2021 RAM PROMASTER Lane Departure Problems

I had to replace my backup camera as it was faulty and the newer models had a recall. My blind spot monitoring system cuts off randomly going down the road. We have paid out of pocket for a new camera and the dealership can't figure out why the blind spot indicator cuts off.

The blind spot monitoring function frequently disables while driving this vehicle. This occurs more often during warmer weather and in my case only seems to happen when the brakes are applied. For a few minutes after each "blind spot disabled" warning, you cannot reset the blind spot alert function through the touchscreen system. This is a safety issue because you often don't notice that the blind spot alert is disabled and expect to see or hear the blind spot warning when driving if an approaching vehicle is in your blind spot. This issue seems to primarily affect 2021 Ram Promaster vans. There are many posts in the ram promaster online forum about it @ [XXX] . My dealer connected my promaster to their computer just after the disable warning and there was no indication that it had happened--even though you could visually see that the blind spot monitor was off in the vehicle touchscreen monitor. They kept the vehicle for an afternoon and could not determine what was causing this malfunction. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

blind spot alert disables itself. had vehicle back to dodge dealer three times . dealer resets but blind spot disables itself ,sometime it is ok for days sometimes only hours very random.very dangerous, and unreliable almost had accident .

Blind Spot Detection (BSD) goes off randomly when driving. Not having the BSD on obviously makes the driver more likely to change lanes into another vehicle. In addition, when it goes off an alert sound and text scrolls on the dash, distracting the driver for several second. In addition, it takes the driver's eyes off the road to turn it back on (have to go through several pages to get to the BSD option). There are multiple PromasterForum complaints about this (many people are having this problem) - two solutions have been identified, but RAM has not acknowledged the problem. The shortest form is https://www.promasterforum.com/threads/blind-spot-detection-shutting-down-while-driving.95972/

Blind spot warning randomly disables itself and has to be enabled again through the control panel.

Blind spot monitor system was disabled until recently since I purchased the 2022 Jayco Swift January 2022. Went to local Dodge dealer on July 11, 2022 to have them look at the Blind spot monitor and other items, see attached document item #3. I then learned from the Dodge Promaster Forum that many other owners had the same problem with the blind spot monitor would get disabled while driving with Promaster vans going back to 2016 at least. The Dodge technician could not diagnose the problem due to the original radio being replaced by the Jayco RV company, he could not see the signal from the computer to the blind spot sensors see note in item #3 from Rainier Dodge. I took the RV into the dealership that I purchased the RV from Valley RV Supercenter in Kent, WA on August 17, 2022. The technician there showed me how to activate the blind spot monitor system through the installed radio, but we were not able to verify it was working in the deal's lot. So it was agreed that I would verify that it was working on the drive home. Got on the road and it was working great, but while driving south on I-5 I hit some traffic and while driving in traffic I witnessed the system turning itself off in heavy traffic when it was most important to have it on. It made making lane changes in traffic more difficult and more dangerous. Could not turn on the system again while the vehicle was moving. I believe that repeated hitting the brakes turned the system off. I had to pull off the interstate and stop to turn on the blind spot monitor again. When I called the dealership and explained what had happened they told me I had to take it back to the Dodge dealership for them to look at it again.

The Blind Spot Monitor turns itself off spontaneously. Complained to dealer for 18 months but they were unable to replicate. I finally realized I could lock in the "fault" if the headlights were left ON. Mechanic was able to determine the vehicle thought there was a trailer attached which disconnects the monitor intentionally. Cause could not be determined but a lighting module was replaced as it was their best guess. It has not reoccurred since and may have been resolved but I am reporting this as many owners of '21 Promasters have reported the same issue on a model specific forum.

Blind Spot Warning disables many times over an hour. Most obvious seemed to be related to braking.

We took the van on a trip out West in May 2022. During that time the Blind Spot Monitoring System would randomly shut off during our travels. It was random. Would happen a few time one day and none the next day. There were no warnings but the system alarm would ring when blind spot was disabled. I just had neck surgery and relied on the system during heavy traffic.

Blind Spot System constantly disables while driving under varied circumstances.

The blind spot detection system randomly turns itself off. The problem is the van is quite large with lots of blind spots, and you think the system is working because you have it turned on and it turns off by itself. Chrystler is not concerned with the problem, nor do they have a fix for it. This a safety concern that needs an immediate fix. The potential for loss of life is extremely high with this defect.

The contact owns a 2021 Ram Promaster 1500. The contact stated that while driving at various speeds, the blind spot monitoring system was not working properly. The system continued to play an audible chime. The system was registering that vehicles were nearby even though there was none. The contact spoke with an unknown local dealer but, the vehicle was not diagnosed or repaired. The manufacturer was not contacted. The failure mileage was approximately 300.

Mileage: 300

Since brand new, blind spot monitoring system would turn itself off repeatedly after being turned on. I cannot replicate how or why it occurs and it has happened at various highway and lower speeds.

The Blind Spot Detector is not working. The van can be inspected upon request. This is a large vehicle and blind spot detection is an extremely important safety feature. A Dodge dealer found the following stored codes: U1700-87, c100B29, and c100e29 - I don't know if these are blind spot sensor codes or not. They have indicated they do not know how to fix it. This van is a Ram ProMaster 3500 that Jayco has converted to a class B RV (Jayco Swift T). It has not been inspected by Jayco or any others. The message center in the dash indicates the Blind Spot Detector is Disabled each time the van is started. This has appeared from the time of purchase of the van in early July. It continues to this day.