Powertrain
generic / SAE
P0B84
Hybrid/EV Battery Voltage Sense O Circuit High
The BMS detects a circuit high fault on voltage sense channel O of the high-voltage battery. Cell-group voltage measurement is unreliable on this channel.
SystemPowertrain
Typegeneric / SAE
GroupP0
Range / numberB / 84
Possible causes
- Sense wire shorted to higher voltage high
- Reference regulator overvoltage medium
- Connector pins corroded - high contact resistance low
Symptoms
- EV/hybrid system warning light on
- Reduced power output or limp mode
- Charging may fail or be slowed
- Reduced electric range
Inspection / repair
- Difficulty: hard
- DIY: shop recommended
- Estimated cost: 300–2500 €
- Estimated time: 2–8 h
- Component: hv battery voltage sense o
- Component: wiring harness
- Component: bms
- MIL / check engine light
- limp mode possible
Sources
References
sae:J2012