OBD-II code · Powertrain (generic)
P0B3F Hybrid/EV Battery Voltage Sense A Circuit Intermittent/Erratic
The BMS detects a circuit intermittent/erratic fault on voltage sense channel A of the high-voltage battery. Cell-group voltage measurement is unreliable on this channel.
Is it safe to drive with P0B3F?
The car may go into limp mode (reduced power). Get it diagnosed before a long trip.
Common causes
- Most likelySense connector not seated
- PossibleNoisy ground reference
- Less likelyConnector with intermittent contact under vibration
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
- 2–8 h
- Emissions test
- Usually unaffected
- Parts involved
- Hv Battery Voltage Sense A, Wiring Harness, Bms
Related codes
- P0B44Hybrid/EV Battery Voltage Sense B Circuit Intermittent/Erratic
- P0B49Hybrid/EV Battery Voltage Sense C Circuit Intermittent/Erratic
- P0B4EHybrid/EV Battery Voltage Sense D Circuit Intermittent/Erratic
- P0B53Hybrid/EV Battery Voltage Sense E Circuit Intermittent/Erratic
- P0B58Hybrid/EV Battery Voltage Sense F Circuit Intermittent/Erratic
- P0B5DHybrid/EV Battery Voltage Sense G Circuit Intermittent/Erratic
- P0B62Hybrid/EV Battery Voltage Sense H Circuit Intermittent/Erratic
- P0B67Hybrid/EV Battery Voltage Sense I Circuit Intermittent/Erratic
- P0B6CHybrid/EV Battery Voltage Sense J Circuit Intermittent/Erratic
- P0B71Hybrid/EV Battery Voltage Sense K Circuit Intermittent/Erratic
- P0B76Hybrid/EV Battery Voltage Sense L Circuit Intermittent/Erratic
- P0B7BHybrid/EV Battery Voltage Sense M Circuit Intermittent/Erratic
- P0B3CHybrid/EV Battery Voltage Sense A Circuit Range/Performance
- P0B3DHybrid/EV Battery Voltage Sense A Circuit Low
- P0B3EHybrid/EV Battery Voltage Sense A Circuit High
- P0B40Hybrid/EV Battery Voltage Sense B Circuit
- P0B41Hybrid/EV Battery Voltage Sense B Circuit Range/Performance
- P0B42Hybrid/EV Battery Voltage Sense B Circuit Low
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.