What it means
The BMS detects deterioration in HV battery pack section F. Capacity or internal resistance outside service limits.
At a glance
- Usually lights the check-engine light
- The engine or gearbox may go into limp mode
How it works
The battery management system monitors the condition of each high-voltage battery section, and this code names section F. It evaluates section F's capacity, internal resistance, and balance against service limits. P0EE3 is set when the measured condition of section F falls outside the allowed range.
Common causes
Most likely first.
- Cells aged - capacity reduced
- Internal resistance increased
- Pack 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
How to diagnose it
- Save freeze-frame data and retrieve section F capacity, resistance, and cell-balance readings from the battery management system.
- Compare section F with the other battery sections under similar charge and load conditions to see whether the issue is confined to F.
- Inspect the cooling route and accessible section F connectors for restricted airflow, damaged insulation, corrosion, or loose terminals using the prescribed high-voltage safety procedure.
- Check section F temperature and sensing data for implausible readings that could indicate a sensor or circuit fault.
- Use the manufacturer's battery evaluation procedure to confirm cell deterioration or imbalance before replacing pack components.
Common fixes
- Clear a confirmed battery cooling obstruction.
- Repair damaged section F wiring or connector contacts.
- Replace a sensing component only if its fault is confirmed by testing.
- Repair or replace the battery section or pack if section F deterioration is confirmed.
Can I keep driving?
Reduced range and power can worsen, and limp operation may leave limited acceleration; avoid long trips and heavy loads. Stop safely if the vehicle loses enough power to make continued driving unsafe.
A code shows where the control module detected a fault, not always which part failed. Check the causes in order and confirm with a test before replacing parts. Have several codes? Check them together
This is a generic code: it means the same on every make. The car’s maker may add more detail in its own service information.