WOMS
P code powertrain Medium severity

P1565 Speed Control Command Switch Out of Range High

The OBD2 code P1565 indicates that the speed control command switch is sending a signal that is higher than the expected range, which may affect the operation of the cruise control system

Definition

The OBD2 code P1565 indicates that the speed control command switch is sending a signal that is higher than the expected range, which may affect the operation of the cruise control system

Common causes

  • Faulty speed control command switch
  • Wiring issues or damaged connectors
  • Malfunctioning cruise control module
  • Faulty throttle position sensor
  • Software or calibration issues in the engine control module (ECM)
  • Electrical shorts or open circuits in the speed control system
  • Corroded or loose ground connections

Common misdiagnoses

  • Throttle Position Sensor (TPS) issues
  • Accelerator Pedal Position Sensor (APPS) problems
  • Cruise Control Module failure
  • Wiring or connector issues
  • Engine Control Module (ECM) faults
  • Faulty brake light switch
  • Malfunctioning cruise control actuator

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 Cruise Control Switch

  3. 3. Check the cruise control switch for any physical damage or wear

  4. 4. Ensure that the switch is functioning properly and that there are no stuck buttons

  5. 5. Examine Wiring and Connectors

  6. 6. Inspect the wiring harness and connectors associated with the cruise control system for any signs of damage, corrosion, or loose connections

  7. 7. Repair or replace any damaged wiring or connectors

  8. 8. Test the Cruise Control Module

  9. 9. If applicable, test the cruise control module for proper operation. This may require specialized diagnostic equipment

  10. 10. Ensure that the module is receiving the correct input signals from the switch

  11. 11. Check for Ground Issues

  12. 12. Ensure that the cruise control system has a good ground connection. Poor grounding can lead to erratic behavior and false codes

  13. 13. Inspect the Throttle Position Sensor (TPS)

  14. 14. The TPS can affect the cruise control operation. Check for proper operation and calibration of the TPS

  15. 15. Look for any signs of wear or damage, and test the sensor's output

  16. 16. Verify Vehicle Speed Sensor (VSS) Operation

  17. 17. The vehicle speed sensor provides input to the cruise control system. Check the VSS for proper operation and ensure it is sending accurate speed data to the engine control module (ECM)

  18. 18. Check for Software Updates

  19. 19. In some cases, a software update for the vehicle's ECM may be necessary to resolve compatibility issues or bugs related to the cruise control system

  20. 20. Clear Codes and Test Drive

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

  22. 22. Refer to the vehicle's service manual for specific diagnostic procedures and specifications related to the cruise control system. If the issue persists after following these steps, it may be necessary to consult a professional mechanic or technician for further diagnosis and repair