WOMS
P code powertrain Medium severity

P0568 Cruise Control Switch High Input

The OBD2 code P0568 indicates that the cruise control switch is sending a high input signal, which may suggest a malfunction or short circuit in the cruise control system

Definition

The OBD2 code P0568 indicates that the cruise control switch is sending a high input signal, which may suggest a malfunction or short circuit in the cruise control system

Common causes

  • Faulty cruise control switch
  • Short circuit in the cruise control circuit
  • Open circuit in the cruise control circuit
  • Corroded or damaged wiring/connectors
  • Malfunctioning engine control module (ECM)
  • Faulty brake switch
  • Issues with the vehicle's power supply or grounding

Common misdiagnoses

  • Faulty cruise control switch
  • Wiring issues or shorts in the cruise control circuit
  • Malfunctioning brake light switch
  • Faulty engine control module (ECM)
  • Issues with the throttle position sensor
  • Problems with the vehicle speed sensor
  • Faulty body control module (BCM)

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 visible damage or wear

  4. 4. Ensure that the switch is functioning properly. You can test the switch with a multimeter to see if it is sending the correct signals when pressed

  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. Look for frayed wires or broken connectors that could cause a high input signal

  8. 8. Check for Ground Issues

    Ensure that the cruise control system has a good ground connection. A poor ground can lead to erratic behavior and false signals

  9. 9. Test the Cruise Control Module

    If the switch and wiring appear to be in good condition, the issue may lie within the cruise control module itself. Testing or replacing the module may be necessary

  10. 10. Inspect the Brake Light Switch

    The cruise control system often relies on the brake light switch to disengage. If the brake light switch is malfunctioning, it could send a false signal to the cruise control system

  11. 11. Look for Software Updates

    In some cases, a software update for the vehicle's engine control unit (ECU) may resolve the issue. Check with the manufacturer or a dealership for any available updates

  12. 12. Clear the Code and Test Drive

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

  13. 13. Consult a Professional

    If the issue persists after performing these steps, it may be best to consult a professional mechanic or technician who has experience with cruise control systems and can perform more in-depth diagnostics. By following these steps, you should be able to identify and resolve the issue related to the P0568 code