2020 Jeep Grand Cherokee: check engine light

Filed Sep 20, 2026 · Brakes, Driver assistance · MI

ABS module completely malfunctioned from a shortage. Threw up 7 different codes, even threw up my check engine light for a bit. Can’t even use cruise control because my “memory system” and “park sense” are unavailable. Sometimes it makes the wheel super stiff and the acceleration and break pedals super sticky. I see many recalls for 2020 Jeep Grand Cherokee’s, and believe mine should be included. I should’ve have to pay $3,000 out of pocket for something a ton of people are reporting as an issue. I found one reported a few months back with the same issue.

Filed Jul 6, 2026 · Engine · 114,369 miles · MD

The contact owns a 2020 Jeep Grand Cherokee. The contact stated that while driving at approximately 20 MPH, the check engine warning light illuminated, and the vehicle jerked and lost power. The vehicle was taken to an independent mechanic, where the failure could not be replicated. The vehicle was then taken to another independent mechanic, where it was diagnosed that the camshaft, battery, and two oil valves in the starter needed to be replaced. The vehicle was not repaired. The vehicle was towed to a dealer, who provided the same diagnosis. The battery, starter, and two valves were replaced. The contact stated that the failures persisted while driving on several occasions, with the message "Oil Overheated" displayed, and the temperature warning light illuminated. The vehicle was then towed to an independent mechanic, where it was diagnosed that the camshaft needed to be replaced. The vehicle was not repaired. The manufacturer was not notified of the failure. The failure mileage was approximately 114,369.

Filed Mar 7, 2026 · Electrical, Engine · PA

on or around 12/15/2024 (42257 miles on vehicle) jeep will power on start and stop, all alights on dashboard light, unable to shift into or out of gear when parked. When driving but stopped at a red light car shut off. Attempted to restart unable to, car put into park attempted to restart lights came on but engine didn't turn over. Tried again few minutes laster and the car turned on. Returned apartment, parked car. was unable to shift car into park, car shut off on its own again, car then able to go into park. A few days later start engine, car turns on put car in reverse, car shut off on its own, all lights and warnings on dashboard light up and stay on. Unable to start engine, unable to shift car into park. turn car off, shift into park, on 12/17/24 Car towed to Lake Chrysler dodge jeep ram auto Lewistown PA. told that it was the can bus connector needed to be replaced. Part replaced. 10/10/25 (54630 miles) car in for inspection, oil change, reported to mechanic engine was making high pitched sound/noise when driving up steep hill on highway the week prior. Was told by mechanic "that is normal when driving up steep hills, after a long drive" " we didn't hear it or find anything" Car continued to make this noise on the same hill since. Car in for oil change at David Dodge on 1/12/26 (58,974 miles) reported to mechanic again that engine continues to make a high pitched sound/noise when going up hills, on highway drives and after longer drives. per shop nothing was found. Asked if I should make an appointment for it to be tested and told no not needed. On 3/2/26 check engine light on, waring start/stop unavailable service stop/start system this happened off and on for next few days. Car brought to mechanic on 3/6/26 (60,000 miles) diagnosic test run cylinder misfire, R and R intake manifold to check coil and spark coolant found on spark plug, borescope #3 cylinder Head gasket, cylinder head, block issue . Recommend total engine and radiator replacements

Filed Oct 17, 2025 · Engine · FL

Beginning October 3, 2025, the buyer reported a Check Engine Light (CEL) issue. 10.3.25 - The sale dealership stated diagnosis of a fuel leak. 10.8.25 - The sale dealership identified a charcoal canister issue. 10.13.25 - The sale dealership is referring to Jeep dealership. 10.17.25 - The sale dealership confirmed light continues to persist. To date the vehicle has been returned to the sale dealership three times since October 3, 2025. A warranty invoice shows only maintenance order performed occurred on October 3, 2025, and confirmed with the warranty company. This has been a persistant issue based on dates of service with only one repair attempt by the dealership while they maintain possession of the vehicle. Please investigate this issue to determine course of action. within these 10 days.

Filed Sep 18, 2025 · Engine · NV

I bought the vehicle Dec 29, 2024 and it had 79000 miles on it. I use it for work , that is driving to and from my job and to the bank and back for work. I would say that in March of 2025 I went to the bank and I got in to leave and put the vehicle into reverse and it would not go into reverse and a the engine light came on. I had to shut the vehicle off and wait 5 minutes and then try again to go into reverse. When I put it into reverse the r was flashing on the shifter and it said something about needing something to be serviced. So when I looked it up it said that was a sign the transmission was failing. I drove it a couple more times and it only happened 3 times total when it was unable to shift going forward. So I took it to a shop and was informed that the transmission was needing to be replaced. There is no reason the transmission should be going out of it. I live 5 miles from where I work and 15 miles from the bank. I dont abuse my vehicles so what is there an issue with the transmission.

