P0B13
Hybrid/EV Battery Pack Current Sensor A/B Correlation
The signals of HV battery pack current sensors A and B do not correlate within the calibrated tolerance. Sensor drift or harness offset.
- Check engine light: Yes
- Emissions related: No
- Repair difficulty: hard
Symptoms
- EV/hybrid system warning light on
- Reduced power output or limp mode
- Charging may fail or be slowed
- Reduced electric range
Common causes
Ordered by how often each turns out to be the cause.
- One sensor driftedCommon
- Ground offset between sensorsPossible
- Pack cell imbalance approaching service thresholdLess likely
Parts involved
- Hv Battery Pack Current Sensor A
- Hv Battery Pack Current Sensor B
- Bms
P0B13 is a generic OBD-II code defined by SAE J2012. Exact wording and diagnostic procedure vary by manufacturer and model. Code definitions are drawn from the public-domain OBDex dataset; the workshop notes are our own.