Powertrain
generic / SAE
P2E71
Hybrid/EV Battery Pack B Cell Thickness Sensor Circuit High
The cell thickness sensor of HV battery pack B reports voltage above the expected window. Cell-group voltage monitoring is the foundation of HV battery safety — drift here triggers contactor opening, charge inhibit, and reduced power to protect the pack.
SystemPowertrain
Typegeneric / SAE
GroupP2
Range / numberE / 71
Possible causes
- Signal wire shorted to B+ high
- Open sensor 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: 800–8000 €
- Estimated time: 4–20 h
- Component: hybrid battery pack b
- Component: hybrid battery pack b thickness sensor
- Component: bms
- MIL / check engine light
- drive cycle required
- limp mode possible
Sources
References
sae:J2012