00655 DTC Code: Explained and Troubleshooting Guide


When it comes to diagnosing vehicle issues, the Diagnostic Trouble Code (DTC) plays a crucial role. In this SEO-friendly article, we will delve into the specifics of the 00655 DTC code, its meaning, and potential troubleshooting steps. Whether you are a car enthusiast or a professional mechanic, understanding this code will help you identify and resolve related problems effectively.

Understanding DTC Codes

DTC codes are alphanumeric codes generated by a vehicle’s onboard diagnostics system. These codes provide valuable information about specific issues or malfunctions within various systems of the vehicle. Each DTC code comprises five digits, with the first digit typically indicating the general area of the problem.

The 00655 DTC Code

The 00655 DTC code is a specific code related to the vehicle’s turbocharger or supercharger. This code signifies that there is an issue with the boost pressure regulation circuit. When this code is detected, the vehicle’s engine control unit (ECU) illuminates the check engine light to alert the driver of a problem.

Possible Causes of the 00655 DTC Code

To successfully troubleshoot the 00655 DTC code, it is essential to identify the potential causes of this issue. Here are some possible reasons why this code may appear:

  1. Faulty Boost Pressure Sensor: The boost pressure sensor is responsible for monitoring and transmitting data about the boost pressure to the ECU. If this sensor fails or provides inaccurate readings, it may trigger the 00655 DTC code.

  2. Leaking or Damaged Vacuum Lines: Vacuum lines play a crucial role in delivering the necessary pressure to the turbocharger or supercharger. Any leaks or damages in these lines can lead to improper boost pressure regulation, resulting in the DTC code.

  3. Malfunctioning Turbocharger/Supercharger: The turbocharger or supercharger itself may experience mechanical issues or failure, leading to problems with boost pressure regulation. These components need to be inspected and tested thoroughly to determine if they are causing the 00655 DTC code.

Troubleshooting the 00655 DTC Code

Once the potential causes are identified, it’s time to troubleshoot the issue. Here is a step-by-step guide to addressing the 00655 DTC code:

  1. Inspect Boost Pressure Sensor: Start by visually inspecting the boost pressure sensor and its wiring harness. Look for any signs of damage or loose connections. If any issues are found, repair or replace the sensor as necessary.

  2. Check Vacuum Lines: Carefully examine the vacuum lines connected to the turbocharger or supercharger system. Ensure there are no visible leaks, cracks, or loose fittings. Replace or repair damaged lines to rectify boost pressure regulation problems.

  3. Test Turbocharger/Supercharger: If the previous steps did not resolve the issue, a thorough inspection of the turbocharger or supercharger is required. Consult the vehicle’s service manual or a reputable mechanic to perform comprehensive tests and assessments on these components. Replace or repair any faulty parts accordingly.

Frequently Asked Questions

1. Can I continue driving the vehicle when the 00655 DTC code is present?

It is generally recommended to avoid driving the vehicle for extended periods when the check engine light is illuminated. Continuing to drive with unresolved issues may lead to further damage or potential safety hazards. It is best to address the problem promptly.

2. Can I clear the 00655 DTC code myself?

Yes, the code can be cleared using an OBD-II scanner or diagnostic tool. However, it is crucial to keep in mind that clearing the code does not fix the underlying problem causing it. If the issue persists, the code will likely reappear.

3. Should I attempt to repair the vehicle myself or seek professional help?

The complexity of turbocharger or supercharger systems often requires specialized knowledge and tools. While some basic troubleshooting steps can be performed by vehicle owners, it is generally recommended to consult a professional mechanic for accurate diagnosis and repair.


In summary, the 00655 DTC code indicates a problem with boost pressure regulation in the turbocharger or supercharger system. By understanding the potential causes and following the troubleshooting steps outlined above, you can effectively address this issue and ensure your vehicle’s optimal performance. Remember to prioritize safety and consult a professional if needed.

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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