2021 Ram 1500: adaptive cruise control problems

Filed Oct 4, 2025 · Brakes · MN

I am receiving a check electronic brake system alert. I can no longer use cruise control, traction control or four wheel drive.

Filed Apr 29, 2025 · Acceleration, Driver assistance · MO

While driving on the highway with cruise control engaged, the system became stuck and would not disengage. I attempted to cancel cruise control using the button, tap the brakes, and shift to neutral, but none of these actions worked immediately. The truck continued accelerating beyond the set speed, putting my life and the lives of others in serious danger. I eventually regained control after repeatedly braking and forcing the truck into neutral, but this was an extremely dangerous situation that could have resulted in a fatal crash. To my knowledge, there were no warning lights or messages before or during the incident. I have not had the problem confirmed by a dealer yet, but I contacted the manufacturer (RAM customer service), and they instructed me to take the vehicle to a dealership for diagnostics at my own expense. This appears to be a serious defect in the cruise control or throttle system, and I am requesting a formal investigation.

Filed Jan 16, 2025 · Electrical, Engine · VA

I was driving and my vehicle make a dinging sound, all the lights on the dash came on and the truck started accelerating on its own. I did not have the cruise control nor was I pressing the accelerator and the truck was accelerating by itself. If i used the brakes the truck would slow down, but when I released the brakes the truck would self accelerate again. If I turned the truck completely off and back on it went away for a couple days but then happened again. This was a super dangerous situation as it was happening suddenly and without warning and I could have easily struck another vehicle or a pedestrian or lost control of my vehicle and wrecked. The issue happened out of no where on its own, was not triggered by anything and could easily cause serious harm to others if this happens to them. The issue has been confirmed and repair by Safford Dodge of Fredericksburg VA. (See attached service invoices) They deemed it a failed connection for acceleration pedal. They replaced it and there has not been an issue since. All of the warning lights and service lights on the dash became lit when this issue started happening.

Filed Oct 19, 2024 · Acceleration, Brakes · MI

I have experienced the engine surging while driving 2 times in the last 3 months. 10/18/2024. The RPMs slowly increase regardless of taking my foot off the gas pedal, slowing, or coming to a stop. The engine remains to rev. It causes me to have an extremely hard time keeping a maintained speed and gets difficult to slow down or slow to a stop. The truck was not on Cruise control, it was in 2-wheel drive, and the issue started right as I took off. The engine can be heard revving and trying to accelerate even in an attempt to try neutral with the foot off the gas to resolve the issue. I ensure I do not have my foot on the gas pedal and have to push my brake to the ground to stop. I have called our dealership who reports they are unaware of the issue I describe. Putting the car in park does not resolve the revving, which can be heard, and the Rpms fluctuations seen increasing stuck between 5-7. I have to completely stop and turn off the engine. I had pulled out and drove down a busy intersection I could not pull off on. The engine acceleration issue event lasted for about 10 minutes before I could safely pull off to turn the truck off. It was terrifying. If I had to suddenly stop I would of crashed. What? How many

Filed Feb 14, 2022 · Acceleration, Driver assistance · ID

Driving down the freeway using adaptive cruise control it was working very well, a car pulled in front of me and my truck slowed down. The car in front shortly after moved out of the way from in front of me. My truck immediately started accelerating hard to get back up to the initial speed. Traffic had come to a sudden stop in front of me but my truck continued to accelerate hard towards the now stationary traffic. I had to slam on my brakes and dive onto the shoulder else I would have wrecked. A similar situation happened a few days later when approaching a traffic light there was a car already stopped at the light. I had a car in front of me which was braking, my truck correctly slowed down. Just before coming to a stop the car in front switched lanes, my truck then punched it as if trying to get back up to the initial speed with a stationary car less than 2 car lengths in front of my I had to slam on the brakes else I would have slammed into the back of the stationary car.