WOMS
P code powertrain Medium severity

P2023 Intake Manifold Runner Position Sensor/Switch Circuit Intermittent Bank 2

The OBD2 code P2023 indicates an intermittent issue with the intake manifold runner position sensor or switch circuit for bank 2, which may affect the engine's performance and efficiency

Definition

The OBD2 code P2023 indicates an intermittent issue with the intake manifold runner position sensor or switch circuit for bank 2, which may affect the engine's performance and efficiency

Common causes

  • Faulty intake manifold runner position sensor
  • Damaged wiring or connectors
  • Poor electrical connections
  • Vacuum leaks
  • Malfunctioning intake manifold runner control valve
  • Faulty engine control module (ECM)

Common misdiagnoses

  • Faulty intake manifold runner control valve
  • Vacuum leaks
  • Throttle body issues
  • Mass air flow sensor problems
  • Wiring or connector issues
  • Engine control module (ECM) faults
  • Fuel delivery problems
  • EGR system malfunctions
  • Other sensor failures (e.g., MAP sensor)
  • Mechanical issues in the intake manifold

Troubleshooting steps

  1. 1. Check for Additional Codes

    Use an OBD-II scanner to check for any other trouble codes that may be present. This can provide more context and help identify related issues

  2. 2. Inspect the Wiring and Connectors

    Visual Inspection: Check the wiring harness and connectors associated with the intake manifold runner position sensor. Look for signs of damage, corrosion, or loose connections

  3. 3. Connector Condition

    Ensure that the connectors are securely attached and free of dirt or moisture

  4. 4. Test the Intake Manifold Runner Position Sensor

    Resistance Check: Use a multimeter to measure the resistance of the sensor. Compare the readings to the specifications in the vehicle’s service manual

  5. 5. Voltage Check

    With the ignition on (engine off), check the voltage at the sensor connector. Ensure it is receiving the correct voltage as specified in the service manual

  6. 6. Inspect the Intake Manifold and Runner System

    Physical Inspection: Check for any obstructions or damage in the intake manifold and runner system. Ensure that the runners are moving freely and are not stuck

  7. 7. Vacuum Leaks

    Look for any vacuum leaks that could affect the performance of the intake manifold runner system

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

    Software Updates: Ensure that the ECM has the latest software updates, as manufacturers sometimes release updates to fix known issues

  9. 9. Reset the ECM

    Clear the trouble codes and see if the code returns after a test drive. This can help determine if the issue is intermittent

  10. 10. Perform a Functional Test

    If possible, perform a functional test of the intake manifold runner control system. This may involve using a scan tool to command the system and observe the response

  11. 11. Inspect Related Components

    Check other components that may be related to the intake manifold runner system, such as the throttle body, vacuum actuators, and any associated sensors

  12. 12. Consult Technical Service Bulletins (TSBs)

    Look for any TSBs related to the P2023 code for your specific vehicle make and model. Manufacturers may have issued guidance on common issues and fixes

  13. 13. Seek Professional Help

    If the issue persists after performing these steps, consider consulting a professional mechanic or technician who has experience with your vehicle make and model.Conclusion By following these troubleshooting steps, you can systematically identify and address the underlying cause of the P2023 code. Always refer to the specific service manual for your vehicle for detailed specifications and procedures