1. Check the Brake Pedal:
* Is the brake pedal fully depressed? Sometimes, the pedal might not be going down far enough to fully activate the interlock. Try pressing firmly and see if the lever releases.
* Brake Pedal Travel: If the pedal feels spongy or goes almost to the floor, there might be a brake system issue (low brake fluid, air in the lines, or worn brake components). This is a *serious* safety concern and needs immediate attention from a mechanic. Do not drive the car until this is addressed.
2. Check the Brake Light Switch:
* Location: The brake light switch is usually located near the brake pedal. It's a small switch that's activated when you press the brake pedal. This switch signals the interlock system.
* Testing: You might be able to test the switch with a multimeter (if you're comfortable with electrical work) to see if it's sending a signal when the brake is pressed. However, this requires some electrical knowledge.
* Replacement: If the switch is faulty, it's relatively inexpensive and easy to replace (though you'll need the correct replacement part).
3. Inspect the Shift Interlock Cable/Mechanism (More Involved):
* Access: Accessing the interlock mechanism might require removing parts under the dash or around the gear selector. Again, a repair manual will be vital here.
* Adjustment/Lubrication: The cable might be stretched, jammed, or need lubrication. However, adjusting or working on the interlock mechanism is risky if you're not familiar with the system. Incorrect adjustment could damage the mechanism.
* Broken Parts: There's a possibility of a broken component within the interlock system itself. This often requires replacing the entire mechanism, which is a more complex repair.
4. Other Potential Issues (Less Likely):
* Electrical Problem: A short circuit or other electrical malfunction in the interlock system's wiring could prevent it from working correctly.
* Damaged Shift Lever: Though less common, the lever itself or its internal components could be the source of the problem.
Important Considerations:
* Safety First: Never attempt to force the gear shift lever. This could damage the transmission or other components.
* Repair Manual: A service manual for your specific 2001 Ford Taurus is highly recommended. It will show you diagrams and step-by-step instructions for accessing and repairing the interlock system.
* Professional Help: If you're not comfortable working on your car's electrical or mechanical systems, it's best to take it to a qualified mechanic. The brake system and transmission are crucial for safe operation.
Trying to fix this yourself without proper knowledge could lead to further damage or injury. The brake system's safety aspect alone makes seeking professional assistance strongly recommended, especially if you suspect brake fluid issues.
