P0762: Shift Solenoid C Stuck On

Definition

The OBD2 code P0762 indicates that the Shift Solenoid C is stuck in the "on" position, which can affect the transmission's ability to shift gears properly

Common causes

Faulty shift solenoid C
Wiring issues or short circuits
Poor electrical connections
Transmission fluid issues (low or contaminated fluid)
Faulty transmission control module (TCM)
Internal transmission problems
Faulty PCM (Powertrain Control Module)
Mechanical binding in the transmission

Common misdiagnoses

Faulty transmission control module (TCM)
Wiring issues or short circuits
Low transmission fluid level or contamination
Faulty shift solenoid A or B
Transmission valve body problems
Internal transmission damage
Incorrectly diagnosed engine issues
Faulty speed sensors

Troubleshooting steps

1. Check Transmission Fluid
2. Ensure that the transmission fluid is at the correct level and in good condition. Low or dirty fluid can cause shifting issues
3. If the fluid is dirty, consider changing it and replacing the filter
4. Inspect Wiring and Connectors
5. Check the wiring and connectors leading to the Shift Solenoid C for any signs of damage, corrosion, or loose connections
6. Repair or replace any damaged wiring or connectors
7. Test the Shift Solenoid
8. Use a multimeter to test the resistance of the Shift Solenoid C. Compare the readings to the specifications in the vehicle's service manual
9. If the solenoid is out of specification, it may need to be replaced
10. Check for Other Codes
11. Scan the vehicle for any additional trouble codes that may provide more context or indicate related issues
12. Address any other codes before focusing on P0762
13. Inspect the Transmission Control Module (TCM)
14. The TCM controls the operation of the shift solenoids. If there is a fault in the TCM, it may cause the solenoid to remain stuck on
15. Check for any software updates or known issues with the TCM for your specific vehicle model
16. Perform a Transmission Fluid Flush
17. If the fluid is contaminated or has not been changed in a long time, consider performing a transmission fluid flush to remove any debris or contaminants
18. Check for Mechanical Issues
19. Inspect the transmission for any mechanical issues that could affect the operation of the solenoid, such as sticking valves or internal wear
20. Clear Codes and Test Drive
21. After performing any repairs or maintenance, clear the trouble codes and take the vehicle for a test drive to see if the code returns
22. Consult a Professional
23. If the issue persists after performing the above steps, it may be necessary to consult a professional mechanic or transmission specialist for further diagnosis. By following these steps, you can systematically identify and address the cause of the P0762 code

Definition

Common causes

Common misdiagnoses

Troubleshooting steps

1. Check Transmission Fluid

2. Ensure that the transmission fluid is at the correct level and in good condition. Low or dirty fluid can cause shifting issues

3. If the fluid is dirty, consider changing it and replacing the filter

4. Inspect Wiring and Connectors

5. Check the wiring and connectors leading to the Shift Solenoid C for any signs of damage, corrosion, or loose connections

6. Repair or replace any damaged wiring or connectors

7. Test the Shift Solenoid

8. Use a multimeter to test the resistance of the Shift Solenoid C. Compare the readings to the specifications in the vehicle's service manual

9. If the solenoid is out of specification, it may need to be replaced

10. Check for Other Codes

11. Scan the vehicle for any additional trouble codes that may provide more context or indicate related issues

12. Address any other codes before focusing on P0762

13. Inspect the Transmission Control Module (TCM)

14. The TCM controls the operation of the shift solenoids. If there is a fault in the TCM, it may cause the solenoid to remain stuck on

15. Check for any software updates or known issues with the TCM for your specific vehicle model

16. Perform a Transmission Fluid Flush

17. If the fluid is contaminated or has not been changed in a long time, consider performing a transmission fluid flush to remove any debris or contaminants

18. Check for Mechanical Issues

19. Inspect the transmission for any mechanical issues that could affect the operation of the solenoid, such as sticking valves or internal wear

20. Clear Codes and Test Drive

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

22. Consult a Professional

23. If the issue persists after performing the above steps, it may be necessary to consult a professional mechanic or transmission specialist for further diagnosis. By following these steps, you can systematically identify and address the cause of the P0762 code