WOMS
P code powertrain Medium severity

P0985 Shift Solenoid E Control Circuit Low

The OBD2 code P0985 indicates a problem with the Shift Solenoid E control circuit, specifically that the circuit is reading a low voltage or signal when it should not be

Definition

The OBD2 code P0985 indicates a problem with the Shift Solenoid E control circuit, specifically that the circuit is reading a low voltage or signal when it should not be

Common causes

  • Faulty shift solenoid E
  • Wiring issues (shorts or open circuits)
  • Poor electrical connections
  • Faulty transmission control module (TCM)
  • Low transmission fluid level
  • Contaminated transmission fluid
  • Internal transmission failure

Common misdiagnoses

  • Faulty transmission control module (TCM)
  • Wiring issues or shorts in the harness
  • Faulty shift solenoid E
  • Low transmission fluid level
  • Transmission fluid contamination
  • Faulty transmission valve body
  • Incorrectly diagnosed transmission failure
  • Issues with other shift solenoids
  • Faulty connectors or terminals
  • Engine control module (ECM) problems

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 more context and help identify related issues

  2. 2. Inspect Wiring and Connectors

  3. 3. Visually inspect the wiring and connectors associated with the Shift Solenoid E. Look for signs of damage, corrosion, or loose connections

  4. 4. Ensure that the connectors are securely attached and that there are no broken wires

  5. 5. Test the Shift Solenoid E

  6. 6. If accessible, test the solenoid itself for proper operation. This may involve measuring resistance with a multimeter. Refer to the vehicle's service manual for the specific resistance values

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

  8. 8. Check the Transmission Fluid

  9. 9. Inspect the transmission fluid level and condition. Low or dirty fluid can affect solenoid operation. If the fluid is low, top it off with the correct type of fluid. If it is dirty, consider a transmission fluid change

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

  11. 11. Check for any issues with the TCM, as it controls the operation of the shift solenoids. Look for signs of damage or corrosion on the module and its connectors

  12. 12. If necessary, test the TCM for proper operation

  13. 13. Test Voltage and Ground

  14. 14. Use a multimeter to check the voltage at the solenoid connector while the vehicle is running. Ensure that the voltage is within the specified range

  15. 15. Also, check for a good ground connection at the solenoid

  16. 16. Check for Short Circuits

  17. 17. Inspect the wiring harness for any signs of short circuits or grounding issues that could cause a low voltage condition

  18. 18. Clear Codes and Test Drive

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

  20. 20. Consult a Professional

  21. 21. If the issue persists after performing these steps, it may be necessary to consult a professional mechanic or technician who has experience with transmission issues. By following these troubleshooting steps, you can identify and potentially resolve the issue associated with the P0985 code. Always refer to the specific service manual for your vehicle for detailed procedures and specifications