2023 Jeep Wagoneer: check engine light

Filed Nov 6, 2026 · Electrical, Engine · NH

The check engine light illuminated on my dashboard when I was driving with my family. On 4 separate occasions as I was coming to a stop, the vehicle unexpectedly shut off (driving at about 5 MPH). When it shut off, it shifted itself into Park and the parking brake was auto-applied. On each of the incidents, I was able to manually restart the vehicle by pushing the ignition button and shifting it back into Drive.

Filed Apr 25, 2026 · Electrical, Engine · NY

It seems that when the outside temperature is very warm/hot, when turning the car on or when idling at a traffic light or driving at very low speeds, on occasion the car will abruptly and without warning, shift itself into Park and the emergency brake activates. I took the vehicle in for repair on 10/23/25 and was told there was a "thermostat internal failure" and that the "thermostat assembly" was replaced. I was just recently traveling in Florida ( reside in NY) and the exact same problems occurred with my vehicle which I can only assume was due to the warmer temperatures that my vehicle has not been exposed to since the last repair as I reside in New York. I feel it should be worth mentioning that when turning OFF the auto start/stop button, the problems occurred less frequently but STILL happened on occasion. I've also had 3 other times when the "check engine" light came on. I was told that the first 2 were related to software updates with the transmission. On the other occasion, a "valve body" was replaced. I'm unsure if any of these were related. I've also had to replace the auxiliary battery but I don't think that's related so I didn't upload that file. Although I'm taking the vehicle to be repaired today, I took it in on 04/14/26 because the check engine light came on while in Florida when the car shifted itself into Park and the Emergency Brake was activated. The check engine light almost never comes on when this happens which I was told makes it difficult to diagnose issues. I didn't know how long this info is stored so I took the vehicle in upon returning to NY and was given a Summary Report after they hooked up a scanner. I couldn't get an appointment until today

Filed Mar 16, 2026 · Electrical, Engine · IN

On 10/27/25, the thermostat on my wagoneer exploded. It was supposedly repaired on 10/30/25. I read in the wagoneers forum that the thermostat is a common issue, but it could be the result of engine problems. On 2/4/26, I took my vehicle in for a routine oil change. I didn't drive the vehicle for a few days. On 2/7/26, I was driving and received an Error Message stating Max Engine Oil Level Exceeded. Immediate Service required. I returned it to the dealer to fix that issue. On 2/15/26, I noticed that my engine sounded louder than normal and by 2/16/26, the check engine light was on. On 2/18/26, I received an error message saying the engine temperature was too hot. I took it back to the dealership where it is today. I believe the wagoneers have faulty engines that need to be recalled.

Filed Feb 12, 2026 · Electrical, Engine · MD

This complaint involves a 2023 Jeep Grand Wagoneer L Series III, a full-size luxury SUV. The vehicle has experienced repeated electrical and powertrain failures culminating in complete loss of propulsion. On 01/22/2026, while traveling approximately 45–50 mph, the vehicle abruptly shut down without warning. The engine lost power, dashboard displays went black, and multiple warning lights illuminated simultaneously. I was forced to steer to the shoulder while a trailing vehicle had to swerve off the roadway to avoid a collision. This was a near-miss event and represents a serious safety hazard involving sudden loss of motive power at highway speed. Prior to that event, the vehicle had already stalled at a traffic light and had exhibited repeated check engine warnings, low-voltage faults, and module communication errors. The servicing dealer documented multiple diagnostic trouble codes affecting the Body Control Module (BCM), Ignition System Control Module (ISCM), and Powertrain Control Module (PCM). Manufacturer technical service bulletin software updates were applied in attempts to correct the issue. Despite these interventions, the electrical instability persisted. On 02/12/2026, only days after an auxiliary battery replacement intended to address voltage concerns, the vehicle would not start and required towing to the dealership at my expense. Additional fault codes are currently under review. The vehicle is also subject to an open recall with no remedy available, and the power running board motor has failed with replacement parts unavailable. This pattern of electrical failure, sudden shutdown in motion, and inability to reliably start presents an ongoing and unacceptable safety risk to occupants and surrounding motorists. The vehicle is available for inspection and has been repeatedly evaluated by an authorized dealer.

