What causes a high pitch noise when you turn the key in the ignition?

A high-pitched noise when turning the key in the ignition can be caused by several factors, including a failing starter motor, a weak or dead battery, or issues with the ignition system. If the battery doesn't have enough power, the starter may struggle to engage, leading to a whirring or squealing sound. Additionally, worn-out or damaged components in the starter or ignition system can also produce unusual noises when attempting to start the vehicle. It's advisable to have the vehicle inspected to identify and resolve the underlying issue.