What it means
The ECM detects a intermittent/erratic fault on the battery charger 14 volt 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 14-volt output current sensor lets the control module track current on the charger output. This code sets when that sensor signal jumps or drops unpredictably, rather than remaining stable enough for charger control.
Common causes
Most likely first.
- Sensor connector not seated
- Noisy ground reference
- Connector with intermittent contact under vibration
Symptoms
- Charge status indicator shows fault
- Charging may not start or interrupts
- Slower-than-expected charge rate
How to diagnose it
- Save freeze-frame data and review the 14-volt output current and charger status for sudden changes around the fault.
- Inspect the sensor connector for a loose latch, poor seating, moisture, or damaged pins.
- Check the sensor wiring and ground reference for looseness, corrosion, or rubbing that could make contact vary with vibration.
- With the system made safe according to the manufacturer's procedure, monitor the signal while gently moving the harness to identify an intermittent connection.
- Test the sensor, ground, and signal wiring against the manufacturer's specifications before replacing the sensor.
Common fixes
- Seat and secure the current sensor connector.
- Clean or repair a loose, corroded, or damaged connector terminal.
- Repair an unstable ground reference or damaged wiring.
- Replace the 14-volt output current sensor if its signal remains erratic with sound wiring and connections.
Can I keep driving?
Charging may start and stop or proceed more slowly than expected; confirm the charge status before depending on the vehicle's range or availability. If propulsion power is reduced, avoid continued driving and follow the vehicle's warning instructions.
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.