C1137 DTC Code: Everything You Need to Know


In the world of automotive diagnostics, trouble codes play a crucial role in identifying and resolving issues with vehicles. One such code is the C1137 DTC code. This article will provide you with a comprehensive understanding of what this code is, what it signifies, and how it can be addressed. So, let’s dive deep into the details!

Understanding the C1137 DTC Code

The C1137 DTC code is an important diagnostic trouble code that relates to a specific component or system within a vehicle. This code is commonly observed in various makes and models, including both domestic and foreign vehicles. It refers to an issue in the Brake Power Assisted System, often known as the Brake Booster. When the code is triggered, it indicates a fault in the hydraulic pump or a potential loss of pressure in the brake system.

Symptoms of a C1137 DTC Code

Recognizing the symptoms associated with the C1137 DTC code is crucial in diagnosing and resolving the underlying issue. Some common symptoms of this code include:

  1. Illuminated ABS warning light: The Anti-lock Braking System (ABS) warning light on the instrument cluster may illuminate when the C1137 DTC code is present.

  2. Increased pedal effort: Drivers may experience a noticeable increase in the effort required to depress the brake pedal.

  3. Reduced braking performance: The vehicle may exhibit diminished braking performance, taking longer to come to a complete stop or requiring increased brake pedal pressure.

Causes of the C1137 DTC Code

To effectively troubleshoot and resolve the C1137 DTC code, it is essential to understand the potential causes behind its triggering. Here are some common causes:

  1. Brake hydraulic pump failure: The hydraulic pump responsible for generating pressure in the brake system may fail, resulting in the C1137 DTC code.

  2. Brake booster pressure sensor malfunction: A malfunctioning pressure sensor within the brake booster system can also trigger this code, leading to issues with pressure regulation.

  3. Brake fluid leakage: Any leakage in the brake fluid lines or components can result in low pressures within the system, thus leading to the C1137 DTC code.

Resolving the C1137 DTC Code

Addressing the C1137 DTC code requires proper diagnosis and appropriate repairs. Here are some steps that can be taken to resolve this issue:

  1. Conduct a visual inspection: Start by visually inspecting the brake fluid lines and brake booster components for any signs of leakage or damage. Ensure that the brake fluid reservoir is at the correct level.

  2. Test the brake hydraulic pump: Utilize a suitable diagnostic tool to test the brake hydraulic pump for proper functionality. If the pump is found to be faulty, it should be replaced.

  3. Check the brake booster pressure sensor: Test the pressure sensor within the brake booster to ensure it is providing accurate readings. If it is faulty, it should be replaced to rectify the C1137 DTC code.

  4. Repair leaking brake components: If any leaks are detected during the visual inspection, repair or replace the damaged brake fluid lines or components accordingly to eliminate the pressure loss issue.

Frequently Asked Questions (FAQs)

  1. Can I continue driving my vehicle with the C1137 DTC code?

    It is not recommended to continue driving the vehicle when this code is present. Reduced braking performance can pose a safety risk, and resolving the issue should be a priority.

  2. Can I resolve the C1137 DTC code on my own?

    While it is possible to perform basic checks, such as inspecting for leaks or ensuring proper brake fluid levels, resolving the code may require advanced diagnostic tools and expertise. It is advisable to seek professional assistance.

  3. Is the C1137 DTC code specific to a certain vehicle make or model?

    No, the C1137 DTC code can be triggered in various vehicle makes and models. However, it is more commonly observed in vehicles equipped with electronically controlled brake systems.


In a nutshell, the C1137 DTC code relates to a fault within the Brake Power Assisted System, specifically involving the brake booster. Recognizing the symptoms, determining the causes, and taking appropriate steps to resolve the code are essential for maintaining vehicle safety and optimal braking performance. Remember, seeking professional help is highly recommended for accurate diagnosis and repair.

About author


Meet Sam Mitchell, your experienced and reliable guide in the complex world of car fault codes. With a robust career spanning over 15 years as a professional car mechanic, John has the skills, knowledge, and practical experience to help you navigate car fault issues with confidence.


Leave a Reply