Filed Dec 4, 2025 · Electrical, Engine · IL

The contact owns a 2023 Jeep Wagoneer. The contact stated that on several occasions, while driving at various speeds and continuing to accelerate, the RPM failed to respond as needed. Additionally, while slowing down the RPM failed to lower. The contact stated that the check engine warning light illuminated, or the message to check the user manual for proper oil and fuel usage was displayed. The vehicle was taken to a dealer, where it was diagnosed, and determined that a system update was needed. The vehicle was repaired, but the failure reoccurred within several months. Additionally, the contact stated that while driving on several occasions at various speeds, the entire instrument cluster became inoperable, with the speedometer remaining at 0 MPH, or the message to "Depress Brake Pedal to Start Vehicle" was displayed. The vehicle was taken to the same dealer on several occasions, where it was diagnosed and determined that both batteries needed to be replaced. The vehicle was repaired, but the failure reoccurred within a month or two. The contact stated that on one occasion, the electrical cluster was replaced. The vehicle was repaired, but the failure reoccurred within a month. The manufacturer was notified of the failure. The failure mileage was unknown.

Filed Nov 12, 2025 · Electrical, Engine · GA

For the past five months, the vehicle has stalled nearly every other day, including while backing out of driveways or parking spaces and when slowing to stop. Each time, the engine suddenly shuts off without warning, the transmission automatically shifts into Park, and the emergency brake engages. An engine warning light appears with a “battery fault” message. The repeated engine shutdowns and automatic braking create a serious safety risk, particularly when backing into traffic or stopping at intersections. In several instances, the vehicle would not restart for several minutes, leaving it disabled in the roadway. The vehicle has been taken twice to the authorized Jeep dealership in Stonecrest, Georgia, but the service department was unable to reproduce or correct the issue. The problem persists, and the “battery fault” light continues to appear intermittently. Component or System: Engine and electrical system (battery and power management) Availability for Inspection: Vehicle available upon request

Filed Nov 5, 2025 · Driver assistance, Electrical · KS

The vehicle was bought June 2023, starting September 2023 we have had continual electrical problems. The blind spot warning system constantly activates and takes over. The automatic braking system randomly activates for no reason. The car will go into full braking and stop. This will happen at all speeds to include highway speeds. Now I am getting check engine lights and the code changes every time the light activates. When we take it to the dealership for service all we get is "we can't replicate the issue" and nothing is fixed. I ran a Car Fax and found that instead of coding the problem that it was brought in for, Jeep has coded it as maintenance inspection or electrical system checked. This is even when modules, radios or electrical systems have been replaced. I have a feeling that Jeep is coding this way to avoid recalls or to hide problems. I would think this constitutes fraud. My Jeep has serious electrical issues that Jeep will not address. I am stuck driving it as it is my only vehicle.

Filed Aug 22, 2025 · Engine, Transmission · TX

While driving the vehicle the oil engine light came on as well as a front collision warning lamp. The car then would not go into a higher gear. The air condition shut off and the car started making an electric type of noise and started slowing down and eventually stopped leaving myself and my two children stranded. This put both myself and my two children at risk. We had to get transportation home and get the car towed to the dealership and they confirmed that it is a malfunction of the thermostat which they relayed is a KNOWN ISSUE with this model of car and its engine. There has been a recall with Jeep, but only with a portion of its vehicles and my VIN was not included.

Filed Dec 5, 2024 · Electrical, Engine · WI

Our problems started with getting a message that said "check user manual for proper fuel and oil" when we accelerated. We just thought that was a warning sign, discussed this with the car dealership, and we were indeed using the correct fuel. When on the interstate going 70mph the car started rocking back and forth with the check engine light turned on. Took it to the dealership and they said it was computer updates, whichever helped for a couple months and then we continued to get the same message. Throughout our entire year and a 1/2 having the car, our tailgate has managed to fail four times now.The trunk has opened while driving, having stuff fall on the highway. We have gotten stuck places with the trunk not being able to shut. While driving on the highway, the power steering light turned on and the wheel locked up, I had to coast off the road at a corner. We are at the point where we are now 5000 miles over our warranty, driving down the highway once again, and the car started overheating. It said the the oil temp was low, and the coolant temp was high, but had the proper amount of coolant and oil in the car just even had the oil changed. We let the car cool down and luckily were luckily we were a couple blocks from the dealership. Drove a little further and the car overheated again, so my husband literally pushed the car where I coasted down the road to the parking spot. Over the year and a half we have also had the AC fail multiple times along with the back up camera. Also, one morning woke up to the car being dead, no lights were left on. Dealership is being very shady. I told them we will be looking into a lawyer and now they won't give me any documentation about my car. They said it's a faulty thermostat and the engine possibly could be bad but they won't know until the thermostat is fixed. Car back latch is also failing again while it sits at the dealership. I refuse to pay for this car. It's not safe. Complete piece of crap.

