Software bugs in some 2021 Mustang Mach-Es are causing unintentional acceleration

A software error led to the recall of the 464 Ford Mustang Mach-Es The problem affects the powertrain control module and can lead to unintentional acceleration.

According to a manufacturer’s notice to dealers, the problem is related to functional security monitors, which may fail to detect or incorrectly detect a software error. This, in turn, can lead to unintentional acceleration, deceleration, or general unwanted vehicle movement, depending on the specific problem.

Ford found that the system could ignore the unwanted movement of the secondary axle or incorrectly detect lateral hazards on the primary axis, leading to this condition. Naturally, this is bad because a random movement or loss of objective power can increase the risk of an accident.

Read more: Ford withdraws issue for Mustang Mac-E for faulty subframe bolt

Finally, the fault lies with the software which was incorrectly updated in the program file of the next model year. This functional security software always reports the zero torque value of secondary Excel. Fortunately, a faulty light or wrench light on the dashboard may alert you to the problem.

Beginning May 30, Ford will reach out to customers about this issue, which it hopes to fix with an over-the-air update. This can be done from their driveway, but if a customer wants, they can return their car to the dealership to have the technician install the update at no extra cost.

The updated Powertrain control module software will be updated to accurately report the value of secondary axle torque. This problem only affects some cars made between October 3, 2020 and May 26, 2021.

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