B2355 DTC Code: Understanding the Causes and Solutions


The B2355 Diagnostic Trouble Code (DTC) is a unique alphanumeric code that indicates a specific issue within a vehicle’s onboard diagnostic system. In this comprehensive guide, we will dive deep into the intricacies of the B2355 DTC code, including its definition, possible causes, and potential solutions. So, let’s begin our journey to understand this code and its implications.

What is a B2355 DTC Code?

The B2355 DTC code is a generic code that represents a fault in the vehicle’s anti-lock braking system (ABS). Typically, this code is associated with a malfunction in the ABS control module or its related components. When the system detects an issue, it triggers the B2355 code and activates the ABS warning light on the vehicle’s dashboard.

Common Causes of B2355 DTC Code:

  1. Faulty ABS Control Module: One of the primary culprits behind the B2355 DTC code is a malfunctioning ABS control module. This important component is responsible for the overall functioning of the ABS system, and any defect in it can trigger the code.

  2. Wheel Speed Sensor Issues: The ABS system relies on accurate wheel speed data to operate optimally. If any of the wheel speed sensors become faulty or fail, it can generate the B2355 code. Corroded sensors or damaged wiring connections are common causes.

  3. Electrical Problems: Like many other vehicle systems, the ABS system is vulnerable to electrical issues. Loose connections, open circuits, or short circuits within the ABS wiring harness can result in the B2355 DTC code.

  4. Hydraulic Pump Failure: In some cases, a malfunctioning hydraulic pump can be the root cause of the B2355 code. The pump’s failure to maintain adequate hydraulic pressure within the ABS system can trigger the code.

  5. Other Possible Causes: While less common, other factors such as ABS solenoid valve failure, damaged ABS relays, or low brake fluid levels can also contribute to the appearance of the B2355 code.

Symptoms of B2355 DTC Code:

Identifying the symptoms associated with the B2355 DTC code is crucial for prompt diagnosis and repair. Here are some common signs that may indicate the presence of this code:

  • Illumination of the ABS warning light on the dashboard.
  • ABS system deactivation, leading to potential risks during sudden braking.
  • Unusual noises or vibrations from the ABS system.
  • Reduced brake effectiveness or sporadic braking issues.

It is important to remember that these symptoms may vary depending on the make and model of the vehicle.

Diagnosing B2355 DTC Code:

Diagnosing the B2355 DTC code can be a complex process, often requiring advanced diagnostic tools and expertise. It is advisable to seek professional assistance from a qualified mechanic or an automotive service center. They will employ several diagnostic steps, including:

  1. Scanning the System: The mechanic will use a specialized diagnostic scanner to retrieve the trouble codes stored in the vehicle’s ABS control module. The B2355 code will be identified in the scan results.

  2. Visual Inspection: A thorough visual inspection of the ABS system and its components will be conducted to check for any apparent issues such as damaged wiring or loose connections.

  3. Testing the Wheel Speed Sensors: The mechanic will perform tests to ensure the wheel speed sensors are functioning correctly. This may involve cleaning or replacing the sensors if needed.

  4. Testing the ABS Hydraulic System: The hydraulic pump and other related components will be tested to ascertain their operational status and rule out any hydraulic failure.

Resolving the B2355 DTC Code Issue:

Once the underlying cause of the B2355 code has been identified, appropriate steps can be taken to resolve the issue. Depending on the specific problem, the following solutions may be recommended:

  1. Replacing the ABS Control Module: If the ABS control module is determined to be faulty, replacing it with a new or refurbished unit may be necessary.

  2. Repairing or Replacing Wheel Speed Sensors: In case of faulty wheel speed sensors, repairing or replacing them will restore proper functionality to the ABS system.

  3. Fixing Electrical Issues: Any electrical problems, such as damaged wiring or loose connections, should be repaired to ensure a stable and reliable ABS system.

  4. Repairing or Replacing the Hydraulic Pump: In instances where the hydraulic pump is identified as the cause, it may need repair or replacement to restore sufficient hydraulic pressure within the ABS system.

Frequently Asked Questions (FAQs):

Q1: Can I continue driving my vehicle with the B2355 DTC code?

A1: It is generally not recommended to drive with the B2355 code present, as it indicates a fault in the ABS system. This means your vehicle may have compromised braking performance. It is advisable to have the issue resolved promptly by a professional.

Q2: Will resetting the ABS system clear the B2355 DTC code?

A2: While ABS system resets can help clear temporary faults and warning lights, the B2355 DTC code will persist until the underlying problem is resolved. It is crucial to diagnose and repair the root cause to eliminate the code permanently.

Q3: Can I fix the B2355 DTC code myself?

A3: Diagnosing and fixing the B2355 code may require specialized knowledge, tools, and expertise. It is recommended to seek assistance from a qualified mechanic or automotive professional to ensure a proper and accurate repair.


The B2355 DTC code indicates an issue with the ABS system in a vehicle. Understanding the common causes, symptoms, and diagnostic steps associated with this code is crucial for timely and accurate repairs. By seeking professional assistance and implementing the appropriate solutions, you can regain the optimal performance and safety of your vehicle’s ABS system while bidding farewell to the B2355 DTC code.

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.


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