2025 Ram 1500: misfire or rough idle

Filed Oct 27, 2026 · Brakes, Driver assistance · FL

The front sensor misfire a code. The fake code triggers all brake system lights. Causing a serious safety issue.

Filed Sep 21, 2026 · Engine, Fuel system · MO

2025 Ram 1500 experiences complete engine stalling at low RPM while coasting to stops. First and only owner since June 20, 2025. Vehicle properly maintained. INCIDENTS: August 28, 2026 - stalled twice (12:30 PM at stop sign, 3:30 PM at stop light). Both times coasting with no throttle/brake input. Check engine light appeared. September 17, 2026 - Critical safety incident: Vehicle stalled while releasing brake at stop sign merging with Highway 50 eastbound (50 MPH traffic). Complete loss of power steering and brakes during highway merge. REPAIR ATTEMPTS FAILED: Dropped off September 3, returned September 10 after PCM software update. Stalling returned. Returned September 16-17 for ignition control module update. Vehicle stalled in dealership parking lot same day. Two repair attempts in two weeks - both unsuccessful. DIAGNOSTIC CODES: P0300, P0301, P0302, P0303 (cylinder misfires). Codes persist after both repairs, indicating root cause in ignition/fuel delivery system that software updates cannot fix. SAFETY HAZARD: Vehicle shuts off without warning while operating. Loss of steering/brakes during highway merge created imminent collision risk. Vehicle currently unsafe to drive. REQUEST: Investigate systematic manufacturing/design defect in low RPM stalling condition. Multiple failed repairs and diagnostic codes indicate this is not isolated component failure. Vehicle has defect despite 14 months proper maintenance by first owner. Vehicle also has issues with radio and backup system. Parts on order with no delivery date or repair date.

Filed Aug 15, 2026 · Electrical · MI

On October 12, 2025, while on the highway, the CEL started blinking and the truck began misfire and shutter. I was able to get to the side of the road where I discovered the truck would idle but would barely move. It was towed to the closest dealership where they attempted to reflash the PCM and ISCM which is associated with Stellantis TSB 08-31025 REV. B. The PCM was flashed but the ISCM needed to be replaced. This was successful for another 9,484 miles where the issue repeated which, I will create another incident for.

Filed Jul 24, 2026 · Engine, Fuel system · WI

I purchased a new 2025 Ram 1500. Within the first week of ownership, the vehicle developed repeated engine misfires, check engine lights, and electrical issues, including a dead battery. The vehicle was repaired multiple times under warranty. The engine later suffered an internal failure that required complete engine replacement. After the engine replacement, the vehicle developed a new drivability problem. The truck now consistently shudders and hesitates during light acceleration and while maintaining a steady speed. The RPM has fluctuated unexpectedly, and the vehicle feels as though it is being fuel starved. This occurs without a check engine light. The dealership’s technician reproduced the condition during a test drive and confirmed the shudder. Stellantis technical support instructed the dealership to replace the mass airflow sensor as the first step in diagnosis but advised that they do not know whether this will correct the problem. I am concerned that the hesitation and shuddering could affect the vehicle’s ability to accelerate safely when merging into traffic, crossing intersections, or passing other vehicles. The vehicle has been out of service for an extended period while diagnosis and repairs continue.

Filed Jul 23, 2026 · Electrical, Lights · 5,000 miles · NV

The contact owns a 2025 Ram 1500. The contact stated that while attempting to start the vehicle, the vehicle failed to start as intended. The contact became aware that the check engine warning light was illuminated. The contact stated that the vehicle failed to start while using the key fob. The contact manually restarted the vehicle. The vehicle was taken to the dealer, where the failure was diagnosed with a misfire at cold start. The contact was informed that the part to repair the vehicle was unavailable. The vehicle was not repaired; however, the computer was reset. The vehicle was released to the contact. The contact stated that while driving at an undisclosed speed, the instrument cluster went blank. The blind spot light failed to function as intended. In addition, the driver's side rear view mirror failed to adjust as intended. The contact received notification of the federal safety agency Campaign Number: 26V059000 (Exterior Lighting, Electrical System). The contact was informed that the parts would be unavailable for the next six months. The manufacturer was made aware of the failure. The failure mileage was approximately 5,000.

