WOMS
P code powertrain High severity

P0223 Throttle/Pedal Position Sensor/Switch B Circuit High Input

The OBD2 code P0223 indicates that the Throttle/Pedal Position Sensor or Switch B is sending a high voltage signal to the engine control module, which is outside the expected range

Definition

The OBD2 code P0223 indicates that the Throttle/Pedal Position Sensor or Switch B is sending a high voltage signal to the engine control module, which is outside the expected range

Common causes

  • Faulty throttle position sensor (TPS)
  • Damaged wiring or connectors
  • Short circuit in the throttle position sensor circuit
  • Corroded connectors
  • Faulty engine control module (ECM)
  • Poor ground connection
  • Malfunctioning accelerator pedal position sensor
  • Software issues in the ECM

Common misdiagnoses

  • Throttle Position Sensor (TPS) failure
  • Accelerator Pedal Position Sensor failure
  • Wiring issues or shorts in the circuit
  • Engine Control Module (ECM) malfunction
  • Faulty connectors or terminals
  • Vacuum leaks
  • Mass Air Flow (MAF) sensor issues
  • Intake air temperature sensor problems
  • Fuel delivery issues
  • Ignition system problems

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 Throttle Position Sensor (TPS)

  3. 3. Locate the throttle position sensor and visually inspect it for any signs of damage, corrosion, or loose connections

  4. 4. Ensure that the wiring harness and connectors are secure and free from dirt or moisture

  5. 5. Test the Throttle Position Sensor

  6. 6. Use a multimeter to test the TPS. Check the voltage output at the sensor while moving the throttle pedal. The voltage should change smoothly as the pedal is pressed and released

  7. 7. Compare the readings to the manufacturer's specifications to determine if the sensor is functioning correctly

  8. 8. Check the Pedal Position Sensor

  9. 9. Similar to the TPS, inspect and test the pedal position sensor for proper operation. Ensure that it is not sending a high voltage signal when the pedal is not pressed

  10. 10. Inspect Wiring and Connectors

  11. 11. Look for damaged, frayed, or shorted wires in the circuit between the throttle position sensor and the engine control module (ECM)

  12. 12. Check for any loose or corroded connectors that could cause poor electrical contact

  13. 13. Check for Ground Issues

  14. 14. Ensure that the ground connections for the throttle and pedal position sensors are secure and free from corrosion. A poor ground can lead to erratic sensor readings

  15. 15. Examine the ECM

  16. 16. In rare cases, the engine control module itself may be faulty. If all other components check out, consider having the ECM tested or reprogrammed

  17. 17. Clear the Codes and Test Drive

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

  19. 19. Consult Technical Service Bulletins (TSBs)

  20. 20. Check for any TSBs related to the P0223 code for your specific vehicle make and model. Manufacturers may have issued guidance on common issues and fixes

  21. 21. Seek Professional Help

  22. 22. If you are unable to resolve the issue after these steps, it may be best to consult a professional mechanic for further diagnosis and repair. By following these troubleshooting steps, you should be able to identify and address the cause of the P0223 code