DTC P006E Turbocharger/Supercharger Boost Control ‘A’ Supply Voltage Circuit Low

DTC P006E is a diagnostic trouble code indicating a low supply voltage in the Turbocharger/Supercharger Boost Control ‘A’ circuit. Understanding and addressing this issue is crucial for maintaining your vehicle’s efficiency and performance. In this article, we’ll delve into the details of DTC P006E, exploring what it means, its potential causes, and how to diagnose and fix this issue effectively.

What is DTC P006E?

The P006E diagnostic trouble code (DTC) signifies that the supply voltage in the Turbocharger/Supercharger Boost Control ‘A’ circuit is lower than the expected range. The Boost Control ‘A’ circuit is responsible for managing the boost pressure generated by the turbocharger or supercharger, which is essential for enhancing engine power and efficiency. When the supply voltage is too low, the boost control system cannot function properly, leading to decreased engine performance and potential drivability issues.

Potential Causes of DTC P006E:

The P006E code is triggered when the ECM detects a low voltage condition in the Boost Control ‘A’ circuit. This can happen due to several reasons:

  • Faulty Boost Control Solenoid: The boost control solenoid may be malfunctioning, causing a low voltage condition.
  • Wiring Issues: Damaged, corroded, or loose wiring or connectors associated with the Boost Control ‘A’ circuit can lead to low voltage.
  • Faulty Boost Control Module: The boost control module itself could be defective, causing incorrect voltage readings.
  • Battery or Charging System Issues: Low voltage from the battery or issues with the alternator can lead to insufficient voltage supply to the boost control circuit.
  • ECU Issues: Although rare, a malfunctioning ECU could incorrectly interpret the voltage signals.

Symptoms of P006E

When the P006E code is set, you might experience the following symptoms:

  • Check Engine Light (CEL) illuminated on the dashboard.
  • Reduced engine performance.
  • Poor acceleration.
  • Potential turbo lag or delayed boost response.

Diagnostic and Repair Procedures for DTC P006E:

Diagnosing and resolving the P006E code requires a systematic approach:

  • Initial Inspection: Connect a diagnostic scanner to the vehicle’s OBD-II port to retrieve the trouble codes, including P006E. Record any additional codes and freeze frame data to understand the conditions under which the code was set.
  • Visual Inspection: Conduct a thorough visual inspection of the Boost Control ‘A’ circuit, including the solenoid, wiring, and connectors. Look for signs of damage, corrosion, or disconnection.
  • Test Battery and Charging System: Use a multimeter to check the voltage output of the battery and alternator. Ensure they are providing adequate voltage. Replace or repair any components that are not functioning correctly.
  • Check Wiring and Connectors: Inspect the wiring and connectors for the Boost Control ‘A’ circuit for any signs of damage, corrosion, or incorrect routing. Repair or replace any damaged wiring as necessary.
  • Test the Boost Control Solenoid: Use a multimeter to test the boost control solenoid’s resistance and voltage output. Compare the readings with the manufacturer’s specifications. Replace the solenoid if it is faulty.
  • Inspect the Boost Control Module: Check the boost control module for any signs of malfunction. Replace the module if it is defective.
  • Check for ECU Issues: Although rare, inspect the ECU for any potential faults or software issues that could cause incorrect interpretation of voltage signals. Reprogram or replace the ECU if necessary.
  • Clear Codes and Perform Test Drive: After completing the repairs, clear the trouble codes from the vehicle’s memory using the diagnostic scanner. Perform a test drive to ensure the vehicle operates properly and that the P006E code does not return.


Understanding and addressing DTC P006E is essential for maintaining optimal engine performance and boost pressure management. By following these detailed diagnostic and repair procedures, you can effectively address the P006E trouble code, ensuring the Turbocharger/Supercharger Boost Control ‘A’ circuit receives the correct voltage supply. Regular maintenance and careful inspection of the boost control components and wiring can help prevent this code from appearing.

If you found this guide helpful, please share it with fellow automotive enthusiasts and technicians. For more detailed guides and tips on car maintenance and repair, visit our website.