C1155 code — how to fix error fast

Problems with the code C1155 and similar OBD2 readings are inevitable for all drivers at some point in their car’s lifespan. This code may not be dangerous for your car’s vital components, but it can be pretty dire for your driving safety.

To help you prevent any safety concerns, our team wanted to give you a complete overview of the C1155 code meaning and give you an overall idea of what you can expect to be the cause of the issue. This guide will also help you find a perfect method of diagnosing and fixing the issue in your vehicle, so stay tuned for detailed instructions.

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What does the C1155 code mean?

The C1155 code indicates a problem with the ABS system’s speed sensor circuit. The ABS system is responsible for preventing the wheels from locking up during hard braking, ensuring that the driver maintains control of the vehicle. When the ABS system detects a problem with the speed sensor circuit, it illuminates the code on the dashboard.

The consequences of ignoring the C1155 code can be severe. If the ABS system fails, the wheels may lock up during hard braking, leading to loss of control of the vehicle and potentially causing an accident. Other symptoms of the code include the ABS light staying on, the speedometer not working correctly, or the vehicle going into limp mode.

What causes the C1155 code?

Several factors can cause the C1155 code, including a faulty speed sensor, damaged wiring, or a malfunctioning ABS control module. Here is a detailed description of each potential cause:

Faulty speed sensor

The most common cause of the C1155 code is a faulty speed sensor. The speed sensor is responsible for detecting the wheel’s speed and sending the information to the ABS control module. If the speed sensor is damaged or malfunctioning, it can cause the code to appear on the dashboard.

Damaged wiring

Another common cause of this code is damaged wiring. If the wiring that connects the speed sensor to the ABS control module is damaged, it can cause a disruption in the speed sensor circuit, leading to the C1155 code.

Malfunctioning ABS control module

Lastly, a malfunctioning ABS control module can also cause the C1155 code. If the ABS control module is not functioning correctly, it may not receive the information from the speed sensor, causing the code to appear on the dashboard.

Which car models does the C1155 code affect the most?

The C1155 code can affect several car models, but it is prevalent in Ford, Mazda, and Mercury vehicles. This is because these vehicles use similar ABS systems that are prone to the C1155 code, so let’s take a look at some commonly affected vehicles:

• Ford Focus: The Focus is one of the most popular compact cars on the market, and it’s also one of the models that is most commonly affected by the C1155 code. This is likely due to the fact that it has been in production for many years and has had multiple generations with different ABS systems.
• Ford Escape: The Escape is another Ford model that is prone to experiencing an error code. This compact SUV has been around since 2000 and has undergone several redesigns over the years, which may contribute to its susceptibility to this issue.
• Mazda Tribute: The Tribute is a compact crossover SUV that was produced by Mazda from 2000 to 2011. It shares many components with the Ford Escape, including its ABS system, which could explain why it is also susceptible to this code.

How to diagnose the C1155 code

Diagnosing the C1155 code can be challenging, but it is essential to determine the root cause of the problem. Here is an overview of the steps to diagnose the code:

Check the ABS system fuse

The first step in diagnosing the C1155 code is to check the ABS system fuse. A blown fuse can cause the code to appear on the dashboard, which is why simply replacing the fuse can restore the ABS system’s function.

Inspect the speed sensor

The next step is to inspect the speed sensor. Check for any visible damage or wear and tear. If the sensor looks damaged, it may need to be replaced since it helps the system operate and engage thanks to the wheels’ speed readings.

Use an OBD2 tool

A diagnostic tool can help diagnose the code accurately. The tool can read the code and provide information on what is causing the problem.

How to fix the C1155 code

Once you have diagnosed the C1155 code, it is time to fix it. Here is an overview of the steps to fix the code:

Replace the speed sensor

If the speed sensor is faulty, it may need to be replaced. A new speed sensor can cost between $50 and $150, depending on the make and model of your vehicle.

Repair damaged wiring

Since damaged wiring can affect the speed sensor’s performance or the ABS control module, checking the wiring and repairing it in case of damage can help remove the code.

Replace the ABS control module

If the ABS control module is malfunctioning, it may need to be replaced. The cost of replacing the ABS control module can range from $500 to $1,000, depending on the make and model of your vehicle.

How to prevent the C1155 code

Preventing the C1155 code is essential to ensure the safety and performance of your vehicle. Here are some preventative measures you can take:

• Regular ABS system maintenance
• Properly checking the brake lines and sensors
• Making sure that there’s enough braking fluid in a hydraulic system

By taking these simple steps, you can make sure that everything is in perfect order with your car’s ABS system and that nothing will happen to affect the code’s re-emergence.

Our take

Overall, the C1155 code is a fault code that can indicate a problem with the ABS system. By following the preventative measures outlined in this article, as well as ways of diagnosing and fixing the code in your car, you can make sure to keep your vehicle safe.