* Worn Ignition Switch: This is the most common cause. Over time, the internal contacts within the ignition switch wear down, making poor contact. Jiggling the key can temporarily restore contact, allowing the car to start.
* Loose or Corroded Wiring: The wires connecting the ignition switch to other components (like the starter solenoid) can become loose, corroded, or broken. Movement from jiggling the key might temporarily improve the connection.
* Faulty Ignition Cylinder: While less common than a worn switch, the ignition cylinder itself (the part the key goes into) can develop internal problems that affect the switch's operation.
* Damaged Ignition Switch Connector: The connector that plugs into the ignition switch can become corroded or damaged, leading to intermittent contact.
* Faulty Starter Solenoid: While the problem might *seem* like the ignition switch, a failing starter solenoid could also cause intermittent starting issues. Jiggling the key might momentarily improve the connection, making it seem like the switch is at fault. (Testing the solenoid directly is necessary to determine this).
It's crucial to diagnose the exact cause. Simply continuing to jiggle the key is a dangerous temporary fix. A failing ignition switch can lead to complete failure, leaving you stranded. The risk of fire is also increased with faulty wiring in the ignition system. It's best to have a qualified mechanic diagnose and repair the issue.
