P0714: Transmission Fluid Temperature Sensor A Circuit Intermittent

Definition

The OBD2 code P0714 indicates that there is an intermittent issue with the Transmission Fluid Temperature Sensor A circuit, which may affect the transmission's performance and operation

Common causes

Faulty transmission fluid temperature sensor
Damaged wiring or connectors
Poor electrical connections
Short circuit in the sensor circuit
Open circuit in the sensor circuit
Faulty transmission control module (TCM)
Corrosion in connectors or terminals
Low transmission fluid level
Contaminated transmission fluid

Common misdiagnoses

Faulty transmission fluid temperature sensor
Wiring issues or short circuits in the sensor circuit
Transmission control module (TCM) malfunction
Low transmission fluid level or quality
Faulty transmission solenoids
Engine control module (ECM) issues
Incorrectly diagnosed transmission problems
Other sensor failures (e.g., engine coolant temperature sensor)

Troubleshooting steps

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. Inspect Wiring and Connectors
3. Visually inspect the wiring and connectors associated with the TFT sensor. Look for signs of damage, corrosion, fraying, or loose connections
4. Ensure that the connectors are securely attached and free of dirt or moisture
5. Test the TFT Sensor
6. Use a multimeter to test the resistance of the TFT sensor. Compare the readings to the specifications provided in the vehicle’s service manual
7. If the sensor is out of specification, it may need to be replaced
8. Check the Circuit
9. Test the voltage and ground at the sensor connector with the ignition on (engine off). Ensure that the sensor is receiving the correct voltage
10. Check for continuity in the wiring between the sensor and the engine control module (ECM). Look for any breaks or shorts in the wiring
11. Inspect the Transmission Fluid
12. Check the transmission fluid level and condition. Low or contaminated fluid can affect sensor readings and transmission performance
13. If the fluid is dirty or burnt, consider changing it and replacing the filter
14. Look for Intermittent Issues
15. Since the code indicates an intermittent issue, pay attention to any patterns in when the code appears (e.g., during specific driving conditions or after certain temperatures)
16. Consider using a scan tool with live data capabilities to monitor the TFT sensor readings while driving to see if they fluctuate unexpectedly
17. Check the ECM
18. If all other components check out, there may be an issue with the ECM itself. Ensure that the ECM is functioning properly and that it is receiving and processing signals correctly
19. Clear the Codes and Test Drive
20. After performing repairs or replacements, clear the trouble codes and take the vehicle for a test drive to see if the code reappears
21. Consult a Professional
22. If you are unable to resolve the issue after 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 steps, you should be able to identify and address the cause of the P0714 code

Definition

Common causes

Common misdiagnoses

Troubleshooting steps

1. Check for Additional Codes

2. Inspect Wiring and Connectors

3. Visually inspect the wiring and connectors associated with the TFT sensor. Look for signs of damage, corrosion, fraying, or loose connections

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

5. Test the TFT Sensor

6. Use a multimeter to test the resistance of the TFT sensor. Compare the readings to the specifications provided in the vehicle’s service manual

7. If the sensor is out of specification, it may need to be replaced

8. Check the Circuit

9. Test the voltage and ground at the sensor connector with the ignition on (engine off). Ensure that the sensor is receiving the correct voltage

10. Check for continuity in the wiring between the sensor and the engine control module (ECM). Look for any breaks or shorts in the wiring

11. Inspect the Transmission Fluid

12. Check the transmission fluid level and condition. Low or contaminated fluid can affect sensor readings and transmission performance

13. If the fluid is dirty or burnt, consider changing it and replacing the filter

14. Look for Intermittent Issues

15. Since the code indicates an intermittent issue, pay attention to any patterns in when the code appears (e.g., during specific driving conditions or after certain temperatures)

16. Consider using a scan tool with live data capabilities to monitor the TFT sensor readings while driving to see if they fluctuate unexpectedly

17. Check the ECM

18. If all other components check out, there may be an issue with the ECM itself. Ensure that the ECM is functioning properly and that it is receiving and processing signals correctly

19. Clear the Codes and Test Drive

20. After performing repairs or replacements, clear the trouble codes and take the vehicle for a test drive to see if the code reappears

21. Consult a Professional

22. If you are unable to resolve the issue after 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 steps, you should be able to identify and address the cause of the P0714 code