What it means
The module monitors current in the hybrid or electric battery system. It sets this code when current is outside the expected range; the title does not specify whether it is too high or too low.
How it works
The hybrid/EV battery system current measurement tells the control module how much current is moving into or out of the high-voltage battery. This code indicates that measured current is outside the expected range, but the code title does not specify whether it is too high or too low.
Common causes
Most likely first.
- Battery current sensor or circuit fault
- Battery system operating condition outside expected range
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
- Scan the battery and hybrid/EV modules, preserving freeze-frame data and live current readings to establish whether the event occurred during charging, acceleration, or regeneration.
- Compare battery current with related voltage, temperature, and state-of-charge data and the manufacturer's expected behavior for that operating condition.
- Inspect the battery current sensor connections and accessible harness sections for damage, poor seating, corrosion, or signs of overheating.
- Check related battery and charging codes to determine whether the current reading is part of a wider battery-system fault.
- Test the current sensor and its circuit using the manufacturer's procedures, and compare indicated current with an approved measurement method where specified.
Common fixes
- Secure or repair a loose or damaged battery current sensor connector.
- Repair wiring or terminal faults in the battery current sensing circuit.
- Replace the battery current sensor if it fails the specified test.
- Repair the underlying battery or charging-system fault if confirmed by diagnosis.
Can I keep driving?
Reduced power, slow or failed charging, or reduced electric range may occur, and limp mode is possible. Avoid relying on the vehicle for a long trip until the battery-system warning is resolved; stop safely if power becomes unreliable.
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.