OBD-II code · Powertrain (generic)
P0B8A Hybrid/EV Battery Voltage Sense P Circuit Intermittent/Erratic
The BMS detects a circuit intermittent/erratic fault on voltage sense channel P of the high-voltage battery. Cell-group voltage measurement is unreliable on this channel.
Is it safe to drive with P0B8A?
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 P, Wiring Harness, Bms
Related codes
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- P0B99Hybrid/EV Battery Voltage Sense S Circuit Intermittent/Erratic
- P0B9EHybrid/EV Battery Voltage Sense T Circuit Intermittent/Erratic
- P0BA3Hybrid/EV Battery Voltage Sense U Circuit Intermittent/Erratic
- P0BA8Hybrid/EV Battery Voltage Sense V Circuit Intermittent/Erratic
- P0B87Hybrid/EV Battery Voltage Sense P Circuit Range/Performance
- P0B88Hybrid/EV Battery Voltage Sense P Circuit Low
- P0B89Hybrid/EV Battery Voltage Sense P Circuit High
- P0B8BHybrid/EV Battery Voltage Sense Q Circuit
- P0B8CHybrid/EV Battery Voltage Sense Q Circuit Range/Performance
- P0B8DHybrid/EV Battery Voltage Sense Q Circuit Low
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.