Acceleration & cruise control
21 complaints filed with NHTSA about the Ram Promaster's acceleration & cruise control. Unintended acceleration, surging, throttle problems and cruise or adaptive cruise faults.
Chrysler Group LLC (Chrysler) is recalling certain model year 2014 Ram ProMaster vehicles manufactured July 1, 2013, through December 10, 2013. In the affected vehicles, if the accelerator pedal is pushed downward at a certain angle, the pedal may get stuck...
12/2020 First the TPS sensor failed at 1,000 miles and almost caused an accident. Would not go over 25mph, was shifting hard, and the service engine light was on. Verified and replaced at dealership. Second, the rear view camera stopped working while backing up and almost caused an accident - no back windows - major safety issue. Replaced by me as they have no replacement for it even though its under recall. No warnings. Third, the transmission was shifting hard and fell out while I was driving on the freeway...
at 55,000. Damaged transmission and crankshaft and joints. Verified and replaced at dealership. No warnings, no lights Fourth, the transmission bolt was found loose, hard shifts, and has an internal breakdown at 71,000 miles. Verified first by independent shop - they tightened the bolt for me and is now sitting at the dealership waiting on another transmission that has been verified and approved under warranty. No warnings, no lights
ESC fault codes came on. Brake light switch intermittently not activating causing vehicle to set ESC fault.
While cruising at highway speed with adaptive cruise control enabled, the vehicle will incorrectly detect traffic/speed signs and will rapidly decelerate on a highway in traffic. I believe that the message that displays after detecting the new speed limit (improperly based on a sign other than a highway speed limit sign) without giving the option to reject using the "resume" button before. There is an option to disable traffic/speed sign detection, but that must be manually disabled in software every time the...
vehicle is re-started. Adjustment of the speed during adaptive cruise control based on traffic/speed signs should be disabled for safety. It's fine to have the speed limit displayed on the dash, but dangerous to have the vehicle adjust speed on its own without sufficient warning, or at all. I would like to request that RAM be directed to disable the software connection between traffic/speed sign detection and the adaptive cruise control so that, just like regular cruise control, the operator chooses the vehicle's speed. Note that this issue has happened many times since I've owned the vehicle, which was purchased as new, but I am now complaining to NHTSA because I experienced multiple incidents on my most recent trip that might have risked a rear-end collision from a vehicle following me when deceleration occurred.
When driving on a freeway or highway, without cruise control on, & the pavement surface changes color &/or texture (eg: going onto a bridge/overpass) the vehicle will decelerate quickly & without us pressing the brakes. All the systems were checked by Dodge Ram & were showing no errors with software etc, as we thought this was traction control not working properly due to a software problem etc.
While driving on a straight highway, no wind, no weather, 65 mph, both hands on wheel, the van started revving and lost power. I pulled over with engine still running. There were no codes or warning light. I tried to drive again. It continued to rev and not get up to speed. I pulled over again and shut it down. I waited a few minutes and then started it. When pulling back on freeway it ran normal with no more issues for another 700 miles. I took it in to the Dodge dealer on 1-13-23 to have it checked. They couldn't find anything. I'm reporting this because it was a very scary and dangerous incident. I was lucky to have a place to pull over and not be in heavy traffic.
When using Adaptive Cruise Control (ACC) with Traffic Sigh Assist (TSA) engaged (the default) on an interstate or other high speed road - for example the current highway speed limit is 65 and the ACC maximum speed is also set at 65 MPH, the TSA (wrongly) detects a much lower speed limit, say 25 MPH, the system flashes a warning AND AUTOMATICALLY APPLIES THE BRAKES without allowing the driver to respond to the warning message. According to the user manual, what is supposed to happen, is that the TSA warning...
message displayed on the dash says "new speed limit detected" and SUGGESTS that the driver can accept the detected speed limit as the new ACC maximum speed by pressing the RES resume button on the the steering wheel. If the driver does not respond, the ACC max speed stays as set. This is seriously dangerous! imagine going 65 MPH in heavy traffic and suddenly, unexpectedly the brakes are applied so violently that the vehicle skids and swerves out of its lane. This has happened multiple times to me. I believe this is caused by 2 problems: 1 The TSA wrongly detects a significantly lower speed limit sign. I don't know for sure but I guess it might "see" a sign on an exit ramp or parallel service road. 2 The vehicle automatically sets the new TSA speed as the ACC top speed and automatically applies the bakes instead of allowing the driver the option of setting the new speed limit by pressing the RES button. I have spent the last week trying to report this to the RAM dealer and Customer Care but they don't seem to be very responsive. They say I should schedule and pay for a diagnostic session but they have no openings until mid-January. Even if I took it in, I doubt the diagnostics would show anything because this is most likely a software issue. It would also be difficult to duplicate on local roads. I do know another person who has reported this same problem on YouTube and is able to recreate it as detecting a speed limit sign on a parallel service road.
