DI family
DI_a181_rearMotorMode
Front motor disabled
What does the DI_a181_rearMotorMode alert mean?
The drive interface (DI) electronic control unit (ECU) only sending torque to the rear drive axle.
What you'll see in your Tesla
- Front motor disabled
- Power reduced - Drive with caution
What triggers it
The DI ECU detects a condition affecting the front drive unit, and only sends power to the rear drive unit.
When it clears
The DI ECU detects that the condition clears.
Potential impact
Torque and power are only being produced from the rear drive unit.
Affected models
Cybertruck
Model 3 2017-2023
Model 3 2024+
Model S 2021+
Model X 2021+
Model Y
Model Y 2025+
Semitruck
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Alerts like this reach MyTeslaMate through your car's Tesla telemetry API. MyTeslaMate logs every alert your Tesla reports and turns it into readable history and real-time notifications — hosted TeslaMate with no server to run.