* Faulty starter solenoid: The starter solenoid is an electrical component that is responsible for engaging the starter motor with the flywheel. If the solenoid fails, it can cause the starter motor to run continuously.
* Ignition switch: If the ignition switch is not working properly, it can cause the starter to run continuously.
* Worn ignition cylinder: The ignition cylinder is a mechanical component that is responsible for turning the key and activating the ignition switch. If the ignition cylinder is worn, it can cause the starter to run continuously.
* Faulty wiring: If the wiring in the starter circuit is faulty, it can cause the starter to run continuously.
To diagnose the problem, you will need to start by checking the starter solenoid. If the solenoid is not working properly, you will need to replace it. If the solenoid is working properly, you will need to check the ignition switch and the wiring in the starter circuit.
Here are some additional things you can try:
* Disconnect the battery and then reconnect it. This can sometimes reset the electrical system and stop the starter from running continuously.
* Try starting the engine in neutral. This can help to rule out a problem with the transmission or the park/neutral safety switch.
* Inspect the starter motor for any damage. If the starter motor is damaged, it will need to be replaced.