EPAS3S family
EPAS3S_a138_difMia
Not Available
What does the EPAS3S_a138_difMia alert mean?
The secondary Electric Power Assist Steering (EPAS3S) electronic control unit (ECU) is not receiving the expected messages from the front drive inverter (DIF) ECU on the Chassis controller area network (CAN) bus.
What you'll see in your Tesla
- Not Available
What triggers it
The EPAS3S ECU does not receive the expected messages from the DIF ECU on the Chassis CAN bus.
When it clears
The EPAS3S ECU begins receiving the expected messages from the DIF ECU on the Chassis CAN bus.
Potential impact
Steering assist may be reduced or may not function as expected.
Affected models
Model S 2021+
Model X 2021+
Track your Tesla's alerts automatically
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.