What it means
The ECM detects a low fault on the battery charger hybrid/ev battery output current sensor circuit. Reading cannot be used reliably for control.
At a glance
- Usually lights the check-engine light
- The engine or gearbox may go into limp mode
How it works
The battery charger’s hybrid/EV battery output current sensor reports charger output current to the control module. This code sets when the signal is lower than the module expects, which can result from a signal short to ground, a sensor fault, or an open or high-resistance connection.
Common causes
Most likely first.
- Signal circuit short to ground
- Faulty current sensor
- Open or high-resistance wiring or connector
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
- Record freeze-frame data and check charger status and reported battery output current to confirm the low signal condition.
- Inspect the current sensor connector and wiring for damage, corrosion, loose terminals, or a signal wire contacting ground.
- Test the signal circuit for a short to ground and check for an open or high resistance using the manufacturer's procedure.
- Compare the current sensor output and circuit behavior with the manufacturer's specifications.
- Repair any short, open, or resistive connection found, then retest before replacing the sensor.
Common fixes
- Repair a signal wire shorted to ground.
- Repair an open or high-resistance connection and clean or replace corroded terminals.
- Replace the battery output current sensor if it fails the specified test.
Can I keep driving?
Charging may be slowed or unavailable, and reduced power or limp mode may limit driving; avoid trips that depend on normal charging or electric range. Stop safely if reduced propulsion power makes the vehicle difficult to drive safely.
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.