2020 Jeep Gladiator: check engine light

Filed Jun 10, 2026 · Electrical, Transmission · TX

The start-stop system reports unavailable, then within a few miles of driving, the check engine light will come on, followed by problems with the transmission shifting gears, sometime causing the vehicle to stay in first or second gear while accelerating and creating a dangerous driving situation. Power cycling the vehicle sometimes helps. Diagnostic trouble codes show low voltage in one or more O2 sensors, "too lean" warnings and cylinders randomly misfiring. Engine runs very rough at idle with the strong smell of gas in the exhaust. Dash information shows battery voltage around 12.3 at start up increasing to low 13 while idling. This occured around 40,000 miles and dealer replaced the aux battery and reset system. It occurred again around 60,000 miles (20 months later) and owner replaced both auxiliary battery (testing showed bad) and main battery. System functioned normally after resetting codes. It occurred again about 8 months later at 72,000 miles. The F42 fuse was pulled, cleared codes and reset computer by removing battery power for 1 hour. System returned to normal.

Filed May 5, 2026 · Engine · OH

At 90k miles head gasket failed letting coolant in engine cylinders which was diagnosed and repaired by a Jeep dealer. At 130k miles engine light back on with dealer suggesting it is rocker arm/lifter failure with cylinders misfiring. At initial purchase of vehicle touchscreen would black out and restart. Dealer replaced with another touchscreen but issue still exists after warranty term.

Filed Jan 28, 2026 · Engine · NH

Engine failure due to coolant leak: in December, 2025, vehicle was towed to dealership due to overheating engine. While driving home from work, Vehicle was exhibiting engine overheating including temperature warning lights, temperature gauge fluctuating from normal to extremely high, a strange sound coming from the front of the vehicle (almost like a fan was not working) and running rough, like a diesel idle. I immediately pulled the vehicle off to the side of the road & shut it off. (Fortunately engine didn’t seize or exhibit these symptoms while I was on the highway just minutes before) I called dealership & they said it needed to be towed in. After having my vehicle for 10 days, Dealership stated thermostat needed to be replaced. Vehicle then exhibited same symptoms a few weeks later along with a check engine light, vehicle is returned to dealership. Dealership NOW tells me they’ve “seen enough of these to know that it’s most likely going to need a left side cylinder head” due to coolant leak into the engine. I am now aware there have been multiple reports to the federal safety agency for similar issues and that a service bulletin has been issued to the dealerships for this very reason: its a KNOWN issue with no recall in sight. Jeep at this juncture, acknowledging it’s a problem, REFUSES to assist with very costly repair, instead suggesting I should report to the federal safety agency.

Filed Nov 28, 2025 · Electrical, Steering · 100,000 miles · CT

The contact owns a 2020 Jeep Gladiator. The contact stated that while driving at various speeds, the messages "Gear Shift Reset", and "Loss of Stability Control" were displayed, and the check engine warning light, the brake system warning light and other unknown warning lights were illuminated. Additionally, the power steering feature suddenly failed to operate as designed. The vehicle was taken to the dealer, where it was diagnosed and determined that a wiring harness needed to be replaced. The vehicle was not repaired by the dealer; however, the contact completed the repair himself. The manufacturer was not informed of the failure. The failure mileage was approximately 100,000.

Filed Nov 13, 2025 · Engine · IL

My vehicle has a 3.6 pentastar engine. Around 75,000 miles the check engine light came on. I took it to the dealership to run diagnostics and find the problem. After completing the diagnostics the service tech informed me that is was an issue related to a TSB 09-011-25. This is a major manufacturing issue that causes engine failure. My engine needs to be replaced. This issue affects many vehicles in the Stellantis lineup and should be a recall. They have not made any effort to inform customers of this issue to have it inspected

Filed Sep 23, 2025 · Electrical · NY

IPC instrument panel cluster flashing for about a week then went blank total black out could not read important data to operate the car example check engine light gas speedometer tire inflation all safety on operating vehicle not to mention tbe blinking on and off dir a week ir so distracting you from driving the vehicle or worrying if you had gas ir tire pressure or set controls for your vehicle . The jeep mopar site says ipc malfunctioning , drive shaft malfunctioning as well as 1 other recall . I even called the dealer . This is very unsafe .

