2019 Jeep Grand Cherokee engine problems

Filed Sep 15, 2026 · Engine · MO

Service engine light came on and code read misfire. Tech said that ignition coil one needs replaced and it needed a tune up. They replaced all ignition coils, spark plugs and intake manifold gasket with tune up. Tech said that coolant looked low and checked the reservoir. He said there's a lot of chunks and dried out looking coolant in the reservoir. Recommended a coolant flush at the dealership. Tune up cost almost 1000 dollars. A few days later my teenage son was driving on the highway at 70 mph and out of nowhere a engine overheating warning flashed and the temperature went all the way up and then down and back and forth. My son had to try and get pulled off of the busy highway while overheating. Car was blowing out white smoke. He was stranded over an hour away from home. Had to have car towed. Was told by the mechanic the next day that the plastic oil cooler had cracked and the oil got into the coolant. Causing the engine to fail at only 104,807 miles! Cost for a new motor was 10,400! Shop said he just had the same thing happen on another vehicle with the same engine the week before mine! I had to pay out of pocket for the new engine. Obviously there's a safety defect in the plastic oil cooler causing several people to experience the same thing happening! There was no warning before the oil got into the coolant. Why is the same thing happening to so many people but nothing is being done about it? Having to replace the engine at 104,807 miles is insane. How many times does it have to happen before they recall the problem?

Filed Sep 3, 2026 · Engine · MA

We found a huge spillage in our driveway and it had a color of yellowish Brown. Took it to the dealership tech found oil and coolant were mixed together and coming out of the overflow tank. Because the oil in the coolant mixed together, it went through all the components in the engine and it is a total loss. The car does not work and it needs a new engine. Had another independent car shop. Look at the car in they agreed. We had no signs of warning of anything being wrong with the car. It ran fine. The temperature gauge remained normal and never overheated. I am reading about a class action lawsuit about this situation that happened to multiple Jeep Grand Cherokees. Since the dealership told us it's a total loss. If you wanted to fix it, it will cost us over $10,000. The mechanic told us that this is not drivable even if you try to drive the engine will 09lock up and you can get into a major accident or even cause one.

Filed Aug 19, 2026 · Engine · WA

Component Failure & Inspection: The engine water pump assembly failed. This specific failure is a documented factory defect explicitly covered under manufacturer Technical Service Bulletin (TSB) #9100212 and tracked under the federal safety agency ID #10244344. The failed component was replaced by an authorized dealership; the physical part is not available, but full diagnostic logs and proof of failure are stored in the manufacturer database under University Auto Center invoice #6044139/1. Safety Risks: The water pump suffered a sudden, catastrophic structural failure while operating at highway speeds—a known vulnerability detailed in TSB #9100212 and the federal safety agency ID #10244344. This caused an immediate loss of engine coolant and a rapid spike in engine temperature. The vehicle lost power and was forced to make an emergency pull-off onto a busy highway shoulder, stranding occupants in a highly vulnerable position. A sudden cooling failure at highway speeds creates an immediate risk of engine seizure, vehicle fire, or traffic collision while disabled on the roadside. Dealer Confirmation & Inspection: Yes. The failure was inspected, reproduced, and confirmed by an authorized manufacturer dealership (University Auto Center). The dealer confirmed that the water pump assembly completely failed and required replacement, perfectly mirroring the defect parameters outlined in TSB #9100212. Warning Lamps & Prior Symptoms: There were no prior symptoms, noises, or early warning indicators. The component failed instantly without warning. The first indication was a sudden, rapid flashing of the engine temperature warning light and an "Engine Overheating" message on the dashboard cluster, immediately followed by a loss of power.

Filed Jul 23, 2026 · Engine · NY

2019 Jeep grand Cherokee, noticed to have leaking water pump, engine showed no signs of overheating. Water pump and thermostat changed due to a small fluctuating of temp gauge but never over the half way mark. Took it in for diagnostics, which, after reading many reviews of ongoing issues with head gaskets in jeeps, even after Jeep said they remedy it in 2016, I asked for diagnostics done on my radiator and head gaskets to only see it was in fact leaking head gaskets. There was no signs other than a leaking water pump and small fluctuation when the water pump started to leak, but engine never read that it was overheating nor did oil temp. Seems to be an ongoing issue with the 3.6L engines that Jeep is still selling and a lot of people are paying for major engine repairs, at such lower mileages.

