1. Identify the Problem:
* Is the key turning at all? If the key doesn't turn, the problem is likely a mechanical binding within the lock cylinder.
* Does the key turn but the trunk doesn't open? The problem might be in the linkage between the lock cylinder and the trunk latch.
* Is the trunk release cable broken inside the car? Try the internal trunk release (if your model has one). If that doesn't work, the cable may be broken.
2. Solutions based on the problem:
* Key won't turn:
* Graphite Powder: This is the best lubricant for locks. Apply a small amount of dry graphite powder (available at hardware stores) into the keyhole. Work the key gently back and forth several times.
* Lock De-icer: If it's cold outside, a lock de-icer spray can help thaw any frozen moisture.
* Professional Lock Smith: If graphite doesn't work, the lock cylinder may be worn or damaged. A locksmith can diagnose and potentially repair or replace it.
* Key turns, but trunk doesn't open:
* Check the linkage: Access the trunk release mechanism from inside the car (usually involves removing some interior panels). Manually operate the mechanism to see if it's jammed or broken. This often requires patience and some mechanical aptitude. You might need to consult a repair manual specific to your 2001 Dodge Neon.
* Lubricate the linkage: If the linkage is moving freely, apply a light lubricant (like silicone spray, NOT WD-40) to the moving parts.
* Internal Trunk Release Doesn't Work:
* Check the cable: Accessing the cable usually requires removing some interior panels. Look for breaks or disconnections in the cable. Repair or replace the cable as needed. This is likely the most common issue.
3. Important Considerations:
* Avoid force: Never use excessive force on the lock. You could damage the lock cylinder or the linkage.
* Repair manual: A repair manual specific to your 2001 Dodge Neon will be extremely helpful in diagnosing and repairing the problem. You can often find these online (PDFs) or at auto parts stores.
* Professional help: If you're uncomfortable working on your car yourself, don't hesitate to call a locksmith or a mechanic. The cost of professional repair will be far less than the cost of replacing parts you've accidentally damaged.
Remember to be patient and methodical. Proper diagnosis is key to fixing the problem efficiently.
