DI_a177_tireFitmentChanged

The drive interface (DI) electronic control unit (ECU) detects a significant change in tire circumference ratio from front to rear axle, between square (similar circumference) and staggered (different circumference) during a drive cycle.

Live incidence rate

<0.01% (Extremely rare)

Vehicle messages

None displayed

Impact

If the tire fitment change detection is a false positive (no change in front to rear tire circumference ratio), user may experience more traction control activity. No impact if detection is a true positive (a change has occurred).

Description

The drive interface (DI) electronic control unit (ECU) detects a significant change in tire circumference ratio from front to rear axle, between square (similar circumference) and staggered (different circumference) during a drive cycle.

Cause

Set when vehicle detects the ratio of tire circumference from front to rear axle has changed between square (similar circumference) and staggered (different circumference) during a drive cycle, and tire config was not requested.

Clear condition

Clear on inverter power cycle.

Models

Cybertruck, Model 3 2017-2023, Model 3 2024+, Model S 2021+, Model X 2021+, Model Y, Model Y 2025+, Semitruck

Visibility

service

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