Filed Jun 26, 2026 · Engine · ID

One day after driving the vehicle around town and after we parked it in the garage, we noticed a large pool of oil on the garage floor. After taking it to a service station, for inspection, we were told that the oil leak was caused by a cracked plastic oil cooler. We were told if we had not noticed the oil leak, the engine could have locked up and caused a serious accident. The next day we were going to take the vehicle on the highway for a trip. The service station said they have had multiple cracked plastic oil coolers come in for repairs on the same vehicle, year, make and model. There was no warning.

Filed Apr 1, 2026 · Acceleration, Engine · NY

While attempting to park my vehicle, it suddenly accelerated on its own, causing the car to move quickly toward a tree and a nearby building. I immediately attempted to stop the vehicle by pressing the brake pedal, but the car continued to accelerate. The engine was roaring, and I even tried using both feet on the brake pedal in an effort to stop the vehicle, but it did not respond. The only way I was able to stop the vehicle was by turning off the engine. Due to the unexpected acceleration and my concern that it could happen again, the vehicle was not safe to drive. A tow truck was called, and the vehicle was transported to a mechanic for inspection.

Filed Mar 21, 2026 · Engine · TX

Vehicle: 2019 Jeep Grand Cherokee Engine: 3.6L V6 (Pentastar) While driving on the highway, the vehicle experienced a sudden engine overheating condition, followed by a catastrophic failure of the coolant recovery tank. This failure created a serious safety hazard and appears to be the result of a known and well-documented head gasket defect in the 3.6L engine used in Jeep Grand Cherokees. While driving at highway speed, the vehicle was operating normally until I made a left turn. Immediately after the turn, the engine temperature began to rise rapidly, indicating an overheating condition. I turned around and began driving back toward my residence to avoid further damage or a roadside breakdown. Before reaching home, the coolant recovery tank violently exploded, releasing coolant throughout the engine bay. As well as strong burning coolant chemical smells throThis occurred while the vehicle was still in operation and could have resulted in loss of visibility, fire risk, or complete engine failure while driving. After inspection by a qualified professional, the failure was confirmed to be caused by a failed head gasket, which allowed combustion gases to pressurize the cooling system until the coolant recovery tank ruptured. This failure occurred without warning and while the vehicle was being driven on public roadways. A sudden coolant system explosion and rapid overheating can result in: Loss of engine power while driving Fire risk from hot coolant contacting engine components Loss of vehicle control Stranding occupants in unsafe conditions This represents a significant safety defect. Jeep Grand Cherokees equipped with the 3.6L engine are widely known to experience head gasket failures, typically occurring between 50,000 and 75,000 miles. Despite this known issue, Stellantis/Chrysler has not issued a recall, technical service campaign, or extended warranty related to this defect.

Filed Mar 11, 2026 · Electrical, Engine · FL

The vehicle will shut down while in gear and driving at lower speeds. Happens at least 2-3 times per day for last 3 weeks

Filed Mar 9, 2026 · Engine · 76,000 miles · NY

The contact owns a 2019 Jeep Grand Cherokee. The contact state while driving at various speeds, the engine overheated and there was a misfire coming from the engine. The check engine warning light was illuminated. The message that the Auto START/STOP system needed to be serviced was displayed, and that the engine was overheating. The vehicle was taken to the dealer on several occasions, and the camshaft, the water pump, and the EGR were replaced; however, the failure persisted. The vehicle was taken back to the dealer, where the camshaft phasers and the oil control valve were replaced. The vehicle was repaired. The manufacturer was not contacted. The failure mileage was approximately 76,000.

Filed Mar 6, 2026 · Engine · TX

While driving at highway speeds, with no warning, my vehicle shuts off forcing me to perform and emergency exits. In these situations, I have observed the dashboard screen directly in front of me read: Vehicle Not In Park