Here we go again. Honda has issued a major recall in the United States, affecting more than 635,000 vehicles across its core brand and the luxury Acura marque. The problem concerns the electric power steering (EPS) system, which could unexpectedly enter failsafe mode and stop providing steering assistance.
According to the National Highway Traffic Safety Administration (NHTSA), the recall covers certain 2021-2025 TLX, 2022-2024 MDX, and 2023-2025 Pilot vehicles. In total, the campaign potentially affects 635,808 vehicles.
The issue stems from an improper software configuration in the electric power steering system. Under certain operating conditions, the software could trigger an internal error and instruct the EPS system to enter failsafe mode. Once that happens, the system disables power steering assistance. Honda reported the problem to NHTSA on October 29, under recall number 26V721000. The manufacturer has identified the supplier-developed software as the source of the problem.
The technical explanation is a little more complicated than a typical software glitch. According to Honda's recall report, the supplier developed incorrect EPS software containing an error in the Driver Attention Monitor's road-condition compensation calculation.
Under specific operating conditions, the software may attempt a floating-point division by zero, triggering an internal error. The EPS software was incorrectly configured to respond by shutting down power steering assistance.
Things could be a lot worse because it doesn't mean drivers suddenly lose the ability to turn the steering wheel altogether. The mechanical steering connection remains, but drivers must apply considerably more force to change direction without the electric assistance, just like in the old days when EPS wasn't available.
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