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P006E Turbocharger/Supercharger Boost Control "A" Supply Voltage Circuit Low

The OBD2 code P006E indicates that there is a low voltage issue in the supply circuit for the turbocharger or supercharger boost control system, which may affect its performance and operation

Definition

The OBD2 code P006E indicates that there is a low voltage issue in the supply circuit for the turbocharger or supercharger boost control system, which may affect its performance and operation

Common causes

  • Faulty turbocharger/supercharger boost control sensor
  • Damaged wiring or connectors in the boost control circuit
  • Short circuit to ground in the boost control circuit
  • Open circuit in the boost control circuit
  • Faulty engine control module (ECM)
  • Low battery voltage or poor battery connections
  • Faulty boost control solenoid
  • Vacuum leaks in the intake system

Common misdiagnoses

  • Faulty turbocharger/supercharger
  • Bad boost pressure sensor
  • Vacuum leaks
  • Faulty wiring or connectors
  • Malfunctioning engine control module (ECM)
  • Incorrectly calibrated mass air flow (MAF) sensor
  • Throttle body issues
  • Fuel delivery problems
  • Ignition system faults
  • Exhaust system restrictions

Troubleshooting steps

  1. 1. Check for Additional Codes

    Use an OBD-II scanner to check for any other related trouble codes. This can provide more context and help identify if there are multiple issues

  2. 2. Inspect the Wiring and Connectors

    Visual Inspection: Look for any damaged, frayed, or corroded wires and connectors related to the turbocharger/supercharger boost control system

  3. 3. Connector Condition

    Ensure that all connectors are securely attached and free of dirt or corrosion

  4. 4. Test the Voltage Supply

    Voltage Check: Use a multimeter to check the voltage at the boost control solenoid or actuator. Compare the reading to the specifications in the vehicle’s service manual

  5. 5. Ground Check

    Ensure that the ground connections are solid and that there is no excessive resistance in the ground circuit

  6. 6. Inspect the Boost Control Solenoid/Actuator

    Functionality Test: If applicable, test the boost control solenoid or actuator for proper operation. This may involve applying voltage directly to see if it actuates correctly

  7. 7. Resistance Check

    Measure the resistance of the solenoid/actuator to ensure it is within the manufacturer’s specifications

  8. 8. Check the Engine Control Module (ECM)

    ECM Functionality: Ensure that the ECM is functioning properly and is not causing the low voltage issue. This may involve checking for software updates or reprogramming if necessary

  9. 9. Ground and Power Supply

    Verify that the ECM is receiving proper power and ground

  10. 10. Inspect Related Components

    Vacuum Lines: Check for any leaks in vacuum lines that may affect the boost control system

  11. 11. Intercooler and Intake System

    Inspect for any blockages or leaks that could impact boost pressure

  12. 12. Clear Codes and Test Drive

    After performing the above checks and repairs, clear the trouble codes using the OBD-II scanner

  13. 13. Take the vehicle for a test drive to see if the code reappears

  14. 14. Professional Diagnosis

    If you are unable to resolve the issue, consider seeking help from a professional mechanic or technician who has experience with turbocharged or supercharged systems. By following these steps, you should be able to identify the cause of the P006E code and take appropriate action to resolve the issue