HVBATT_a737_Bp2CacImbalanceLimp
High voltage battery requires service
What does the HVBATT_a737_Bp2CacImbalanceLimp alert mean?
Calculated Amp-hour Capacity (CAC) difference of bricks within a module exceeds acceptable threshold. This results in reduced battery performance and limits maximum range. Vehicle enters Battery Management System (BMS) limp mode.
What you'll see in your Tesla
- High voltage battery requires service
- Acceleration and charging performance reduced
What triggers it
The estimated imbalance between the average CAC and minimum CAC within a single module exceeds the alert set threshold (CAC imbalance is not within acceptable range)
When it clears
The estimated CAC imbalance is under the alert clear threshold (CAC imbalance is within acceptable range)
Potential impact
BMS limp mode is triggered, with another alert present to indicate this condition.
Affected models
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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.