What it means
The hybrid/EV battery pack state of charge is higher than the calibrated limit. The code does not identify the cause of the high reading.
At a glance
- Usually lights the check-engine light
- The engine or gearbox may go into limp mode
How it works
The hybrid or electric battery management system estimates the battery pack's state of charge from pack measurements and its control model. This code sets when the reported charge level is above the system's calibrated limit. It identifies a high state-of-charge condition, but does not establish whether the pack is genuinely overcharged or the measurement or control system is at fault.
Common causes
Most likely first.
- Battery pack state of charge above specification
- Battery state-of-charge measurement or control fault
Symptoms
- Hybrid/EV warning light may illuminate
- Electric assist or regenerative charging may be limited
- EV operation may be unavailable
How to diagnose it
- Save freeze-frame data and review battery live data for reported state of charge, pack voltage, and any limits on charging or electric operation.
- Check for related battery, voltage, or state-of-charge codes that could point to a measurement or control fault.
- Review whether regenerative charging or other recent operating conditions coincided with the high reading, using the freeze-frame context.
- Inspect accessible battery monitoring connectors and wiring for damage or loose connections, following the manufacturer's high-voltage safety procedures.
- Compare state-of-charge and battery measurements with manufacturer diagnostics to distinguish a genuinely high charge from a reporting fault.
- If measurements are inconsistent, follow manufacturer diagnostics for the battery monitoring and control system.
Common fixes
- Repair a damaged or loose battery monitoring connector or harness identified by inspection.
- Correct a confirmed battery measurement or state-of-charge monitoring fault.
- Repair or replace a battery control component only if manufacturer testing confirms the fault.
- Clear the code and confirm state-of-charge readings and charging limits return to the expected behavior.
Can I keep driving?
If the vehicle displays a hybrid or battery warning, reduced power, or a shutdown message, follow the owner's manual and avoid relying on electric operation or regenerative charging. If it drives normally, arrange prompt diagnosis because charging and electric assist may be limited.
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.