What it means
The coupler lock control circuit voltage is higher 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 secures the charging connector in the inlet, and its control circuit carries the command monitored by the charger. P0D93 sets when the lock control circuit voltage is higher than expected, which can result from a short to battery power, an open actuator, or a poor connector contact.
Common causes
Most likely first.
- Wire shorted to B+
- Open actuator
- 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
- Check freeze-frame and live charging data to see whether the high circuit reading appears when the coupler lock is commanded.
- Inspect lock-circuit wiring for contact with a battery-positive feed, insulation damage, or an incorrectly routed repair.
- Check the actuator connector for corrosion, loose terminals, or pins that are not making proper contact.
- Use a scan tool, if supported, to command the coupler lock and note whether the actuator operates while the circuit remains high.
- Test the lock control wire for a short to battery power and test the actuator circuit using the manufacturer's procedure.
Common fixes
- Repair wiring shorted to battery power.
- Repair loose, corroded, or damaged lock-circuit terminals.
- Restore the actuator connection if an open connection is causing the high reading.
- Replace the coupler lock actuator if its internal circuit is open or faulty.
Can I keep driving?
The connector may not lock or release correctly, which can prevent or interrupt charging. Do not pull or force a connector that is locked; use the vehicle's manual release instructions if needed.
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.