How to Diagnose and Solve C1187 Brake Fluid Level Sensor Input Open Circuit Issues

As a car enthusiast, there’s nothing more satisfying than rolling up your sleeves and getting your hands dirty to fix a car problem. Today, we’re going to tackle a common issue that many car owners face – the C1187 Brake Fluid Level Sensor Input Open Circuit issue.

Understanding the C1187 Brake Fluid Level Sensor Input Open Circuit Issue

Before we dive into the solution, let’s first understand what this issue is all about. The C1187 code is a diagnostic trouble code (DTC) that indicates a problem with the brake fluid level sensor input circuit. This sensor is responsible for monitoring the level of brake fluid in your car. If the circuit is open, it means the electrical path that the sensor uses to send signals to the car’s computer is interrupted.

Signs of a C1187 Brake Fluid Level Sensor Input Open Circuit Issue

How do you know if your car is experiencing this issue? Here are some signs to look out for:

1. **Brake warning light on the dashboard**: This is the most common sign. If the brake fluid level sensor input circuit is open, the brake warning light on your dashboard will illuminate.

2. **Poor braking performance**: If the brake fluid level is low, your car’s braking performance may be affected. You might notice that the brakes are not as responsive as they should be.

3. **Unusual noises when braking**: If you hear a squealing or grinding noise when you apply the brakes, it could be a sign of low brake fluid level.

Diagnosing the C1187 Brake Fluid Level Sensor Input Open Circuit Issue

Now that we know what to look out for, let’s move on to diagnosing the issue. Here’s a step-by-step guide:

Step 1: Check the Brake Fluid Level

The first step is to check the brake fluid level in your car. If the level is low, it could be the reason why the brake fluid level sensor input circuit is open.

Step 2: Inspect the Brake Fluid Level Sensor

Next, inspect the brake fluid level sensor. Look for any signs of damage or corrosion. If the sensor is damaged, it might not be able to send signals to the car’s computer, resulting in an open circuit.

Step 3: Test the Brake Fluid Level Sensor

To confirm if the sensor is working properly, you can test it using a multimeter. If the sensor is faulty, it will need to be replaced.

Solving the C1187 Brake Fluid Level Sensor Input Open Circuit Issue

Once you’ve diagnosed the issue, it’s time to solve it. Here’s how:

Step 1: Replace the Brake Fluid

If the brake fluid level is low, the first step is to replace the brake fluid. Make sure to use the correct type of brake fluid for your car.

Step 2: Clean or Replace the Brake Fluid Level Sensor

If the sensor is dirty or corroded, clean it using a contact cleaner. If the sensor is damaged or faulty, replace it with a new one.

Step 3: Reset the Car’s Computer

After replacing the brake fluid and cleaning or replacing the sensor, reset the car’s computer to clear the C1187 code. You can do this by disconnecting the battery for a few minutes and then reconnecting it.

Conclusion

Fixing a C1187 Brake Fluid Level Sensor Input Open Circuit issue might seem daunting, but with the right knowledge and tools, it’s a task you can handle. Remember, safety should always be your top priority when working on your car. Always wear protective gear and work in a well-ventilated area.

FAQs

1. What causes a C1187 Brake Fluid Level Sensor Input Open Circuit issue?

This issue is usually caused by a low brake fluid level, a damaged or faulty brake fluid level sensor, or a problem with the wiring or connectors in the sensor circuit.

2. Can I drive my car with a C1187 Brake Fluid Level Sensor Input Open Circuit issue?

While it might be possible to drive your car with this issue, it’s not recommended. The brake fluid level is crucial for your car’s braking performance. If the level is low, it could affect your ability to stop the car, posing a safety risk.

3. How much does it cost to fix a C1187 Brake Fluid Level Sensor Input Open Circuit issue?

The cost to fix this issue can vary depending on the cause. If you need to replace the brake fluid or the sensor, the cost could range from $50 to $200. However, if the issue is due to a problem with the wiring or connectors, the cost could be higher.