VCLEFT_a259_LVVoltageDropOnHighLoadCurrent
Not Available
What does the VCLEFT_a259_LVVoltageDropOnHighLoadCurrent alert mean?
The vehicle controller detects the low voltage (LV) battery voltage is lower than expected during a precharge event. When this occurs too many times, separate alerts will also be present to indicate precharging the high voltage (HV) bus may not succeed and the LV battery may need replacement.
What you'll see in your Tesla
- Not Available
What triggers it
An instant resistance check of the LV battery connections to the vehicle controller does not succeed (does not return a healthy result). Alert log signal data should provide more information on specifics, including load current, LV battery temperature, and any detected voltage dip.
When it clears
Clears automatically.
Potential impact
The LV battery may be unable to support vehicle electrical systems, including precharging the high voltage (HV) bus.
Affected models
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.