2019 Jeep Wrangler: check engine light

Filed Sep 24, 2026 · Transmission · NY

The 48-Volt Lithium-Ion eTorque Hybrid Battery Pack (Mopar Power Pack Unit/PPU) on my 2019 Jeep Wrangler Sahara Unlimited (~55K miles) failed. The failed component may be available on video by the dealership. Check engine light first appeared early XXX. Earliest dealership appointment was late August 2026. At that visit, dealer diagnosed DTCs P0A94 (recurring, including P0A94-03) and U0412, and performed a software update flashing the BPCM (Battery Pack Control Module) firmware from 05057870AN to 05057870AV per a Technical Service Bulletin. This was covered under warranty at no charge; vehicle was returned to me. Days later, the check engine light returned along with a battery warning light and additional indicators, including ABS among others I could not fully identify. The vehicle then lost power and stopped running while in the roadway, disabled in an active lane of travel — a safety hazard to myself and surrounding traffic. Vehicle was towed to the dealership XXX. On this second visit, the dealership attributed the failure to moisture exposure and corrosion at the PPU connector/harness, denied warranty coverage, and charged me $4,561.90. I received the repaired vehicle XXX. I opened a case with Stellantis Customer Care (Case #XXX) with case manager [XXX] to request a technical review of the failure and the warranty denial. [XXX] stated he contacted the dealership five times seeking information or resolution and received no response. He offered rental car reimbursement up to $50/day during the repair. Dealership diagnosed and repaired the vehicle on both occasions. No known inspection by manufacturer, police, or insurance beyond the review requested under Stellantis case #XXX. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Filed Aug 18, 2026 · Brakes, Electrical · TN

Check engine, ABS, Service Shifter suddenly pops up and the steering was hard to turn almost had an accident

Filed Jul 22, 2026 · Brakes, Engine · 68,482 miles · WA

The contact owns a 2019 Jeep Wrangler. The contact stated that while driving approximately 60 MPH, the vehicle suddenly lost motive power and stalled, and the vehicle went into LIMP Mode. The check engine warning light was illuminated. The driver was able to safely move the vehicle to the side of the road. The vehicle was taken to an independent mechanic to be diagnosed, and the contact was informed that the ABS module had failed. The local dealer was contacted and advised that the replacement part was on backorder and referred the contact to the manufacturer for assistance. The vehicle was not diagnosed or repaired. The manufacturer was contacted and confirmed that the replacement part was not available. The failure mileage was approximately 68,482.

Filed Jun 17, 2026 · Engine · 65,000 miles · FL · fire

The contact owns a 2019 Jeep Wrangler. The contact stated that while driving at an undisclosed speed, the Check Engine warning light illuminated. The vehicle was taken to O'Reily's, where a portable diagnostic machine was used; however, no fault codes were retrieved. The contact stated that the check engine warning light was an old warning light. In addition, the contact was informed that the vehicle could be driven. The contact stated that while driving to the residence, the check engine warning light turned off. The failure reoccurred, and the engine seized. The contact stated that the vehicle rolled near the shoulder of the road. The contact became aware of smoke coming from the engine compartment. The contact stated that a good Samaritan stopped and assisted the contact. The contact and a good Samaritan became aware of fire coming from the engine compartment near the battery. The good Samaritan attempted to extinguish the fire with a sweatshirt, then used a jug of water from inside the vehicle. No injuries were sustained. The vehicle was towed to the local tow yard. The Carvana dealer where the vehicle was purchased was made aware of the failure. The vehicle was then towed to a repair shop assigned by Carvana. The vehicle was not diagnosed or repaired. The manufacturer was not made aware of the failure. The failure mileage was approximately 65,000.

Filed May 5, 2026 · Electrical, Steering · DE

What component or system failed or malfunctioned, and is it available for inspection upon request? After diagnostics of multiple 'no communication' codes, it was determined that the CAN buss star connector was faulty. The part has been replaced, but is available for inspection. How was your safety or the safety of others put at risk? The malfunction caused repeated warning lights and loss of steering at unpredictable times. Luckily I was always able to put on my hazard lights and get out of the path of traffic. Has the problem been reproduced or confirmed by a dealer or independent service center? Yes Has the vehicle or component been inspected by the manufacturer, police, insurance representatives or others? No Were there any warning lamps, messages or other symptoms of the problem prior to the failure, and when did they first appear? Yes, a variety of warning lamps and messages over a period of 10-12 days, which would disappear after restarting the vehicle (restarting was necessary to get the steering working again). Messages such as traction control, auto on/off, and check engine light were a few different ones. They came and went so quickly it was hard to catch them all while I was focused on getting safely off the road.

