OBD-II code · Powertrain (generic)
P0B8D Hybrid/EV Battery Voltage Sense Q Circuit Low
The BMS detects a circuit low fault on voltage sense channel Q of the high-voltage battery. Cell-group voltage measurement is unreliable on this channel.
Is it safe to drive with P0B8D?
The car may go into limp mode (reduced power). Get it diagnosed before a long trip.
Common causes
- Most likelySense wire shorted to ground
- PossibleOpen in sense wire
- 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 Q, Wiring Harness, Bms
Related codes
- P0B6FHybrid/EV Battery Voltage Sense K Circuit Low
- P0B74Hybrid/EV Battery Voltage Sense L Circuit Low
- P0B79Hybrid/EV Battery Voltage Sense M Circuit Low
- P0B7EHybrid/EV Battery Voltage Sense N Circuit Low
- P0B83Hybrid/EV Battery Voltage Sense O Circuit Low
- P0B88Hybrid/EV Battery Voltage Sense P Circuit Low
- P0B92Hybrid/EV Battery Voltage Sense R Circuit Low
- P0B97Hybrid/EV Battery Voltage Sense S Circuit Low
- P0B9CHybrid/EV Battery Voltage Sense T Circuit Low
- P0BA1Hybrid/EV Battery Voltage Sense U Circuit Low
- P0BA6Hybrid/EV Battery Voltage Sense V Circuit Low
- P0BABHybrid/EV Battery Voltage Sense W Circuit Low
- P0B8AHybrid/EV Battery Voltage Sense P Circuit Intermittent/Erratic
- P0B8BHybrid/EV Battery Voltage Sense Q Circuit
- P0B8CHybrid/EV Battery Voltage Sense Q Circuit Range/Performance
- P0B8EHybrid/EV Battery Voltage Sense Q Circuit High
- P0B8FHybrid/EV Battery Voltage Sense Q Circuit Intermittent/Erratic
- P0B90Hybrid/EV Battery Voltage Sense R Circuit
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.