C1722: Air Suspension Height Sensor Power Circuit Short To Battery

Definition

The OBD2 code C1722 indicates that there is a short circuit in the power circuit of the air suspension height sensor, causing it to receive voltage directly from the battery instead of the intended power source

Common causes

Shorted wiring or connectors
Faulty height sensor
Corroded or damaged connectors
Grounding issues
Malfunctioning air suspension control module
Battery voltage issues
Improper installation or modifications

Common misdiagnoses

Faulty air suspension height sensor
Wiring issues or shorts in the harness
Bad ground connections
Malfunctioning air suspension control module
Incorrectly calibrated height sensor
Battery or charging system problems
Faulty connectors or terminals

Troubleshooting steps

1. Scan Tool Verification
2. Use an OBD-II scanner to confirm the presence of the C1722 code. Check for any additional codes that may provide more context about the issue
3. Visual Inspection
4. Inspect the wiring and connectors associated with the air suspension height sensor. Look for signs of damage, corrosion, fraying, or loose connections
5. Check the harness for any signs of wear or exposure to heat sources that could cause insulation breakdown
6. Check the Sensor
7. Locate the air suspension height sensor and inspect it for physical damage
8. Ensure that the sensor is securely mounted and that there are no obstructions affecting its operation
9. Test the Voltage Supply
10. Using a multimeter, check the voltage at the height sensor connector. The voltage should match the specifications provided in the vehicle’s service manual
11. If the voltage is higher than expected, it may indicate a short circuit to the battery
12. Check Ground Connections
13. Ensure that the ground connection for the height sensor is secure and free of corrosion. A poor ground can cause erratic sensor readings
14. Inspect the Air Suspension Control Module
15. If applicable, check the air suspension control module for any signs of damage or corrosion. Ensure that it is functioning properly
16. Perform a Continuity Test
17. With the vehicle off, perform a continuity test on the wiring between the height sensor and the control module. Look for any shorts to ground or battery
18. Check for Shorts
19. Inspect the wiring harness for any shorts to battery voltage. This can be done by checking resistance between the sensor wires and the battery positive terminal
20. Clear the Code
21. After performing repairs or adjustments, clear the code using the OBD-II scanner and take the vehicle for a test drive to see if the code returns
22. If the issue persists, consult the vehicle’s service manual for specific diagnostic procedures related to the air suspension system. 1
23. Professional Help
24. If you are unable to resolve the issue, consider seeking help from a professional mechanic or an automotive technician who specializes in air suspension systems. By following these steps, you should be able to diagnose and potentially resolve the issue related to the C1722 code

Definition

Common causes

Common misdiagnoses

Troubleshooting steps

1. Scan Tool Verification

2. Use an OBD-II scanner to confirm the presence of the C1722 code. Check for any additional codes that may provide more context about the issue

3. Visual Inspection

4. Inspect the wiring and connectors associated with the air suspension height sensor. Look for signs of damage, corrosion, fraying, or loose connections

5. Check the harness for any signs of wear or exposure to heat sources that could cause insulation breakdown

6. Check the Sensor

7. Locate the air suspension height sensor and inspect it for physical damage

8. Ensure that the sensor is securely mounted and that there are no obstructions affecting its operation

9. Test the Voltage Supply

10. Using a multimeter, check the voltage at the height sensor connector. The voltage should match the specifications provided in the vehicle’s service manual

11. If the voltage is higher than expected, it may indicate a short circuit to the battery

12. Check Ground Connections

13. Ensure that the ground connection for the height sensor is secure and free of corrosion. A poor ground can cause erratic sensor readings

14. Inspect the Air Suspension Control Module

15. If applicable, check the air suspension control module for any signs of damage or corrosion. Ensure that it is functioning properly

16. Perform a Continuity Test

17. With the vehicle off, perform a continuity test on the wiring between the height sensor and the control module. Look for any shorts to ground or battery

18. Check for Shorts

19. Inspect the wiring harness for any shorts to battery voltage. This can be done by checking resistance between the sensor wires and the battery positive terminal

20. Clear the Code

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

22. If the issue persists, consult the vehicle’s service manual for specific diagnostic procedures related to the air suspension system. 1

23. Professional Help

24. If you are unable to resolve the issue, consider seeking help from a professional mechanic or an automotive technician who specializes in air suspension systems. By following these steps, you should be able to diagnose and potentially resolve the issue related to the C1722 code