2020 Jeep Gladiator: start-stop system problems

Filed May 18, 2025 · Electrical, Steering · TN

While driving in rush hour traffic, stop and go driving, a service shifter message started to intermittently appear, then the forward collision warning message started to frequently chime in and off, then I lost power steering, check engine light illuminated, other messages auto start stop service, service sway bar disconnect, transmission was stuck in 3rd gear then after a stop it would not shift out of 1st even switching to manual shift mode, was able to pull over to side of road. Turned off the vehicle, used my code reader to clear the codes, started the vehicle back on and everything was clear and vehicle drove as normal. Sure glad it didn’t happen at speed! I have read of other people having the same issue so I wanted it to add my concern as well.

Filed Apr 8, 2025 · Electrical · 48,000 miles · NC

The contact owns a 2020 Jeep Gladiator. The contact stated while driving at various speeds, the instrument cluster was intermittently inoperable. The contact stated that upon restarting the vehicle, the instrument cluster turned on but displayed erroneous information on several occasions. Additionally, the contact stated that he had disengaged the engine Auto Start/Stop System; however, the system recently started to re-engage unintendedly while at a complete stop. The vehicle was taken to the dealer however, the failure could not be duplicated. The dealer informed the contact that the electronic system was functioning as needed. The vehicle was not diagnosed or repaired. The contact related the failure to the federal safety agency Campaign Number: 24V652000 (Electrical System); however, the VIN was not included. The manufacturer was notified of the failure and informed the contact that the VIN was not included in a recall. The failure mileage was approximately 48,000.

Filed Sep 10, 2024 · Electrical, Engine · TX

Driving on hwy at 55 miles per hours complete power loss. No engine no electrical. I was able to coast to stop but was not able to activate hazards . I had just had the aux battery for auto start stop replaced by lithia Jeep dealer in corpus Christi

Filed Jun 24, 2024 · Suspension, Transmission · VT

Multiple issues occuring starting (documented) at 22,719 miles (09/27/2022) - stop/start and remote start had not been functioning properly - vehicle died. Required towing to dealer. Both batteries were dead. Upon leaving dealer they had not reconnected stop/start. Fast forward to 05/04/2024 and vehicle once again unchargeable to start. Took warrantied battery back to dealer and they wanted us to tow it there to check. We spent 350.91 to replace ourselves due to a lack of confidence with Jeep. Then on 05/20/2024 took it to a 4x4 center and discovered multiple issues with vehicle from manufacturing and dealer work. To start -- 1) the rear differential pinion seal is leaking 2) the power stearing box is aluminum and showed signs of flex and contact 3) dealer installed lift was incomplete leaving the front axle off center (visually observed about a 3" offset).

Filed Jan 10, 2023 · Electrical, Engine · MN

The ESS/Auto Start/Stop system is unavailable rendering the remote start for cold weather unavailable. This issue also effects the reliability of the battery and electrical supply as a whole potentially leading to unexpected engine stoppages and stranding due to a no start scenario. The issue is widespread and well documented among 2018-Current Jeep Rangler models as well as 2020-Current Jeep Gladiator models. Causes are reported by dealers ranging from premature failure of the start/stop auxiliary battery to TPM/distribution box failures. My vehicle has experienced this issue twice with the first occurrence shortly after purchase. With many of the effected vehicles reaching the end of their warranty period, the number of vehicles circulating on highways will increase creating a safety hazard. Further, the failure of this system may create an EPA compliance issue as the ESS/Auto Start/Stop system is required equipment to meet EPA fuel economy standards for the fleet.

Filed Jul 20, 2022 · Engine, Fuel system · TN

I have had this vehicle in the shop more times than it has been on the road. It originally started with the auto start stop sensor. They told me to turn that off. They did an update. And it kept happening over and over again where it would cut itself off and I couldn’t get it restarted. The fix worked for maybe a month and it started all over again. Now the engine light is on I can be doing 30 miles an hour down the middle of town and it dies even with the auto start stop turned off. The steering is so loose that you have to fight it all the time to keep it in the road. The engine light is on and stays on. And it sounds like a scraping when the vehicle is in motion but the tires have clearance and no issues with their clearance. Checked under the vehicle nothing is under the vehicle. This vehicle has never been off road. I believe it qualifies as a lemon.

Filed Sep 1, 2020 · Engine · 1,700 miles · MD

2020 jeep gladiator at 1760 miles numerous auto start stop failures with check engine light and p300 code (engine misfire). Took to the dealer and was told bad gas and they reset the code. At 1900 miles after numerous auto stop start failures check engine light back on with noticeable misfires on cold start. Dealer changed coils and plugs. At 2300 miles check engine light back on with noticeable misfires. Dealer changed egr valve and did a software update. At 2850 miles check engine light back on. Dealer did another software update. 2 days and 50 miles later check engine light on with noticeable misfires. Currently at the dealer for 10 days later with no fix in sight. Many gladiators have this misfire problem.

Filed Aug 26, 2020 · Engine · 1,036 miles · WA

Auto start/stop unavailable warning light on cold start. Rough engine idle until up to temperature. Check engine light on next cold start. Code p0300 (multiple cylinder misfire). This had happened several times. This is my third time taking it in and now they are tearing down the engine on a truck with 1000 miles on it. Every occurance was cold start on engine and after putting truck into gear at low speed.

Filed Jun 25, 2020 · Engine · 160 miles · TX

Multiple cylinder misfires. Engine running with vehicle in motion. First occurrence at 160 miles on brand new vehicle. Check engine came on and auto stop/start warning messages and light appeared. Took to dealer. They cleared engine misfire code and made no repair. Check engine light and auto stop/start light came back on when underway on same day that vehicle was picked up from dealership. Took back to dealership. Said it was multi cylinder engine misfire. No diagnosis of cause determined nor repair plan identified. Vehicle has been in dealership shop almost five weeks now with no plan for remedying the situation. Jeep gladiator forum includes reports from over 30 similar situations with vehicles out of service. Response from fca virtually nonexistent.