inspection upon request.