WOMS
P code powertrain Medium severity

P1706 High Vehicle Speed Observed in Park

The OBD2 code P1706 indicates that the vehicle's speed sensor has detected a high vehicle speed while the transmission is in the "Park" position, which is not normal and suggests a potential issue with the transmission...

Definition

The OBD2 code P1706 indicates that the vehicle's speed sensor has detected a high vehicle speed while the transmission is in the "Park" position, which is not normal and suggests a potential issue with the transmission or speed sensor

Common causes

  • Faulty vehicle speed sensor
  • Malfunctioning transmission control module (TCM)
  • Wiring issues or damaged connectors
  • Incorrectly calibrated transmission
  • Faulty transmission range sensor
  • Software issues in the vehicle's control modules
  • Mechanical transmission problems

Common misdiagnoses

  • Transmission fluid issues
  • Faulty speed sensors
  • Malfunctioning transmission control module (TCM)
  • Wiring or connector problems
  • Incorrectly calibrated or faulty throttle position sensor
  • Engine control module (ECM) issues
  • Problems with the gear shift mechanism
  • Faulty brake light switch

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 the Vehicle Speed Sensor (VSS)

  3. 3. Locate the VSS, which is usually mounted on the transmission

  4. 4. Check the wiring and connectors for any signs of damage, corrosion, or loose connections

  5. 5. Test the VSS using a multimeter to ensure it is functioning correctly. The resistance should be within the manufacturer's specifications

  6. 6. Examine the Transmission Control Module (TCM)

  7. 7. Ensure that the TCM is receiving the correct signals from the VSS

  8. 8. Check for any software updates or reprogramming that may be required for the TCM

  9. 9. Inspect Transmission Fluid

  10. 10. Check the transmission fluid level and condition. Low or dirty fluid can cause erratic transmission behavior

  11. 11. If the fluid is low, top it off with the correct type of fluid. If it is dirty, consider a transmission fluid change

  12. 12. Check for Mechanical Issues

  13. 13. Inspect the transmission for any mechanical problems, such as slipping or internal damage

  14. 14. Look for any signs of wear or failure in the transmission components

  15. 15. Test the Transmission Range Sensor

  16. 16. The transmission range sensor (or neutral safety switch) tells the TCM what gear the transmission is in. If it is malfunctioning, it may send incorrect signals

  17. 17. Test the sensor for proper operation and alignment

  18. 18. Inspect Wiring and Connectors

  19. 19. Check all related wiring and connectors for damage, corrosion, or loose connections. Pay special attention to the wiring harnesses connected to the VSS and TCM

  20. 20. Perform a Visual Inspection

  21. 21. Look for any obvious signs of damage or wear in the transmission and surrounding components

  22. 22. Clear the Code and Test Drive

  23. 23. After performing any repairs or adjustments, clear the code using the OBD-II scanner and take the vehicle for a test drive to see if the code reappears

  24. 24. Consult a Professional

  25. 25. 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 and can perform more advanced diagnostics. By following these steps, you should be able to identify and resolve the underlying issue causing the P1706 code