OBD-II code · Powertrain (generic)
P0B70 Hybrid/EV Battery Voltage Sense K Circuit High
The BMS detects a circuit high fault on voltage sense channel K of the high-voltage battery. Cell-group voltage measurement is unreliable on this channel.
Is it safe to drive with P0B70?
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 K, Wiring Harness, Bms
Related codes
- P0B52Hybrid/EV Battery Voltage Sense E Circuit High
- P0B57Hybrid/EV Battery Voltage Sense F Circuit High
- P0B5CHybrid/EV Battery Voltage Sense G Circuit High
- P0B61Hybrid/EV Battery Voltage Sense H Circuit High
- P0B66Hybrid/EV Battery Voltage Sense I Circuit High
- P0B6BHybrid/EV Battery Voltage Sense J Circuit High
- P0B75Hybrid/EV Battery Voltage Sense L 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
- P0B6DHybrid/EV Battery Voltage Sense K Circuit
- P0B6EHybrid/EV Battery Voltage Sense K Circuit Range/Performance
- P0B6FHybrid/EV Battery Voltage Sense K Circuit Low
- P0B71Hybrid/EV Battery Voltage Sense K Circuit Intermittent/Erratic
- P0B72Hybrid/EV Battery Voltage Sense L Circuit
- P0B73Hybrid/EV Battery Voltage Sense L Circuit Range/Performance
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.