Jeep Gladiator check engine light comes on

Filed Jul 14, 2026 · MO · fire

What happened: Driving on road, check engine light and traction control light appeared, smelled metallic-type odor, pulled over, before I could put it in park smoke started pouring from under the hood on passenger side. Unable to extinguish due to ball of flames hitting me as I opened hood. Burned it to the ground. Which component: I'm assuming it was the electric hydraulic power steering pump (EHPSP) wiring. The fire was on the passenger side. The vehicle is available for inspection in a tow lot near [XXX]. Safety: It caught fire on a small dirt road in the country. I was the only occupant and I was uninjured. There was nobody on the road at the time. Thankfully the woods got rain recently or it would have caused a massive forest fire. Problem reproduced: No Inspection: No one has inspected the car yet. Warning: There was no other warning other than described above and the truck was behaving perfectly normal. Other: The vehicle was taken to Tri-Lakes Ford in [XXX] to replace the high pressure fuel pump (another recall). They told me they didn't have the parts to fix the steering yet, so I planned on coming back when they did. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Filed Jul 11, 2026 · Driver assistance, Fuel system · NC

The vehicle was bought in CA and hasn't had any issues till about after 3-4 yrs later. 1) Adaptive cruise control / emergency braking system / forward collision notification will occassionally state "not availble/unavailable" or "visibility" is not available and to clean windshield, but the windshield is not dirty or obstructing the camera. 2) The fuel emission system has had several diagnostic codes referring to the gas gap or fuel sensors. Vehicle is boggs down/loses power and starts ideling roughly and acts like it wants to shutdown and has shutdown. I've had to get vehicle towed twice for this issue. Replaced gas gap and still had issues. Then they went away for a few months, but now I am getting a diagnotic code stating that the fuel tank gas sensor is causing the check engine light.

Filed Jun 11, 2026 · Transmission · LA

Engine light came on, vehicle went into limp mode. Transmission would not shift any higher than 3rd gear and kept slipping while on interstate! Was almost hit by several 18 wheelers! Jeep dealership said our vin is not part of the service bulletin but they did get the P0733 code! Make it make sense! I guess we’re supposed to get run over by 18 wheelers before they’ll fix it!

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 Apr 27, 2026 · Electrical · OR

Complete failure and shut down of all systems while driving through an intersection. Result found by dealer: Frayed wiring harness on right side of engine rubbing near exhaust parts. Known problem in several models of Jeep due to TBS issued to dealers. Jeep failed in intersection in [XXX] and was able to coast to curb. Started later and was able to drive it back to Prescott, AZ with fingers crossed, took to York Jeep dealer for repairs. They have the repair file. Was 6 mos out of warranty but only about 12k miles ref: Case Number: XXX Release Date: 1/16/2021 Symptom/Vehicle Issue: Check Engine Light On, Service Shifter Message, No Crank No Start. Transmission Wiring Harness Chaffed Or Pinched Near Exhaust DPF Discussion: Initial complaint is that the Check Engine Light is illuminated, Service Shifter Message is displayed, and/or a crank no start condition exists. Upon scanning the vehicle for DTC’s you may find one or more of the following: P2453, P2454, P0335, P0336, P242B, P242C, U0074, U11C3. Diagnosis: Inspect the wiring harness near connector XY230A leading down to the transmission. The harness routing may allow the wiring to make contact with the sharp edge of the DPF gasket flange. It has also been found that the wiring harness could be routed close to the exhaust causing chaffing. Both of these situations could result in damage to the harness and a potential open or short. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

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 Jan 25, 2026 · Transmission · GA

Check engine light came on and then shifter went into lock out mode while in drive with notice on dash to service shifter. Shifter will not shift out of park state without pulling service release for neutral.

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