* Parking Brake Lever Not Fully Released: This is the simplest explanation. Carefully check that the parking brake lever is completely released. Sometimes, it can seem released but isn't quite all the way. Try gently rocking the car back and forth while releasing the lever to ensure it's fully disengaged.
* Parking Brake Switch: This switch is usually located near the parking brake lever mechanism. It senses when the lever is engaged or released. If the switch is faulty (stuck, broken, or internally shorted), it will incorrectly signal the light to stay on, even when the brake is released. This is a common cause.
* Low Brake Fluid: Although seemingly unrelated, low brake fluid can trigger the parking brake light. The brake system monitors fluid level, and if it's low, the light serves as a warning. Check your brake fluid reservoir (usually a clear plastic container near the master cylinder under the hood). Low fluid suggests a leak somewhere in the braking system, which needs immediate attention.
* Brake System Problem: Other brake-related issues can also illuminate the parking brake light. This could include issues with your brake pressure sensor or other components within the braking system. These require a mechanic to diagnose accurately.
* Wiring Problem: A short circuit or damaged wire in the parking brake light circuit can cause it to stay on. This is less common but possible.
What to do:
1. Check the Parking Brake Lever: This is the first and easiest thing to check.
2. Check Brake Fluid: Inspect the brake fluid reservoir. If it's low, don't drive the car until the leak is found and fixed.
3. Have it Professionally Diagnosed: If the problem persists after checking the lever and brake fluid, it's best to take your Impala to a mechanic. They have the tools and expertise to diagnose the faulty switch, wiring issue, or more serious brake problems. Ignoring a consistently lit parking brake light can be dangerous.
Don't drive your car with the parking brake light constantly on, especially if brake fluid is low. This could indicate a serious safety issue.