The text coincides with this video I made. Here is its URL. https://youtu.be/hpA-Dw_-ihY This is my second time reporting this issue. My first report was comprised of just text. I was told that a video would be more helpful. The issue follows: Periodically when I have been using Adaptive Cruise Control the van will automatically, harshly apply the brakes in the middle of the highway. It took me a while to figure out what was happening. It has to do with Traffic Sign Assist which is enabled by default. When...
the van detects a speed limit sign that is at a speed limit slower than what I am traveling, a message appears on the dash that says "New Speed Limit Detected. Press "Res" to Reject" This is the opposite of the way the owners manual says Traffic Sign Assist should work. The owner's manual says when a new speed limit is detect the user will be given the OPTION to accept the new speed. The manual says, if the user does not accept the new speed the vehicle will continue as it was. It will not apply the brakes. The consequence of the way it is implemented in my van is that if you do not see the message (because your eyes on the road) the van will AUTOMATICALLY apply the brakes. I have had it happen when traveling 65 mph and encountered a 25 mph speed limit sign at an exit. It only occurs with white speed limit signs. A 45 MPH speed limit sign appears on a service road at time :16. Just as the speed limit passes out of my FOV the message appears on the dash and the brakes are applied when I do not press "Res" to reject the new speed limit sign. Each of the times it happened in this video, first when it encountered a 45 mph sign and later when it detected a 55 mph, I was not expecting it. If you zoom into the video, or the attached picture, you can see the message.
Is intelligent speed assist implemented backward in the new Ram Promaster 3500? I attached a screenshot of the owners manual page describing how it should be working. I have experience several instances of the van automatically slamming on the brakes when traveling down the highway when the van recognizes a 25 mph speed limit sign for an off ramp. I have not been the only one. There are other posts about similar situations on the Ram Promaster Facebook page. I have a 2023 Solis 59PX that is built on the (new)...
2022 Ram 3500 chassis. My Promaster happened to come with adaptive cruise control. This post is regarding the implementation of the intelligent speed assist feature which can automatically adjust the max speed of the van based on traffic signs it recognizes. The manual says that "the message in the instrument cluster display will indicate the new detected speed limit by suggesting the driver to press "RES" to accept it." Where the manual says the instrument panel prompts the user to press a button to accept the suggested speed, I recall my instrument panel requiring me to press a button to dismiss the accepted speed. If I didn't see the prompt to dismiss the new speed, I recall the van automatically changing speeds. I recall mine switching speed on several occasions, automatically, without having to press anything, which resulted in some dangerous moments when traveling 65 MPH on the highway and the van detecting a 25 MPH sign for an off-ramp and slamming on the brakes. I am wondering if it is implemented backward in my van. I recall it saying "dismiss" where the manual says it should say "accept". The manual describes the system working in a way that makes more sense to me and is opposite of the way I recall mine working. In the manual it describes the system making a suggestion to change based on the sign but requires user input to actually accept it. There are several posts about the same thing on the RamPromaster Facebook page.
Speedometer units and units used to set cruise control randomly change from MPH to km/h occasionally when the vehicle is started. No safety risk. Problem has occurred multiple times but dealer was not able to reproduce. There are no warning lamp associated with this issue.
E-Brake cable freezes or doesn't disengage causing damage to the rotors, brakes, pads. Dealership said that the e-brake cable had stretched causing the rear parking brake to lock and destroy the rotors, brake pads, shoes, wheel speed sensors, pad sensors. This issue was addressed while the vehicle was under manufacturer right before we purchased the vehicle. No action was taken due to no codes in the computer, which is related to a Technical Service Bulletin for this vehicle. The TSB number is 08-088-16. Dated...
November 15, 2016. The TSB requires the re-flashing of the computer. The vehicle AVG Mpg does not change from 4.7mpg. There are no VIN numbers on the TSB. It applies to vehicles that are having this issue. The safety issue with this is, the parking assist brakes do not work when this issue is present. This is a 2016 Dodge RAM ProMaster 2500 Diesel. There is no PARK. Only the PARKING ASSIST E-BRAKE.
I've only been taking it to the ram dealership to be fixed in may still have not got it fixed right one minute I could be doing 40 and then I nexen you know the rpms are up to 7 in the drop down in a jerk so hard to get into gear almost breaks my freaking neck then I will shift in I get up to 65 anything over 65 it starts jerkin and then drops back down and I can't get back started again I had to pull over the side of the road let everything cool lob doesn't make any sense to me already change the transmission...
cooling system the speed control him sensor I don't know what more I can do I am taking back to the dealership to see if they know what to do because apparently they don't in a light to know why the dealership cannot fix their properly
Tl* the contact owns a 2020 ram promaster. The contact stated that while driving at an unknown speed and making a left turn, the accelerator pedal fractured. The vehicle was towed to the dealer johnson auto plaza, inc (12420 e 136th ave, brighton, co 80601, (303)654-1940) where the accelerator pedal was inspected and repaired. The failure recurred a second time. The manufacturer was notified of the failure and informed the contact that the vin was not under recall. The contact was referred to nhtsa for assistance. The failure mileage was approximately 11,143. The vin was not provided.
We own a 2015 ram promasters. While driving on the freeway at various speeds. Tech experienced a sudden loss of power. On the dash appeared a yellow check engine light and a red symbol ( ! ). A message read "service required - transmission service". As the tech attempted to exit the freeway, afraid that the van might stall with incoming traffic. He made a safe exit off the freeway. Pulled over, turned off ignition and was able to restart the car in hopes that the trouble would clear. The red symbol ( ! ) Disappeared and power was restored. Was able to drive back to company
Heading southbound on hwy 37 the peddle fell off.. Vehicle decelerated and I steered to the right shoulder of the highway .. Lucky cause traffic was heavy and it was dark but glad it didn't get stuck in acceleration it stopped and didn't move again.. Thankful for the end result of this defect.
Experiences dangerous stalling and loss of electrical power to engine during driving. This can cause a serious accident. This is specifically a symptom of one of the many recalls supposedly performed on this vehicle already. I believe the recall repair previously was not completed properly because I have experienced this 10 times in the past two weeks.
Source: U.S. National Highway Traffic Safety Administration (NHTSA) complaints and recalls, checked daily. Complaints are owners' own reports and are not verified. How we use the data
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