WOMS
P code powertrain Medium severity

P1739 Slip Solenoid System

The OBD2 code P1739 indicates a malfunction in the slip solenoid system, which is responsible for controlling the engagement and disengagement of the transmission's clutch to manage slip during shifting

Definition

The OBD2 code P1739 indicates a malfunction in the slip solenoid system, which is responsible for controlling the engagement and disengagement of the transmission's clutch to manage slip during shifting

Common causes

  • Faulty slip solenoid
  • Wiring issues or damaged connectors
  • Low transmission fluid level
  • Contaminated transmission fluid
  • Faulty transmission control module (TCM)
  • Malfunctioning valve body
  • Internal transmission problems

Common misdiagnoses

  • Transmission fluid issues
  • Faulty transmission control module (TCM)
  • Wiring or connector problems
  • Faulty speed sensors
  • Internal transmission failure
  • Engine control module (ECM) issues
  • Incorrectly diagnosed solenoid problems
  • Mechanical transmission issues

Troubleshooting steps

  1. 1. Check for Additional Codes

    Use an OBD-II scanner to check for any other trouble codes that may be present. Addressing any related codes can help in diagnosing the issue more effectively

  2. 2. Inspect Wiring and Connectors

    Visually inspect the wiring and connectors related to the slip solenoid. Look for signs of damage, corrosion, or loose connections. Repair or replace any damaged components

  3. 3. Test the Slip Solenoid

    Use a multimeter to test the resistance of the slip solenoid. Compare the readings to the specifications provided in the vehicle's service manual. If the solenoid is out of specification, it may need to be replaced

  4. 4. Check Transmission Fluid

    Ensure that the transmission fluid is at the correct level and is in good condition. Low or dirty fluid can cause transmission issues. If the fluid is dirty, consider performing a transmission fluid change

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

    Check the TCM for any signs of damage or malfunction. If necessary, reprogram or replace the TCM according to the manufacturer's specifications

  6. 6. Check for Mechanical Issues

    Inspect the transmission for any mechanical problems that could affect the operation of the slip solenoid. This may include checking for worn clutches, bands, or other internal components

  7. 7. Perform a Road Test

    After addressing any issues found, perform a road test to see if the code returns. Monitor the transmission's performance during the test

  8. 8. Clear the Codes

    After repairs are made, clear the trouble codes using the OBD-II scanner and see if the P1739 code reappears after driving the vehicle

  9. 9. Consult a Professional

    If the issue persists after performing these steps, it may be necessary to consult a professional mechanic or transmission specialist for further diagnosis and repair. Always refer to the specific service manual for your vehicle for detailed procedures and specifications, as the troubleshooting steps may vary depending on the make and model