Too quiet for the city: Ford's hybrids may skip the sound that warns pedestrians

© A. Krivonosov

Ford is facing not a classic engine or brake failure, but a problem of a new era: the Explorer and Lincoln Nautilus hybrids turned out to be too quiet in situations where the law requires an artificial sound. According to NHTSA filings, recall 26V415 covers 66,383 vehicles, and the earlier service campaign 25V691 did not fully close the issue.

The recall involves the Lincoln Nautilus Hybrid from 2024–2027 and the Ford Explorer Hybrid from 2025–2027. Ford's report lists 48,141 Nautilus and 18,242 Explorer units. The defect shows up when the car moves in electric mode below 30 km/h: because of an audio-system error, the vehicle may fail to switch on the warning sound for pedestrians. The driver may then see the message «Pedestrian Sounder Fault. Service Now».

The problem is especially awkward in city driving. In parking lots, courtyards, near crosswalks and in traffic jams, a hybrid moves almost silently, while pedestrians often rely not only on sight but also on hearing. Ford says it is not aware of any crashes or injuries linked to this defect, but the regulator classifies the risk as a safety threat.

Technically, the recall does not look simple. For the Lincoln Nautilus HEV with its 28-speaker audio system, dealers will replace the digital signal processing (DSP) module. For the remaining Nautilus and Explorer vehicles, a fix is still being developed: Ford is looking into not only the DSP fault but also a possible loss of communication between the ACM audio module and the APIM interface module. Dealer notifications are scheduled for July 7, 2026, and owners will be notified between August 3 and 7.

The most practical advice for owners is to check the VIN after July 7 and not to ignore the Pedestrian Sounder Fault message: in the city, a hybrid’s silence can become not an advantage but a legal and service risk.