DIF family
DIF_a174_unitMayNotRestart
Vehicle may not restart
What does the DIF_a174_unitMayNotRestart alert mean?
Drive Inverter Warning: Unit may not allow drive on the next drive cycle due to HW damage
What you'll see in your Tesla
- Vehicle may not restart
- Service is required
What triggers it
Inverter detects a shorted switch
When it clears
Does not clear
Potential impact
Inverter may not allow drive on next drive cycle
Affected models
Cybertruck
Model 3 2017-2023
Model 3 2024+
Model S 2021+
Model X 2021+
Model Y
Model Y 2025+
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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.