OBD-II code · Powertrain (generic)
P0B75 Hybrid/EV Battery Voltage Sense L Circuit High
The BMS detects a circuit high fault on voltage sense channel L of the high-voltage battery. Cell-group voltage measurement is unreliable on this channel.
Is it safe to drive with P0B75?
The car may go into limp mode (reduced power). Get it diagnosed before a long trip.
Common causes
- Most likelySense wire shorted to higher voltage
- PossibleReference regulator overvoltage
- Less likelyConnector pins corroded - high contact resistance
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 L, Wiring Harness, Bms
Related codes
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- P0B6BHybrid/EV Battery Voltage Sense J Circuit High
- P0B70Hybrid/EV Battery Voltage Sense K Circuit High
- P0B7AHybrid/EV Battery Voltage Sense M Circuit High
- P0B7FHybrid/EV Battery Voltage Sense N Circuit High
- P0B84Hybrid/EV Battery Voltage Sense O Circuit High
- P0B89Hybrid/EV Battery Voltage Sense P Circuit High
- P0B8EHybrid/EV Battery Voltage Sense Q Circuit High
- P0B93Hybrid/EV Battery Voltage Sense R Circuit High
- P0B72Hybrid/EV Battery Voltage Sense L Circuit
- P0B73Hybrid/EV Battery Voltage Sense L Circuit Range/Performance
- P0B74Hybrid/EV Battery Voltage Sense L Circuit Low
- P0B76Hybrid/EV Battery Voltage Sense L Circuit Intermittent/Erratic
- P0B77Hybrid/EV Battery Voltage Sense M Circuit
- P0B78Hybrid/EV Battery Voltage Sense M Circuit Range/Performance
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.