WOMS
P code powertrain High severity

P0713 Transmission Fluid Temperature Sensor A Circuit High Input

The OBD2 code P0713 indicates that the transmission fluid temperature sensor A is sending a high voltage signal, which suggests a potential issue with the sensor or its circuit

Definition

The OBD2 code P0713 indicates that the transmission fluid temperature sensor A is sending a high voltage signal, which suggests a potential issue with the sensor or its circuit

Common causes

  • Faulty transmission fluid temperature sensor
  • Short circuit in the wiring or connectors
  • Open circuit in the wiring or connectors
  • Corroded or damaged connectors
  • Faulty engine control module (ECM)
  • Poor ground connection
  • High resistance in the wiring harness

Common misdiagnoses

  • Faulty transmission fluid temperature sensor
  • Wiring issues or short circuits in the sensor circuit
  • Transmission control module (TCM) malfunction
  • Engine control module (ECM) issues
  • Low transmission fluid level or quality
  • Faulty transmission solenoids
  • Incorrectly diagnosed transmission problems
  • Electrical connector problems or corrosion

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 other issues present

  2. 2. Inspect the Wiring and Connectors

    Visual Inspection: Check the wiring harness and connectors associated with the TFT sensor for any signs of damage, corrosion, or loose connections

  3. 3. Connector Condition

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

  4. 4. Test the Transmission Fluid Temperature Sensor

    Resistance Check: Use a multimeter to measure the resistance of the TFT sensor. Compare the readings to the specifications provided in the vehicle’s service manual. A faulty sensor may show resistance values outside the normal range

  5. 5. Voltage Check

    With the ignition on (engine off), check the voltage at the sensor connector. It should match the specifications in the service manual

  6. 6. Check the Transmission Fluid

    Fluid Level: Ensure that the transmission fluid is at the correct level. Low fluid levels can cause incorrect sensor readings

  7. 7. Fluid Condition

    Inspect the fluid for contamination or burning. Old or degraded fluid can affect sensor performance

  8. 8. Inspect the PCM (Powertrain Control Module)

    Software Updates: Check if there are any available software updates for the PCM that may address known issues with the TFT sensor

  9. 9. Ground Connections

    Ensure that the PCM has a good ground connection, as poor grounding can lead to erroneous sensor readings

  10. 10. Perform a Circuit Test

    Wiring Continuity: Check for continuity in the wiring between the TFT sensor and the PCM. Look for any breaks or shorts in the wiring

  11. 11. Short to Voltage

    Check for a short circuit to voltage in the wiring that could cause a high input signal

  12. 12. Replace the Sensor

    If the sensor is determined to be faulty after testing, replace it with a new one. Ensure that the replacement part is compatible with your vehicle

  13. 13. Clear Codes and Test Drive

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

  14. 14. Consult a Professional

    If the issue persists after following these steps, it may be best to consult a professional mechanic or technician who has experience with transmission systems and OBD-II diagnostics. By following these troubleshooting steps, you should be able to identify the cause of the P0713 code and take appropriate action to resolve the issue