What it means
The gear shift lock solenoid/actuator control circuit A reports a control circuit a/open condition. Selector lever interlock cannot be commanded reliably.
At a glance
- Usually lights the check-engine light
How it works
The gear shift lock solenoid or actuator controls the selector interlock, which normally prevents the lever from leaving Park until the release conditions are met. The control module sets this code when circuit A is open, so it may be unable to energize the interlock reliably.
Common causes
Most likely first.
- Open in control wire
- Open solenoid coil
Symptoms
- Selector may not shift out of Park
- Shift-lock warning or check-engine light may illuminate
How to diagnose it
- Record freeze-frame data and check live interlock status while pressing the brake and attempting to move the selector out of Park.
- Inspect the shift-lock solenoid or actuator connector and circuit A wiring for a loose connection, corrosion, damage, or a broken wire.
- Check whether the brake pedal input is recognized in live data, since the interlock may depend on that release condition.
- Test continuity through circuit A and the solenoid or actuator coil using the wiring diagram and manufacturer's procedure.
- If the circuit and coil pass, verify the module command and output against the manufacturer's specification.
Common fixes
- Secure the connector or repair a broken wire in gear shift lock circuit A.
- Clean corroded terminals and restore a sound connection.
- Replace the shift-lock solenoid or actuator if its coil is open.
- Repair the control module output only if testing confirms a module fault.
Can I keep driving?
The selector may remain locked in Park, leaving the vehicle unable to move; do not force the lever, as this can damage the interlock. Use the vehicle's specified shift-lock release only if you can do so safely, and have the fault repaired before relying on the vehicle.
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.