Filed Sep 4, 2025 · Electrical · 300,000 miles · LA

Odometer Fraud. The contact purchased a 2020 Jeep Gladiator. The contact discovered a mileage discrepancy after the purchase. The check engine light was illuminated. While detailing and deep cleaning the vehicle, the contact located a letter with the mileage. The contact sent an email and called the local dealer, but the dealer failed to respond. The vehicle was a dealer sale. At the time of purchase, the vehicle mileage was 50,000. It was later discovered that the mileage on the Title was 300,000.

Filed Aug 21, 2025 · Engine · WA

I was never notified of Recall Y68 for my vehicle by Jeep or FCA, despite federal requirements that recall notices be sent by mail or electronic communication. I only became aware of the recall after my independent mechanic (Jay’s Auto Care, Kirkland WA) diagnosed a cylinder misfire and confirmed engine damage, and advised me to take the vehicle to Jeep. On June 26, 2025, I brought the vehicle to Rairdon’s Dodge Chrysler Jeep of Kirkland and reported the misfire, with documentation from my mechanic confirming engine damage. While the dealer performed the PCM update under Recall Y68, they refused to address the misfire and instructed me to wait until the check engine light returned before they would act further. On [XXX], when the fault reappeared, I returned immediately to the dealer. I was then told the repair would not be covered due to the time elapsed since my first visit. Jeep corporate was contacted (Case #[XXX]) but has failed to provide any resolution or even respond to my written request. As of August 2025, Jeep’s lack of recall notification, the dealer’s refusal to address a documented engine defect, and Jeep’s non-response have forced me to purchase and install a replacement engine at my own expense through my independent mechanic. Safety Concern: •The vehicle suffered continued drivability issues while waiting for Jeep’s required “re-trigger,” risking further engine damage. •Driving with a compromised engine presents safety hazards, including sudden stalling or loss of power. •Jeep’s failure to notify me of the recall and subsequent refusal to address the misfire left me with no safe or reasonable alternative. Requested Outcome: I am requesting the federal safety agency’s assistance in ensuring Jeep/FCA: 1.Properly documents whether notification for Recall Y68 was ever sent to me. 2.Provides reimbursement or goodwill coverage for the cost of the replacement engine and labor. 3.Reviews whether dealer handling of this recall complied with FCA/Fed recall INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (

Filed Jul 10, 2025 · Electrical · WV

The instrument panel cluster went out. I have no access to check engine lights, warnings, gas information, mileage, tire pressure or any critical information I need to drive safely.

Filed May 29, 2025 · Engine · TX

Driving down the highway at normal rate of speed, the engine light came on and then started blinking and I loss power in the engine. After about 10-15 seconds, the engine light went off and the engine regained power. A few minutes later, the same thing occurred. In the mornings when the engine was cold, the engine would sputter when idling and the check engine light would come on. The dealership mechanics found the problem to be the cam shaft lobe being scored causing piston #5 to misfire. The dealership told me that there are 12,000 backlogged requests for this part. In other words, there is a known defect in the cam shaft. The price of repair is over $4000. This needs to be a mandatory recall by the manufacturer!! 12,000 back logged requests for this part? Really? This is a safet issues because of the engine power loss while driving down the highway. My truck was in the shop at the dealership for 41 days. Ridiculous.

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 5, 2025 · Electrical · NY

Instrument cluster has failed at random. No blown fuses etc. no misuse or incidents. Instrument cluster working as normal when started at driven at days start. Started vehicle for second time same day to depart location and instrument cluster completely black and not working. This issue has not fixed itself over time, and is not linked to any other issue causing such. Issue also has not been resolved as a new cluster is almost $500. Instrument cluster not functioning makes it very unsafe to drive as well as makes it impossible to see or find any vital information pertaining to the vehicles health and performance. I can no longer access fuel levels, engine/oil/transmission/etc. temperatures. Oil life, as well as not being able to reset oil life when/if oil is changed. With this issue I can not even see if check engine light is on or if receiving important safety message from vehicle. Also cannot see if vehicle is in 2H 4H N or 4L via dash. As well, but NOT limited to, I also cannot even access vehicles current mileage, and cannot even see battery voltage. My vehicle also is in desperate need of new tires, but because of this issue I cannot even replace them properly as I need cluster screen to make sure the accurate, proper and PRECISE tire size is imputed to vehicle to not affect vehicles performance and most importantly health. It’s ridiculous that their is currently a recall for such exact part, but only certain gladiators are supposedly “affected”. Yet, here I am, with a 2020 Rubicon Jeep Gladiator that has the EXACT issue and am being told my vehicle is not part of such recall.