P0575: Cruise Control Input Circuit Malfunction

Definition

The OBD2 code P0575 indicates a malfunction in the cruise control input circuit, which may affect the operation of the cruise control system

Common causes

Faulty cruise control switch
Damaged wiring or connectors in the cruise control circuit
Malfunctioning brake pedal switch
Faulty throttle position sensor
Issues with the engine control module (ECM)
Blown fuse related to the cruise control system
Grounding issues in the cruise control circuit

Common misdiagnoses

Faulty cruise control switch
Malfunctioning brake light switch
Wiring issues or shorts in the circuit
Faulty throttle position sensor
Defective engine control module (ECM)
Issues with the accelerator pedal position sensor
Problems with the cruise control actuator

Troubleshooting steps

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. Inspect the Cruise Control Switch
3. Check the cruise control switch for any visible damage or wear
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. Examine Wiring and Connectors
6. Inspect the wiring and connectors associated with the cruise control system for any signs of damage, corrosion, or loose connections
7. Pay special attention to the wiring harness that connects the cruise control switch to the vehicle's computer
8. Test the Brake Pedal Position Switch
9. The cruise control system often relies on the brake pedal position switch to disengage when the brake is pressed. Test this switch to ensure it is functioning correctly
10. Check for proper alignment and operation of the switch
11. Check the Cruise Control Module
12. If the switch and wiring are in good condition, the issue may lie with the cruise control module itself. Inspect the module for any signs of damage or malfunction
13. If possible, test the module to ensure it is working correctly
14. Inspect Fuses and Relays
15. Check the fuses and relays associated with the cruise control system. A blown fuse or faulty relay can cause the system to malfunction
16. Look for Ground Issues
17. Ensure that all ground connections related to the cruise control system are secure and free of corrosion
18. Perform a System Reset
19. After addressing any issues found, clear the trouble codes using the OBD-II scanner and take the vehicle for a test drive to see if the code reappears
20. Consult the Vehicle’s Service Manual
21. Refer to the specific service manual for your vehicle for any additional troubleshooting steps or specifications related to the cruise control system
22. Seek Professional Help
23. If you are unable to identify or resolve the issue after performing these steps, it may be best to consult a professional mechanic or technician who has experience with cruise control systems. By following these steps, you should be able to diagnose and potentially resolve the P0575 code

Definition

Common causes

Common misdiagnoses

Troubleshooting steps

1. Check for Additional Codes

2. Inspect the Cruise Control Switch

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

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. Examine Wiring and Connectors

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

7. Pay special attention to the wiring harness that connects the cruise control switch to the vehicle's computer

8. Test the Brake Pedal Position Switch

9. The cruise control system often relies on the brake pedal position switch to disengage when the brake is pressed. Test this switch to ensure it is functioning correctly

10. Check for proper alignment and operation of the switch

11. Check the Cruise Control Module

12. If the switch and wiring are in good condition, the issue may lie with the cruise control module itself. Inspect the module for any signs of damage or malfunction

13. If possible, test the module to ensure it is working correctly

14. Inspect Fuses and Relays

15. Check the fuses and relays associated with the cruise control system. A blown fuse or faulty relay can cause the system to malfunction

16. Look for Ground Issues

17. Ensure that all ground connections related to the cruise control system are secure and free of corrosion

18. Perform a System Reset

19. After addressing any issues found, clear the trouble codes using the OBD-II scanner and take the vehicle for a test drive to see if the code reappears

20. Consult the Vehicle’s Service Manual

21. Refer to the specific service manual for your vehicle for any additional troubleshooting steps or specifications related to the cruise control system

22. Seek Professional Help

23. If you are unable to identify or resolve the issue after performing these steps, it may be best to consult a professional mechanic or technician who has experience with cruise control systems. By following these steps, you should be able to diagnose and potentially resolve the P0575 code