P0983: Shift Solenoid D Control Circuit High

Definition

The OBD2 code P0983 indicates that there is a high voltage signal detected in the control circuit for Shift Solenoid D, which may suggest a malfunction in the solenoid or its circuit

Common causes

Faulty shift solenoid D
Wiring issues (short circuit or open circuit)
Poor electrical connections
Faulty transmission control module (TCM)
Low transmission fluid level
Contaminated transmission fluid
Internal transmission failure

Common misdiagnoses

Transmission fluid issues
Faulty transmission control module (TCM)
Wiring or connector problems
Shift solenoid failure
Transmission valve body issues
Engine control module (ECM) problems
Incorrectly diagnosed transmission failure
Electrical shorts or open circuits in the harness

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 multiple issues
2. Inspect Wiring and Connectors
3. Visually inspect the wiring and connectors associated with the Shift Solenoid D. Look for signs of damage, corrosion, or loose connections
4. Pay special attention to the wiring harness for any fraying or breaks
5. Test the Shift Solenoid
6. If accessible, test the solenoid itself for proper operation. You can do this by measuring the resistance across the solenoid terminals with a multimeter. Compare the readings to the specifications in the vehicle’s service manual
7. If the solenoid is faulty, it may need to be replaced
8. Check the Transmission Fluid
9. Ensure that the transmission fluid is at the correct level and in good condition. Low or dirty fluid can affect solenoid operation
10. If the fluid is contaminated, consider performing a transmission fluid change
11. Inspect the Transmission Control Module (TCM)
12. Check for any issues with the TCM, as it controls the operation of the shift solenoids. Look for signs of damage or corrosion
13. If necessary, test the TCM for proper operation
14. Test the Circuit
15. Use a multimeter to check the voltage and ground at the solenoid connector. Ensure that the solenoid is receiving the correct voltage as specified in the service manual
16. If the voltage is too high or too low, trace the circuit back to find the source of the issue
17. Check for Short Circuits
18. Inspect the circuit for any short circuits to ground or power. This can cause the solenoid to receive incorrect voltage levels
19. Clear Codes and Test Drive
20. After performing the necessary repairs, clear the trouble codes using the OBD-II scanner and take the vehicle for a test drive to see if the code returns
21. Consult a Professional
22. If the issue persists after performing these steps, it may be best to consult a professional mechanic or technician who has experience with transmission issues. By following these troubleshooting steps, you can systematically identify and resolve the issue related to the P0983 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 Shift Solenoid D. Look for signs of damage, corrosion, or loose connections

4. Pay special attention to the wiring harness for any fraying or breaks

5. Test the Shift Solenoid

6. If accessible, test the solenoid itself for proper operation. You can do this by measuring the resistance across the solenoid terminals with a multimeter. Compare the readings to the specifications in the vehicle’s service manual

7. If the solenoid is faulty, it may need to be replaced

8. Check the Transmission Fluid

9. Ensure that the transmission fluid is at the correct level and in good condition. Low or dirty fluid can affect solenoid operation

10. If the fluid is contaminated, consider performing a transmission fluid change

11. Inspect the Transmission Control Module (TCM)

12. Check for any issues with the TCM, as it controls the operation of the shift solenoids. Look for signs of damage or corrosion

13. If necessary, test the TCM for proper operation

14. Test the Circuit

15. Use a multimeter to check the voltage and ground at the solenoid connector. Ensure that the solenoid is receiving the correct voltage as specified in the service manual

16. If the voltage is too high or too low, trace the circuit back to find the source of the issue

17. Check for Short Circuits

18. Inspect the circuit for any short circuits to ground or power. This can cause the solenoid to receive incorrect voltage levels

19. Clear Codes and Test Drive

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

21. Consult a Professional

22. If the issue persists after performing these steps, it may be best to consult a professional mechanic or technician who has experience with transmission issues. By following these troubleshooting steps, you can systematically identify and resolve the issue related to the P0983 code