What it means
The coupler lock control circuit voltage is lower than expected. This can prevent the connector from locking or being released, and may interrupt charging.
At a glance
- Usually lights the check-engine light
- The engine or gearbox may go into limp mode
How it works
The coupler lock actuator uses a control circuit to secure or release the charging connector. The charger monitors voltage on the lock control circuit and sets P0D92 when it is lower than expected, consistent with a short to ground, an internally shorted actuator, or excessive resistance at a connector.
Common causes
Most likely first.
- Wire shorted to ground
- Actuator internal short
- Connector pins corroded - high contact resistance
Symptoms
- Charge status indicator shows fault
- Charging may not start or interrupts
- Slower-than-expected charge rate
How to diagnose it
- Review freeze-frame and live charging data to confirm the low-voltage fault occurs when the coupler lock is commanded.
- Inspect the inlet, actuator connector, and lock control wiring for corrosion, moisture, pin damage, or a wire rubbed through to ground.
- Check connector terminals for corrosion or poor contact that could add resistance to the lock circuit.
- Command the coupler lock with a scan tool, if supported, and observe whether its operation coincides with the low circuit reading.
- Test the lock circuit for a short to ground and check the actuator and connector voltage drop using the manufacturer's procedure.
Common fixes
- Clean and secure corroded or loose lock-circuit terminals using an approved repair method.
- Repair wiring that is shorted to ground.
- Replace a damaged connector or terminal causing excessive contact resistance.
- Replace the coupler lock actuator if it is internally shorted.
Can I keep driving?
The connector may not lock or release correctly, and charging may be interrupted or unavailable. Do not force the connector, and use the vehicle's manual release procedure if it remains locked.
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.