Filed Jul 7, 2026 · Engine · 5,846 miles · WA

The contact owns a 2025 Ram 1500. The contact stated that the engine experienced misfires during cold starts. The check engine warning light was illuminated. The vehicle was taken to a local dealer on three separate occasions, where diagnostic trouble code: P0300 was retrieved, indicating random or multiple cylinder misfires. The dealer advised that no repair was currently available, and the vehicle was not repaired.The dealer referred the contact to the manufacturer. The manufacturer was contacted but provided no assistance and referred the contact to the warranty company. Additionally, the manufacturer stated that the federal safety agency was responsible for repairing the vehicle and directed the contact to the federal safety agency Hotline for assistance. The failure mileage was approximately 5,846.

Filed Jun 16, 2026 · Engine, Fuel system · AL

The engine bucks, stalls and misfires. It is a safety problem as it can stall when pulling out into traffic.The problem has been reproduced by the general manager (Tony Coogle) at Sandy Sansing Ram dealer in [XXX]. Yes, the vehicle has been checked by the dealer three times. No, there are now warning lights. The problem first appeared right after I purchased it in August 2025. Since then I have taken the truck in 3 times for repair and each time the dealer has claimed a fix, but the problem continues. Called Stellantis Customer Service( case #XXX) 5 times and they just keep telling me to take it back to the dealer. The dealer has already had my truck a sum total of about 2+ weeks and no fix. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Filed Mar 13, 2026 · Engine, Fuel system · OH

Misfire code check engine light on now once before only 4000 miles insturment panel went black odometer will flash one day the locks would not work Help

Filed Feb 25, 2026 · Engine, Fuel system · MD

There have been systemic cylinder misfires (each cylinder), anomalous electrical architecture behavior, and transmission calibration irregularities. The check engine light indicated multiple cylinder misfires, which I understand from the dealer is a common issue with the 2025 model. As the driver, there are a few major issues: Chassis Vibration-pronounced shaking or shuddering transmitted through the steering wheel and seat, particularly during the first engine start of the day or idling. Idle Instability-An erratic or surging idle, where the tachometer needle fluctuates noticeably without any throttle input. Throttle Hesitation-A distinct stumble, lethargy, or loss of power when attempting to accelerate from a stop or while merging. It also requires more energy to accelerate, and stops faster. This problem has been addressed at three (3) CDJR dealerships now, and is still ongoing. The car only has 26k miles on it.

Filed Sep 15, 2025 · Engine · 1,200 miles · SC

The contact owns a 2025 Ram 1500. The contact stated that the check engine warning light was illuminated at start-up. The contact stated that the following day, the vehicle was taken to a dealer and was diagnosed with several cylinder misfires. An unknown repair was performed; however, the check engine warning light returned the following day. The vehicle was taken back to the dealer, and the contact was informed that there was a misfire in cylinder#2. The contact was informed that the mechanic had replaced the spark plugs and ignition coil in cylinder#2 and cleaned the fuel injector; however, the check engine warning light remained. The contact was initially informed that further diagnostic tests needed to be performed and that a loaner vehicle could not be provided. Approximately 30 minutes after the loaner vehicle request was denied, the contact was informed that the vehicle had been repaired, and the vehicle was returned to the contact. The following day, upon starting the vehicle, there was gasoline pouring from the engine. The dealer was notified of the failure, and the contact was given a number to have the vehicle towed to the dealer. The manufacturer was notified of the failure, and the contact was provided a case number. The vehicle was towed back to the dealer and remained with the dealer. The vehicle was not repaired. The failure mileage was approximately 1,200.

Filed Jun 10, 2025 · Transmission · 487 miles · VA

The contact owns a 2025 Ram 1500. The contact stated while driving at an undisclosed speed, the engine warning light illuminated. The contact stated that the failure occurred six days after the vehicle was purchased. The vehicle was taken to the dealer where it was diagnosed with multi-engine misfire, DTC: P0300. The contact was informed that a software update was needed. The vehicle was repaired. In addition, the contact stated the software had been updated twice; however, the contact was informed that the software update was a temporary fix. The contact stated that the failure reoccurred. The contact stated that while driving at an undisclosed speed, the accelerator pedal was depressed; however, the vehicle failed to accelerate as intended. The dealer declined to update the software another time. Additionally, the dealer declined to buy back the vehicle. The manufacturer was made aware of the failure and a case was filed. The failure mileage was approximately 487.

Filed May 30, 2025 · Engine · AR

Multiple cylinder misfire, code has popped up multiple times. Already had fuel sensor replaced one month after purchase.