What it means
The ECM detects a range/performance fault on the battery charger a coupler lock position 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 A coupler lock position sensor reports the lock mechanism's position so the control module can verify the charging connector is secured. This code sets when the signal is present but outside the expected range or fails to track lock movement correctly.
Common causes
Most likely first.
- Sensor characteristic drifted
- Sensor mounting displaced
- Sensor element aged beyond calibration window
Symptoms
- Charge status indicator shows fault
- Charging may not start or interrupts
- Slower-than-expected charge rate
How to diagnose it
- Record freeze-frame data and compare the live lock-position reading as the charger A coupler is unlocked and locked according to the vehicle's instructions.
- Inspect the lock mechanism and sensor mounting for displacement, wear, or obstruction that could prevent the sensor from tracking position.
- Check the sensor connector and wiring for loose connections, corrosion, or damage.
- Test the lock-position sensor's output across lock movement and compare it with the manufacturer's specification.
- If the mechanical fit, sensor, and wiring check out, use the vehicle's diagnostic information to check the module input.
Common fixes
- Clear debris from the charger A coupler lock mechanism.
- Correct a displaced sensor mounting and secure the sensor.
- Repair a loose connector or damaged wiring.
- Replace the lock-position sensor if its output is out of specification.
Can I keep driving?
Charging may be refused or interrupted if the vehicle cannot reliably confirm the charger A coupler's locked position. Make sure the connector is fully seated and locked, and do not force it if the lock does not engage.
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.