DTC P0608 Control Module VSS Output “A” Malfunction

Encountering DTC P0608 implies a potential issue with the Control Module Vehicle Speed Sensor (VSS) Output “A.” Understanding the implications, possible causes, symptoms, diagnostic steps, and corrective actions associated with this code is vital for effective resolution.

1. What Does P0608 Code Mean?

P0608 signifies a malfunction in the control module’s output for the vehicle speed sensor. This error code occurs when the control module, responsible for managing various vehicle functions, experiences difficulties in producing or managing output related to the VSS.

2. What Are the Causes of DTC P0608?

Several factors might lead to DTC P0608:

  • Faulty Control Module: Issues within the control module responsible for VSS output, such as internal faults or electrical problems.
  • Wiring or Connector Issues: Damage, corrosion, or poor connections in the wiring or connectors related to the VSS output.
  • VSS Malfunction: Problems within the Vehicle Speed Sensor impacting its communication with the control module.

3. What Are the Symptoms of DTC P0608?

Observable symptoms linked to DTC P0608 may include:

  • Malfunction Indicator Lamp: Illumination of the check engine light or other warning indicators indicating issues with the control module’s VSS output.
  • Speedometer Issues: Inaccurate or fluctuating readings on the speedometer due to irregular VSS output.

4. How to Diagnose DTC P0608?

Accurate diagnosis involves systematic procedures:

  • OBD-II Scanner: Use a scanner to retrieve the trouble code and related codes, allowing for a comprehensive assessment.
  • Inspect Control Module: Examine the control module for signs of damage, corrosion, or internal faults affecting VSS output.
  • Check Wiring and Connectors: Inspect the wiring and connectors associated with the VSS for any faults or poor connections.

5. How to Fix DTC P0608 Problem?

Resolving DTC P0608 entails specific steps:

  • Control Module Replacement: If the control module responsible for VSS output is faulty, replacing it might be necessary to restore proper functionality.
  • Repair Wiring or Connectors: Address any issues with damaged wiring or connectors to ensure proper communication with the VSS.
  • VSS Replacement: If the Vehicle Speed Sensor itself is faulty, replacing it can rectify the issue with VSS output.


DTC P0608, indicating a Control Module VSS Output “A” Malfunction, points to potential issues within the control module’s output related to the Vehicle Speed Sensor. Understanding the code’s implications, potential causes, observable symptoms, systematic diagnostic procedures, and effective resolution methods is crucial in addressing and rectifying this issue. Fixing DTC P0608 ensures proper VSS output, contributing to accurate speed readings and optimal vehicle functionality.