Powertrain
Definition only
Lights the check engine lamp
P2E70: Hybrid/EV Battery Pack B Cell Thickness
Standardized SAE J2012 code · P2Exx codes
What does P2E70 mean?
The BMS detects abnormal cell thickness in HV battery pack B. Cell swelling indicates aging, thermal stress, or imminent failure.
The code tells you which monitor failed, not which part is broken. Test before replacing parts.
Symptoms
- EV/hybrid system warning light on
- Reduced power output or limp mode
- Charging may fail or be slowed
- Reduced electric range
Common causes
- High Cells aged - swelling
- Medium Thermal stress damaged cells
- Low Pack cell imbalance approaching service threshold
Likelihood is a general estimate across vehicles; your make and model may differ.
Add your car to see reports of P2E70 on the same make and model first.
P2E70 in the community
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