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Solenoids are cylindrical coils of metal wire that carry electric currents. The shifter interlock solenoid ensures you can’t shift from Park to Drive without first applying the brake. The solenoid inside the interlock system is what allows you to move the shifter. When the brake pedal is pressed, the solenoid receives a signal that releases a mechanical lock on the shifter and allows it to be moved. The shifter interlock solenoid also enables the shifter to be moved from Neutral to Reverse and, from Reverse to Park. If the solenoid does not receive the brake pedal signal, the shifter will not be released from its current position. You may not be able to shift out of park, or if you are in drive gear, you may not be able to shift past Neutral back into Reverse or Park.
The shifter interlock solenoid does not require servicing. It is meant to last the lifetime of your car. If your shifter will not come out of Park, or is stuck in gear, have one of our expert mechanics diagnose the system and replace the shifter interlock solenoid if required.
Though it does not present a safety concern, your vehicle is unusable in many cases until the shifter interlock solenoid is repaired. Getting your faulty interlock solenoid replaced is essential for normal car operation.