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P2140 Throttle/Pedal Pos Sensor/Switch E / F Voltage Correlation

The OBD2 code P2140 indicates a voltage correlation issue between the throttle position sensor or pedal position sensor E and F, suggesting that the signals from these sensors are not aligning as expected

Definition

The OBD2 code P2140 indicates a voltage correlation issue between the throttle position sensor or pedal position sensor E and F, suggesting that the signals from these sensors are not aligning as expected

Common causes

  • Faulty throttle position sensor
  • Faulty accelerator pedal position sensor
  • Wiring issues (shorts, opens, or corrosion)
  • Poor electrical connections
  • Faulty engine control module (ECM)
  • Incorrectly calibrated sensors
  • Mechanical issues with the throttle body
  • Software issues or updates needed for the ECM

Common misdiagnoses

  • Faulty throttle position sensor
  • Faulty accelerator pedal position sensor
  • Wiring issues or shorts in the harness
  • Faulty engine control module (ECM)
  • Vacuum leaks
  • Faulty mass air flow sensor
  • Fuel delivery issues
  • Ignition system problems
  • Transmission issues
  • Other throttle body malfunctions

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 Wiring and Connectors

    Visually inspect the wiring and connectors associated with the throttle position sensor and pedal position sensor. Look for signs of damage, corrosion, or loose connections

  3. 3. Ensure that all connectors are securely attached and free of dirt or moisture

  4. 4. Test the Throttle Position Sensor (TPS)

    Use a multimeter to test the TPS for proper voltage and resistance. Compare the readings to the specifications provided in the vehicle’s service manual

  5. 5. Check for smooth operation throughout the entire range of motion

  6. 6. Test the Pedal Position Sensor (PPS)

    Similarly, test the PPS using a multimeter. Ensure that it is functioning correctly and providing the expected voltage readings

  7. 7. Look for any signs of wear or damage

  8. 8. Check for Throttle Body Issues

    Inspect the throttle body for carbon buildup or other obstructions that could affect its operation

  9. 9. Clean the throttle body if necessary, following the manufacturer’s recommendations

  10. 10. Inspect the Electronic Control Unit (ECU)

    Check for any software updates or recalls related to the ECU that may address known issues with throttle control

  11. 11. If the ECU is suspected to be faulty, further diagnostic testing may be required

  12. 12. Perform a Throttle Position Reset

    Some vehicles require a throttle position reset after repairs. This can often be done by disconnecting the battery for a few minutes or using a scan tool to reset the throttle position

  13. 13. Check for Vacuum Leaks

    Inspect the intake system for any vacuum leaks that could affect the throttle response and sensor readings

  14. 14. Test the Accelerator Pedal Assembly

    If applicable, test the accelerator pedal assembly for proper operation. This may involve checking the position sensors within the assembly

  15. 15. Clear Codes and Test Drive

    After performing repairs or adjustments, clear the trouble codes using the OBD-II scanner and take the vehicle for a test drive to see if the code returns.1

  16. 16. Consult Technical Service Bulletins (TSBs)

    Check for any TSBs related to the P2140 code for your specific make and model. Manufacturers may have issued guidance on common issues and fixes.1

  17. 17. Seek Professional Help

    If the issue persists after performing these steps, it may be necessary to consult a professional mechanic or technician who has experience with electronic throttle control systems. By following these troubleshooting steps, you can systematically identify and resolve the underlying issue causing the P2140 code