WOMS
P code powertrain High severity

P0723 Output Speed Sensor Circuit Intermittent

The OBD2 code P0723 indicates that the vehicle's output speed sensor circuit is experiencing intermittent issues, meaning the sensor is not consistently providing accurate speed data to the engine control module

Definition

The OBD2 code P0723 indicates that the vehicle's output speed sensor circuit is experiencing intermittent issues, meaning the sensor is not consistently providing accurate speed data to the engine control module

Common causes

  • Faulty output speed sensor
  • Damaged wiring or connectors
  • Poor electrical connections
  • Faulty transmission control module (TCM)
  • Issues with the vehicle's computer system
  • Transmission fluid issues (low or contaminated fluid)
  • Mechanical problems within the transmission

Common misdiagnoses

  • Faulty Output Speed Sensor
  • Faulty Transmission Control Module (TCM)
  • Wiring issues or damaged connectors
  • Faulty Input Speed Sensor
  • Transmission fluid issues (low or contaminated fluid)
  • Faulty Engine Control Module (ECM)
  • Incorrectly installed or damaged transmission components
  • Wheel speed sensor issues
  • Faulty vehicle speed sensor (VSS)
  • Problems with the transmission itself (internal failure)

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 additional context for the issue

  2. 2. Inspect the Output Speed Sensor

    Locate the output speed sensor (usually found on the transmission)

  3. 3. Check for physical damage, corrosion, or loose connections at the sensor and its wiring harness

  4. 4. Test the Sensor

    Use a multimeter to test the output speed sensor. Check the resistance and compare it to the manufacturer's specifications

  5. 5. If the sensor is a Hall effect or magnetic type, check for proper voltage and signal output while the vehicle is in motion

  6. 6. Check Wiring and Connectors

    Inspect the wiring harness for any signs of wear, fraying, or damage

  7. 7. Ensure that all connectors are clean, tight, and free of corrosion. Look for any bent pins or poor connections

  8. 8. Inspect the Transmission Control Module (TCM)

    Check for any issues with the TCM, as it processes the signals from the output speed sensor

  9. 9. Ensure that the TCM is receiving power and ground as required

  10. 10. Check for Ground Issues

    Verify that the ground connections for the output speed sensor and TCM are secure and free of corrosion

  11. 11. Test the Vehicle Speed Sensor (VSS)

    If applicable, check the vehicle speed sensor, as it may also affect the output speed sensor's performance

  12. 12. Look for Mechanical Issues

    Inspect the transmission for any mechanical issues that could affect the output speed sensor's operation, such as low fluid levels or internal damage

  13. 13. Clear Codes and Test Drive

    After performing repairs or adjustments, clear the trouble codes and take the vehicle for a test drive to see if the code returns

  14. 14. Seek Professional Help

    If the issue persists after performing these steps, consider seeking assistance from a qualified mechanic or technician who has experience with transmission diagnostics. By following these troubleshooting steps, you can systematically identify and resolve the underlying issue causing the P0723 code