Filed Apr 19, 2026 · Electrical, Engine · MS · fire

I was driving my 2019 Jeep Wrangler Unlimited Sahara 2.0T/AT to the gym with my spouse. No Check Engine Light, Jeep Temps were perfect. All gauges operated as it should, so there was no sign of trouble. The vehicle was OFF. We parked and walked into the gym and then into the 1 set of exercises, Someone yelled in the gym that someone's truck was on fire. We ran outside and Lo and Behold it was our Jeep. The Engine Compartment Was totally Destroyed. Please Look At the Pictures for Reference.

Filed Mar 13, 2026 · Driver assistance, Electrical · MN

Engine lights on Glass Recalibration failed multiple times. Engine failure when Jeep comes to a complete stop vehicle totally shuts down and needs to be restarted. When manufacture was contacted: not able to sell new engine. Resolution used engine with same issue. No real Resolution.

Filed Feb 9, 2026 · IN

around august of 2025 the gauge cluster went black and i can no longer see my total miles, gas gauge, and any warning lights that may appear on screen i.e. door ajar. because of this, i have almost gotten in car accidents because my gas runs out unknowingly. one time it put me in serious danger on the interstate having to add gas while cars were flying past me. there were no warning lights, check engine lights, or any other lights that would suggest failure. it just went black one day random day. we recently got into a car accident, this occurred after it had gone out and upon inspection the mechanic confirmed it was not associated with the accident and suggested looking into recall because jeep currently has recalls on gauge clusters, which is why i am reporting now. it is available for inspection upon request.

Filed Aug 19, 2025 · Electrical, Steering · WA

I drove over a rough patch/bump in the road. A ton of warning messages and failure lights activated on the dash. In addition to the check engine light, there were warnings for electronic stability protection, sway bar disconnect, ABS failure, power steering failure, shift lever malfunction. In addition to these malfunctions a failures, the windshield wipers turned on un-commanded and the radiator fan went into the highest possible speed, the digital engine temperature gauge failed, and both the digital and analog speedometers failed. This happened on a arterial road, losing power steering and braking at ~30mph unexpectedly was a shock, but manageable. At highway speeds it likely would have led to an accident or collision. Unfortunately, I don't have any documentation of the failure lights and systems failing, but it had happened several times prior to this occurrence, albeit only with dash warning lights, no actual system failures. After the system failures, I stopped driving the vehicle. The problem appears to be somewhat widespread and is caused by a failing CAN-C BUS. A quick google search will reveal NUMEROUS descriptions on the same dangerous issue. This thread seems to clearly expIain the root of the issue with the CAN-C BUS: [XXX] I replaced my old CAN-C BUS (p/n 68321746AA) with a new part and it appears to have resolved the issue. I have saved the old CAN-C BUS for inspection if the federal safety agency is interested. It looks exactly like the failed BUS in the linked reddit thread above. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Filed Jul 13, 2025 · Electrical · MO

I was driving my 2019 Jeep Wrangler to work and my Jeep started throwing all the things on the dash, Start/Stop lost communication, ABS System lost communication, plus several other issues and I went into limp mode. I had it towed to the dealership to find out what was wrong and they told me it was the ABS Module. That was on Wednesday June 11th, 2025. It was 3 weeks before they got the part. When they went to program the ABS Module, it froze up and they had to order another one that took a week to get in. They replaced it again and told me, it was fixed. I picked it up on Wednesday, July 8th, around 5:00 pm and on that Friday, July 11th, at noon my check engine light came on again. I’m taking it in tomorrow to see what it is this time. So far it’s just the check engine light and I’m praying it don’t quit on me getting it there. There should definately be a recall on the ABS Module. I’ll be writing another update after I see what’s going on tomorrow.

Filed Jul 11, 2025 · Electrical, Transmission · 66,201 miles · OR

The contact owns a 2019 Jeep Wrangler. The contact stated that upon starting the vehicle, the message "Service Shifter" was displayed and several unknown warning lights were illuminated. The contact stated that upon turning off and restarting the vehicle, only the check engine warning light remained illuminated. Additionally, the contact stated while driving on a back road at 25 MPH, the windshield wipers engaged independently, and the power steering became inoperable. Several unknown warning lights were illuminated. The contact immediately pulled over, and the vehicle was towed to a local independent mechanic, where the failure could not be duplicated. The local dealer was contacted but the vehicle was not diagnosed or repaired. The contact was advised that the VIN was not included in a recall. The manufacturer was notified of the failure. The failure mileage was approximately 66,201.

Filed Jul 10, 2025 · Electrical, Engine · 49,700 miles · MN

The contact owns a 2019 Jeep Wrangler. The contact stated while driving 20 MPH, the vehicle stalled. The contact stated that the vehicle was restarted. The contact continued to drive, but the power steering became inoperable. The contact stated that the vehicle became extremely hot, and the cells popped and damaged the battery. The contact stated that the check engine, power steering, and battery warning lights were illuminated. The vehicle was towed to the residence. The contact called the local dealer, but the vehicle was not diagnosed or repaired. The manufacturer was contacted, but no additional assistance was provided. The failure mileage was approximately 49,700.