NHTSA Complaint #11704877 — 2017 FORD EXPLORER

I am reporting a safety-related defect involving the electric power steering system on my 2017 Ford Explorer. The vehicle displays a “Steering System Fault” warning, and when this occurs the power steering assist is reduced or disabled, creating a safety risk during low-speed driving, turning, and parking. When the ignition is on with the engine off, multiple communication fault codes appear, including U0100, U0131, U0140, and U0151. After the engine is started, these communication codes disappear, but the steering fault warning remains illuminated and no active fault codes are stored. This behavior indicates the steering system enters a fail-safe state during startup and does not recover. The battery was tested and replaced. Fuses, relays, wiring, grounds, and voltage drop during engine cranking were checked and found to be normal. Steering system reset and relearn procedures were performed using diagnostic tools, but the issue persisted. No external electrical or communication network problems were identified. Based on these findings, the problem appears to be an internal failure of the electric power steering rack or its control module. The loss or reduction of steering assist can occur without warning and increases the risk of a crash. This issue is commonly reported on 2016–2018 Ford Explorer vehicles, suggesting a design or durability defect. I am submitting this complaint to request that NHTSA investigate this condition as a potential safety defect.