DI_a129 — Epb Not Applied

Full alert identifier: DI_a129_epbNotApplied

Message shown in the car

Parking brake not set Vehicle may be free rolling

Alert description

The drive interface (DI) electronic control unit (ECU) detects a condition that prevents the electronic parking brake (EPB) from being set while the vehicle is not moving.

Potential impact

The EPB is not applied, and the vehicle may be free rolling.

Set condition

The DI ECU detects a condition that prevents it from setting the EPB.

Clear condition

The DI ECU detects that the condition clears.

Check other alerts

With Service Mode Plus enabled, open Service Alerts → All. Review the other alerts for clues to the cause of DI_a129.

DI_a023 — Car Not Parked DI_a023_carNotParked The drive interface (DI) electronic control unit (ECU) detects that the electronic park brake (EPC) ECU is missing (MIA) and as a result cannot honor the park request.
DI_a167 — Key Not Authenticated DI_a167_keyNotAuthenticated The drive interface (DI) electronic control unit (ECU) does not detect a valid key (key card, key fob, phone as key, or Tesla mobile app).
DI_a175 — Crs Not Available DI_a175_crsNotAvailable The drive interface (DI) electronic control unit (ECU) detects a condition that prevents it from engaging cruise control.
DI_a227 — Contactors Not Closed DI_a227_contactorsNotClosed The drive interface (DI) electronic control unit (ECU) has not started the drive rail yet because the high voltage (HV) system is not yet energized for drive.
DI_a171 — Drive Rail Not Requested DI_a171_driveRailNotRequested The drive interface (DI) electronic control unit (ECU) cannot confirm that a vehicle controller ECU requested a drive state, and as a result blocks shifting into Drive or Reverse.

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