P0ED1
Hybrid/EV Battery Multiple Sensor Voltage Correlation
The BMS detects that multiple HV battery voltage sensor readings disagree beyond calibration. SOC/SOH calculations unreliable.
- 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.
- Sensor offsets driftedCommon
- Sense wire resistance highPossible
- Pack cell imbalance approaching service thresholdLess likely
Parts involved
- Hv Battery Pack Voltage Sensors
- Bms
P0ED1 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.