Adaptive Cruise Control problems of the 2024 Honda Ridgeline

The vehicle’s engine and powertrain management system repeatedly fails with multiple dtc's triggering a full-system cascade of safety-critical warnings and automatic power-limiting. The issue affects the engine, transmission, emissions, awd, brake system, stability assist, steering assist, abs/vsa, hill-start assist. The vehicle is fully available for inspection upon request. During each failure, the vehicle abruptly enters reduced-power “limp mode” without warning—resulting in loss of engine power, disabled awd, and disables all safety/stability systems. These events have occurred in normal traffic, including at red lights and in intersections, creating a risk of rear-end collisions, inability to accelerate, and loss of vehicle control. I transport an autistic child, making reliability and predictable vehicle behavior critical to passenger safety as well. The problem has been reproduced and documented by multiple authorized Honda dealerships. The vehicle has now undergone 13 repair attempts in the first 14 months of ownership, across 6 different Honda dealerships. All have been unable to diagnose or permanently repair the defect. The vehicle has been repeatedly inspected by Honda technicians, who escalated the issue to Honda tech line. Tech line documents (dated 10/1/25) show that no aftermarket modifications exist and that the failure is verified but intermittent and ongoing. Warning lamps / symptoms: each failure event triggers a full dashboard sweep including: – awd system problem – emissions system problem – transmission system problem – power steering system problem – vehicle stability assist problem – hill start assist problem – brake system warning – road departure mitigation problem – blind spot information system problem there is a federal lawsuit filed filed in oregon district court case 6:25-cv-02142-ap.

While idling at a traffic light,2 systems shut down: adaptive cruise control & road departure mitigation system. Also the brake system light came on, but the brakes continued to work.