APP_w399_brakeboosterMia
Not Available
What does the APP_w399_brakeboosterMia alert mean?
One or more of the messages the Autopilot electronic control unit (ECU) receives periodically from the Brake Booster (BB) is not received on the Party bus, indicating the brake ECU may be unavailable (MIA).
What you'll see in your Tesla
- Not Available
What triggers it
One or more of the expected messages from the Brake Booster (BB) is not received on the Party bus.
When it clears
The Autopilot ECU starts receiving expected messages from the Brake Booster (BB) on the Party bus.
Potential impact
Autopilot features such as Traffic-Aware Cruise Control (TACC) may be unavailable, or may not function as expected.
Affected models
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