2022 Ram Promaster Vehicle speed control Problems

“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. …”

“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.”

“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.”

“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. …”

“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. …”