UI family
UI_a227_tplcMIA
Trailer Anti-Lock Braking System status unavailable
What does the UI_a227_tplcMIA alert mean?
The Trailer Power Line Communication (PLC) Electronic Control Unit (ECU) is MIA while in drive or accessory power state.
What you'll see in your Tesla
- Trailer Anti-Lock Braking System status unavailable
- Service required - Proceed with caution
What triggers it
The Trailer PLC ECU was detected MIA while in drive or accessory power state.
When it clears
The Trailer PLC ECU is detected while in drive or accessory power state.
Potential impact
Trailer Anti-Lock Braking System may be unavailable.
Affected models
Semitruck
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