OBD-II code · Powertrain (generic)
P0B24 Hybrid/EV Battery A Voltage Unstable
The voltage measurement of HV battery A fluctuates beyond the expected window. Loose connection or unstable cell.
Is it safe to drive with P0B24?
The car may go into limp mode (reduced power). Get it diagnosed before a long trip.
Common causes
- Most likelyLoose busbar or terminal connection
- PossibleCell with unstable internal resistance
- Less likelyPack cell imbalance approaching service threshold
Symptoms
- EV/hybrid system warning light on
- Reduced power output or limp mode
- Charging may fail or be slowed
- Reduced electric range
Repair at a glance
- Difficulty
- Hard
- DIY friendly
- Best left to a mechanic
- Typical labour
- 3–16 h
- Emissions test
- Usually unaffected
- Parts involved
- Hv Battery A, Bms
Related codes
- P0B28Hybrid/EV Battery B Voltage Unstable
- P0B2CHybrid/EV Battery C Voltage Unstable
- P0B30Hybrid/EV Battery D Voltage Unstable
- P0B21Hybrid/EV Battery Pack Voltage Sense D Circuit High
- P0B22Generator Phase U Current Sensor Circuit
- P0B23Hybrid/EV Battery A Voltage
- P0B25Hybrid/EV Battery A Voltage Low
- P0B26Hybrid/EV Battery A Voltage High
- P0B27Hybrid/EV Battery B Voltage
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.