Honda Ridgeline collision warning problems

Filed Oct 28, 2026 · Driver assistance, Electrical · HI

The component that failed is the starter motor assembly. It is currently installed in the vehicle and is available for inspection upon request. This failure creates a severe safety hazard by disabling critical Advanced Driver Assistance Systems (ADAS). When the vehicle's Auto Idle Stop feature engages at a stop and then attempts to restart the engine, the internally defective starter draws excessive current. This causes the vehicle's electrical system voltage to plummet to 9 Volts. This sudden low-voltage condition immediately triggers warning messages and disables the Collision Mitigation Braking System (CMBS) and the Forward Collision Warning system. My safety and the safety of others are put at immediate risk because the primary emergency automatic braking systems are deactivated during normal driving operation. The problem has been definitively reproduced and confirmed by an authorized Honda dealership. The manufacturer is aware of this defect and issued TSB 23-010 and a March 2023 Warranty Extension covering this exact issue. Initially, at the manufacturer's instruction, the authorized dealer performed a valve adjustment. However, on May 20, 2026, the dealership's technician officially documented on the repair order: "After repair battery voltage still dropping to 9V when restarting." Despite written confirmation from their own authorized dealership that the dangerous voltage drop and safety system failures persist, the manufacturer's District Parts & Service Manager denied the subsequent required starter motor replacement. The vehicle was fully inspected and diagnosed by the dealer, but the manufacturer refuses to complete the hardware repair, leaving the vehicle in an unsafe condition. The warning symptoms include a strained engine restart from an Auto Idle Stop event, immediately followed by CMBS and Forward Collision warning lamps illuminating on the dashboard

Filed Sep 24, 2026 · Driver assistance, Lights · AR

This 2025 Honda Ridgeline has an auto high beam function. When the headlights are on, the auto high beam will cycle on and off for absolutely no reason. Often only 3-5 seconds apart. There will be no oncoming traffic and no road signs illuminated by the headlights that would possibly confuse the system that a vehicle is approaching. ALSO, the forward collision warning system is way too sensitive. It will often either flash a brake warning on the dash, or actually activate the braking system when it is not needed. This occurs often when on a two lane road, slight curve and traffic approaches in the opposite lane.

Filed Sep 23, 2026 · Driver assistance · MO

On several occasions, my 2025 Honda Ridgeline has falsely activated the collision mitigation system. Once on a two lane road curving to the right, an oncoming vehicle activated the system resulting in a startling shaking of the steering wheel and dash warning light. I would say about 80 percent of activation has been false alarms in one way or another. This is a safety issue when this collision mitigation system activates unexpectedly, startling the driver. I worry this system may apply the brakes when unnecessary, but this has not happened to me. I have heard it happened to other Ridgeline owners.

Filed Aug 16, 2026 · Brakes, Driver assistance · PA

When driving normally, oncominng traffic is triggering the frontal collision warning system. Is some cases long enough to start the emergency braking procedure if I do not engage the brakes manually preventing the automatic emergency braking. This usually happens on curves in the road in typically right hand curves. This is happening on 2 lane roads at between 45 and 55 mph. Initiating and emergency braking at this speed could send my car into the oncoming traffic. I am concerned for my safety if I do not hit the brakes manually.

Filed Aug 4, 2026 · Driver assistance · CA

The vehicle's front-facing monocular camera experienced an internal component failure that triggered a permanent error code U3000-49. This hardware failure instantly disabled multiple core safety features simultaneously, including the Adaptive Cruise Control, Lane Keeping Assist (LKAS), Road Departure Mitigation, and Collision Mitigation Braking System (CMBS) ABS Braking and High Beam Support with all dash lights remaining on. The sudden, unexpected loss of automatic safety braking and driver-assist features while moving poses an immediate highway safety risk.

Filed Jul 23, 2026 · Driver assistance · FL

When driving the vehicle suddenly displayed warning and failure lights for the following: Adaptive Cruise Control, Lane Keep Assist, Road Departure, High Beam Support, and Collision Mitigation. The vehicle in the past regularly experiences issues with oncoming traffic (especially on 2 lane roads) when it comes to auto braking and forward crash warnings so I immediately brought the vehicle home as I was worried for my safety and the safety of others on the road that if these systems were now warning of malfunction the vehicle might auto brake in traffic for no reason and cause a crash. I took the vehicle in following this as I looked online and discovered there were multiple recalls on this vehicle for other various issues and I wanted the dealer to fix those in addition to determining if this was part of one of the recalls also. The dealership has diagnosed the issue as the forward multi-purpose camera and is stating it needs to be replaced to correct the safety issues of the vehicle. I reviewed online and found that just a coupe years ago this part was approx $800 and the dealer is not charging over $1600 for the part. The other issue is that I paid for the part and the dealer claims this part will not even ship until August 26 (over a month away). Additionally I have further researched this issue and found that it is a common failure on Honda and Acura vehicles and creates a major safety concern, yet Honda Motors has refused to address the issue and handle this as a recall as it should be done. New vehicles should not be regularly experiencing catastrophic safety system failures regularly and the manufacture not be held liable for the damages and not be able to fix the part or car in a timely manner. The fact the parts are in such short supply and backorder further attests to the common failure of this part. I would appreciate your immediate review and action of this matter to ensure that Honda is held accountable for the major safety failures they have created.

Filed Jul 18, 2026 · Driver assistance, Electrical · AZ

2020 Honda Ridgeline-Internal failure, multi purpose camera. Multiple lights on dashboard and codes associated with driving support system, Collision Mitigation, Braking System, Lane keeping assist system, Road departure mitigation, Transmission System error. All these are showing up because of the front camera going out due to overheating. Dealership quoted $1197.20 for replacement. Multiple safety violations making vehicle unsafe to drive. Extended warranty will not cover.

Filed Jul 14, 2026 · Driver assistance, Electrical · FL

My 2021 Honda Ridgeline Sport experienced failure of the forward-facing Honda Sensing camera system. This camera controls safety features including Collision Mitigation Braking, Lane Keeping Assist, and Adaptive Cruise Control. The failure disables safety assistance features. Honda acknowledged the issue but refused to provide full repair coverage and only offered $941 toward a repair costing significantly more. I believe a safety-related camera failure should be investigated as a potential defect

Filed May 20, 2026 · Driver assistance · NC

The Collision Mitigation Braking System (CMBS) repeatedly has applied breaks under both highway and non-highwaty road conditions when there was no vehicle or presence of other risk factors that should have caused the system to activate. This continues to occur even after the vehicle indicated a functional issue with the system "CMBS(TM) Problem - The Collision Mitigation Braking System(TM) has a problem. Restart your vehicle. If the indicator remains on, have your vehicle checked by a dealer." on January 2, 2026, that Honda repaired/replaced sensors under warranty work stating the radar failed. The result of this condition has led to a number of false mitigation breaking at highway speeds and on non-highway roads. It has resulted in three near accidents over a period of 5 months. This presents itself every time I do not turn off the system manually. The Forward Collision Warning system presents warning notices when there is oncoming traffic on a two lane road and when there are curves in the road. It has also presented itself on the highway with oncoming traffic on curves in the road and when there is a minimal highway division in the center.

Filed May 1, 2026 · Driver assistance · GA

The forward collision warning system consistently produces false errors resulting in flashing lights, shaking wheel, and audible alarms causing significant distraction from driver's focus. Daily frequency of alarms creates a false alarm risk as driver has to mentally adjust to ignore the alarm features in order to focus on driving. Primarily occurs on two lane roads where oncoming traffic is regularly misidentified by the system. Roughly 1-3 times per day on a 10 mile commute.