C0473: Steering Handwheel Speed Sensor Signal V High

Definition

The OBD2 code C0473 indicates that the steering handwheel speed sensor is sending a high voltage signal, which may suggest a malfunction or fault in the sensor or its circuit

Common causes

Faulty steering handwheel speed sensor
Damaged wiring or connectors
Poor electrical connections
Malfunctioning power steering system
Software issues in the vehicle's control module
Calibration issues with the steering system

Common misdiagnoses

Faulty steering angle sensor
Malfunctioning power steering pump
Defective steering rack
Wiring issues or shorts in the harness
Faulty electronic control unit (ECU)
Incorrectly calibrated steering system
Issues with the vehicle's stability control system

Troubleshooting steps

1. Check for Additional Codes

Use an OBD-II scanner to check for any other related trouble codes. This can provide more context and help identify if there are other issues present
2. Inspect Wiring and Connectors
3. Visually inspect the wiring and connectors associated with the steering handwheel speed sensor. Look for signs of damage, corrosion, or loose connections
4. Ensure that the connectors are securely attached and that there are no bent pins
5. Test the Sensor
6. If possible, test the steering handwheel speed sensor using a multimeter. Check the resistance and voltage output according to the manufacturer's specifications
7. Compare the readings to the expected values in the service manual
8. Check for Ground Issues
9. Ensure that the sensor has a good ground connection. A poor ground can lead to incorrect voltage readings
10. Use a multimeter to check the ground continuity
11. Inspect the Steering Column
12. Check for any mechanical issues in the steering column that could affect the sensor's operation, such as binding or excessive play
13. Look for Software Updates
14. Check if there are any software updates or recalls for the vehicle that may address issues related to the steering system
15. Clear Codes and Test Drive
16. After performing any repairs or adjustments, clear the trouble codes and take the vehicle for a test drive to see if the code returns
17. Replace the Sensor
18. If the sensor is found to be faulty after testing, it may need to be replaced. Ensure that you use a quality replacement part
19. Refer to the vehicle's service manual for specific diagnostic procedures and specifications related to the steering handwheel speed sensor
20. Seek Professional Help
21. If the issue persists after performing these steps, it may be best to consult a professional mechanic or technician who has experience with the specific vehicle make and model. By following these steps, you should be able to diagnose and potentially resolve the issue related to the C0473 code

Definition

Common causes

Common misdiagnoses

Troubleshooting steps

1. Check for Additional Codes

2. Inspect Wiring and Connectors

3. Visually inspect the wiring and connectors associated with the steering handwheel speed sensor. Look for signs of damage, corrosion, or loose connections

4. Ensure that the connectors are securely attached and that there are no bent pins

5. Test the Sensor

6. If possible, test the steering handwheel speed sensor using a multimeter. Check the resistance and voltage output according to the manufacturer's specifications

7. Compare the readings to the expected values in the service manual

8. Check for Ground Issues

9. Ensure that the sensor has a good ground connection. A poor ground can lead to incorrect voltage readings

10. Use a multimeter to check the ground continuity

11. Inspect the Steering Column

12. Check for any mechanical issues in the steering column that could affect the sensor's operation, such as binding or excessive play

13. Look for Software Updates

14. Check if there are any software updates or recalls for the vehicle that may address issues related to the steering system

15. Clear Codes and Test Drive

16. After performing any repairs or adjustments, clear the trouble codes and take the vehicle for a test drive to see if the code returns

17. Replace the Sensor

18. If the sensor is found to be faulty after testing, it may need to be replaced. Ensure that you use a quality replacement part

19. Refer to the vehicle's service manual for specific diagnostic procedures and specifications related to the steering handwheel speed sensor

20. Seek Professional Help

21. If the issue persists after performing these steps, it may be best to consult a professional mechanic or technician who has experience with the specific vehicle make and model. By following these steps, you should be able to diagnose and potentially resolve the issue related to the C0473 code