OBD-II code · Powertrain (generic, extended)
P2E70 Hybrid/EV Battery Pack B Cell Thickness
The BMS detects abnormal cell thickness in HV battery pack B. Cell swelling indicates aging, thermal stress, or imminent failure.
Is it safe to drive with P2E70?
The car may go into limp mode (reduced power). Get it diagnosed before a long trip.
Common causes
- Most likelyCells aged - swelling
- PossibleThermal stress damaged cells
- Less likelyPack cell imbalance approaching service threshold
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
- 4–20 h
- Emissions test
- Usually unaffected
- After the fix
- A drive cycle is needed before the light stays off
- Parts involved
- Hybrid Battery Pack B, Hybrid Battery Pack B Thickness Sensor, Bms
Related codes
- P2E6CHybrid/EV Battery Pack A Cell Thickness
- P2E6DHybrid/EV Battery Pack A Cell Thickness Sensor Circuit High
- P2E6EHybrid/EV Battery Pack A Cell Thickness Sensor Circuit Low
- P2E6FHybrid/EV Battery Pack A Cell Thickness Sensor Circuit Performance
- P2E71Hybrid/EV Battery Pack B Cell Thickness Sensor Circuit High
- P2E72Hybrid/EV Battery Pack B Cell Thickness Sensor Circuit Low
- P2E73Hybrid/EV Battery Pack B Cell Thickness Sensor Circuit Performance
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.