Filed Aug 8, 2025 · Transmission · NY

Transmission, available upon request for inspection. Clunk’s into reverse, or doesn’t engage at all. Code p1da8, p0733. Has been confirmed by dealer. Will throw check engine light occasionally. Also shifts hard between gears 3 and 4.

Filed Jul 21, 2025 · Transmission · UT

At approximately 54,000 miles the transmission is not shifting. I parked in a parking spot, go into a store. Then come out and the vehicle will not shift into park or reverse. The check engine light came on for the park by wire issue. These transmissions have been known to have rough shifting and my vehicle has been no exception. It’s shifted rough at low speeds and the eco mode and auto start/stop system have also made it feel less than smooth to drive.

Filed Jun 16, 2025 · Engine · GA

[XXX] Utility 4D Altitude 4WD 3.6L V6 2020 Jeep Grand Cherokee My 2020 Jeep Grand Cherokee with 3.6L Pentastar V6 engine check engine light came on at 115,000 miles with a P0305 code. The P0305 code for a 3.6L Pentastar V6 engine indicates a misfire in cylinder number five. The week prior I performed a coolant flush and fill with the proper Mopar coolant. A few days later the water pump weep hole started leaking. I replaced the water pump and changed the spark plugs. A few days after this was when the P0305 check engine light came on and I could feel the engine starting to stumble from the misfire. No indication of overheating, coolant temperature was normal between 180 F and 210 F. I kept checking the coolant level and noticed the level dropping after a few days. There was no indication of a coolant leak after replacing the water pump. No coolant in the oil, or oil in the coolant and no white cloud from the exhaust from the coolant leaking into the combustion chamber, typically caused by a blown head gasket, cracked head or block or warped head or block. I set an appointment at the Jeep service department, and they informed me the engine had to be replaced. They said they did a bore scope test and a leak down test to confirmed the coolant was leaking into the cylinder. There are hundreds if not thousands of reports from other owners of Jeep Grand Cherokee and other Jeep, Chrysler, Ram, Dodge owners reporting this same issue. The attached photos show no coolant mixing with the or oil mixing with the coolant, resulting in the coolant only leaking through the combustion chamber to the exhaust confirming the service departments findings. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Filed May 14, 2025 · Engine · 61,000 miles · MI

The contact owns a 2020 Jeep Grand Cherokee. The contact stated while driving at undisclosed speeds, there was a misfire coming from the engine while accelerating, decelerating, idling, and while parked. The check engine warning light was intermittently illuminated. The vehicle was taken to the dealer, who diagnosed that the right-side intake camshaft on all 6 lobes had ground away and needed to be replaced. Additionally, metal was found in the rod bearings in the engine. The vehicle was repaired. The manufacturer was made aware of the failure and opened a case. The manufacturer referred the contact to the federal safety agency Hotline to report the failure. The failure mileage was approximately 61,000.

Filed Apr 7, 2025 · Transmission · VA

Transmission system failed causing slipping when going into 3rd gear. Dealership inspected it and is telling me the output shaft has to be replaced. The check engine light came on when it started slipping.

Filed Mar 12, 2025 · Transmission · NY

Car running fine no indication there was a problem, no lights on dashboard or sound. Jeep stalled on highway and engine light came on. Shut car off completely turned it back on and able to move to a safe location. Turned off car again for some time and when turned back on shift gear will not move into drive, reverse neutral. Needed to get it towed to mechanic who diagnosed it as a failed transmission at 88,000 miles. Towed to dealer who confirmed failed transmission. Was able to get cost assistance through jeep for 70 percent of cost but see the recent recalls on jeep because of transmission I feel it should have been a total replacement especially at u der 100,000 miles

Filed Jan 30, 2025 · ME

Service shifter light comes on, sometimes it makes the engine light come on and a message appears that says to safely stop the vehicle and put into park. Doing some research on this myself no help from Jeep I found that this could cause the tires to lock up because your Jeep thinks it was put into park as your driving causing a severe accident especially if your on the highway. I also found that you can stall instantly. Imagine having children in your vehicle on the highway and your Jeep just dies. I feel like this is a very serious safety issue that needs to resolved by Jeep. I've had my Jeep brought to a Jeep dealership 3 times now. Currently there as we speak. They have done extensive work to what "may" be causing the issue. They are now chasing wires. I've paid $800. out of pocket and my warranty has covered about 3k in parts. Jeep has been contacted by the dealer with no help or guidance.