Filed Oct 12, 2024 · Electrical, Engine · MA

I bought this vehicle used form Carmax, <12000 miles. Drove about 12 miles, when while parking I noticed the car stopped and asked to start engine and engage gear again. Didn't think much of it. Then started driving again and the check engine light turned on. There are lots of reports of wagoneers with engine light problems (in fact we had test driven a different one with both check engine and transmission lights on which for obvious reasons didn't buy). I reported to Carmax. Finished my drive and stayed idle for a while trying to see if there were any settings that may be responsible, but the engine was stuttering, almost shutting off, with the entire thing, even the driving lights shutting off intermittently. The following day I took the vehicle for a check at Carmax, and while slowing at an intersection to let a school bus pass, the car completely shut down. I started again and drove very carefully. They could not diagnose the problem at Carmax and they wanted to send to Jeep. I eventually returned the vehicle. I had seen reports of many problems with the 2022 Wagoneer model, but none about the 2023, but I now came across forums where people even describe complete shutdowns of the vehicle while driving in the highway. While I returned the vehicle, I think these serious engine and system failures could endanger others on the road. I took videos and pictures of the problems. Happy to share if you request them.

Filed Aug 6, 2024 · Engine · ME

I worry about the reliability of the vehicle. I have had it since June of 2023 and since I have purchased the vehicle, I have had nothing but issues. It has now been towed twice back to the dealership for engine issues. I have tried to reach out to many different people to try and get this resolved with no luck. I have 2 small children that rely on my transportation along with getting myself to and from work. The first time that I brought the car in was July 2023 (mileage was 5000) for the engine overheating, it was fixed late September and back in October with the engine shaking and check engine light on. It then was "fixed" and went back in March with the same check engine light and engine shake, I changed my tires to see if that would help with the shake per the dealership request and it did not, I came back in April twice and then May. It has now been towed from my home to the dealership once again pending some resolution from here. It has been at the dealership for 80+ days with these engine issues. I have been fighting with the reliability of my vehicle since I first purchased it and have had no luck with it. My fear is being left somewhere with my 2 small children without a vehicle, again. I am requesting Wagoneer purchase the car back from me so I can have dependability back for myself and my family. The service department has been a nightmare to work with in regard to getting them to fix the vehicle. I have been promised a call back a few times and I have got nothing. I have also made the attempt to get Bessey's to repurchase the car this vehicle as it has failed me so many times. At this point I am really upset with this company and its unwillingness to help. My car has been their time and time again for the same repair attempt. In all honesty, I don't believe my concerns are being taken seriously as it is STILL not driving as it should. Engine still shakes during acceleration and check engine light will appear.

Filed May 20, 2024 · Electrical, Engine · 2,500 miles · TX

The contact owns a 2023 Jeep Wagoneer. The contact stated that while driving at various speeds, the parking brake was independently engaged. Additionally, the front driver’s and rear passenger’s side windows would independently lower while driving. The contact stated that the vehicle would jerk while depressing the accelerator pedal, with the check engine warning light illuminated. The contact would restart the vehicle after each failure to resume normal operation. The vehicle was then taken to the dealer where the vehicle was serviced. Despite the initial repair, the parking brake and jerking persisted with the check engine warning light illuminated after each repair. After one visit, the check engine warning light returned soon after exiting the dealer parking lot and the vehicle was towed back to the dealer for service. The contact stated that the catalytic converters were replaced, and several electrical features were reset; however, the failure persisted. The manufacturer was notified of the failure. The vehicle was not repaired. The failure mileage was approximately 2,500.