2019 Jeep Grand Cherokee: misfire or rough idle

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 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 Feb 24, 2026 · Engine · MI

2019 jeep grand Cherokee 3.6L. Severe misfiring on expressway causing vehicle to shake uncontrollably and stall. “Pentastar tick” Ticking sound coming from engine. Took to local repair shop and right cam shaft is worn down causing misfiring and engine damage. Cost is $4,000 for the camshaft replacement and will likely need a new engine. Vehicle has less than 109,000 miles on it. Known issue on this vehicle, I called multiple shops and they all said that the can shaft is probably bad because they see the issue all the time.

Filed Sep 30, 2025 · Engine, Suspension · CA

Vehicle reverse camera will stay on while driving. Leak in gasket. Leak in right mount. Radiator issue undiagnosed. Car is available for inspection at anytime as it is currently inoperable and I do not have the thousands of dollars to fix what is wrong with it while it only has 53k miles and licensed repair shop (not dealership as I was told by tech there to get initial issues fixed outside for a lower cost - all repair and service records also available) has advised faulty parts as listed above. Forgive me, I am not a car person so I do not know what exact things, but can provide. Have been on the phone all morning with FCA, manufacturing, and back and forth until this information was received. I have pulled a recall list by VIN and found that some issues with my Jeep are on there; however, apparently my specific VIN is not associated with the recalls listed (can provide report), I am responsible for repairs. Only warning lamp I have received was for a "cylinder 1 misfire" that was diagnosed at Jeep of Fontana in CA, where I was told to take it elsewhere. Now, after having a tuneup last week, I started my Jeep on Sunday and it began smoking. Was told at local shop, Mountain View Tire in Rialto/Fontana, they cannot fix. Please assist!

Filed Sep 8, 2025 · Engine · 97,002 miles · DE

The contact owns a 2019 Jeep Grand Cherokee. The contact stated that while driving at 65 MPH, the check engine warning light illuminated. The vehicle was taken to the dealer, where it was determined that the engine was misfiring and there was a minor water pump leak. The dealer changed the drive mode from level 4 to level 2, and the check engine warning light was reset. The dealer advised the contact to take the vehicle back to the dealer later. The vehicle was taken back to the dealer, where it was diagnosed and determined that the spark plugs, the cylinders, the head gasket, and other unknown parts needed to be replaced. The vehicle was not repaired due to the cost. The manufacturer was not notified of the failure. The failure mileage was approximately 97,002.

Filed Jul 17, 2025 · Engine · AL

My 2019 Jeep grand Cherokee currently has a blown head gasket. I have the 3.6 engine and I am finding out that this is a common issue for this engine. I have taken my car to the dealer and they have confirmed that it is a blown head gasket. Once you start the vehicle, it has a rough idle and smoke comes out of the tailpipe. Before I took the car to the dealer, I took it to a mechanic shop because the engine light came on and it was having the same issues as listed above, they had said there were misfires. I have regularly maintained my vehicle. This is a huge safety risk. Actions needs to be taken by Jeep to make this right, this is a very common issue that Jeep Grand Cherokee vehicles are seeing.

Filed Sep 17, 2024 · Engine · NY

Camshaft failure caused misfire while driving. The car is currently being repaired so there are no receipts yet.