Common Causes:
* Steering Wheel Lock: This is the most frequent culprit. The steering wheel is mechanically locked to prevent theft, and if the wheel isn't perfectly straight, the key won't turn. Try gently jiggling the steering wheel while turning the key.
* Worn Ignition Switch: The ignition switch itself might be worn or damaged. Over time, the tumblers inside can become worn, making it difficult for the key to engage properly.
* Broken or Damaged Key: A bent, worn, or damaged key won't turn smoothly. Try a spare key if you have one.
* Shift Lever Not in Park (Automatic): Make absolutely sure the transmission is fully in Park (P). A slight misalignment can prevent the key from turning.
* Debris in the Ignition Cylinder: Dirt, dust, or other debris can get lodged in the ignition cylinder, hindering the key's movement.
Less Common but Possible Causes:
* Faulty Ignition Lock Cylinder: The entire cylinder might need replacing. This is more serious and requires professional attention.
* Electrical Issues: While less likely to directly cause the key to *stick*, electrical problems *might* prevent the ignition from releasing the key. A malfunctioning ignition switch could be part of this.
* Steering Column Issues: Problems with the steering column itself, such as damage or binding, could interfere with the locking mechanism.
Troubleshooting Steps:
1. Check the Steering Wheel: Gently wiggle the steering wheel while trying to turn the key.
2. Check the Transmission: Ensure the car is firmly in Park (P).
3. Try a Spare Key: If you have one, use it to see if the problem is with the key itself.
4. Use Lubricant (Caution): *Very carefully* apply a small amount of graphite lubricant (specifically designed for locks) to the key and ignition cylinder. Avoid using WD-40 or other oils as they can attract dirt. *Too much lubricant can make things worse*.
When to Call a Professional:
If none of the above steps work, you should call a locksmith or a qualified mechanic. Forcing the key can cause further damage to the ignition system, leading to more expensive repairs. They have specialized tools and expertise to diagnose and repair the problem safely.
