HVBATT family
HVBATT_a248_AcjbCpLineRelayWelded
Outlets and DC charging unavailable
What does the HVBATT_a248_AcjbCpLineRelayWelded alert mean?
The battery management system (BMS) has detected that the AC Junction Box (ACJB) Charge Port (CP) line relay has welded.
What you'll see in your Tesla
- Outlets and DC charging unavailable
- OK to AC charge - Service required
What triggers it
A welded ACJB charge port line relay is detected
When it clears
The BMS no longer qualifies the relay as welded.
Potential impact
Outlets unavailable. DC charging unavailable.
Affected models
Cybertruck
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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.