WOMS
C code chassis Medium severity

C0628 Level Control Position Sensor Circuit High

The OBD2 code C0628 indicates a problem with the level control position sensor circuit, specifically that the circuit is reading a high voltage or signal, which may suggest a malfunction in the sensor or its wiring

Definition

The OBD2 code C0628 indicates a problem with the level control position sensor circuit, specifically that the circuit is reading a high voltage or signal, which may suggest a malfunction in the sensor or its wiring

Common causes

  • Faulty level control position sensor
  • Damaged wiring or connectors
  • Short circuit in the sensor circuit
  • Open circuit in the sensor circuit
  • Corroded connectors
  • Faulty control module
  • Incorrect sensor calibration or installation

Common misdiagnoses

  • Faulty level control module
  • Defective air suspension compressor
  • Wiring issues or shorts in the harness
  • Bad ground connections
  • Incorrectly calibrated level sensors
  • Air leaks in the suspension system
  • Faulty height sensors
  • Issues with the vehicle's body control module (BCM)

Troubleshooting steps

  1. 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 multiple issues

  2. 2. Inspect the Wiring and Connectors

    Visually inspect the wiring and connectors associated with the level control position sensor. Look for

  3. 3. Damaged, frayed, or corroded wires

  4. 4. Loose or disconnected connectors

  5. 5. Signs of moisture or dirt that could affect the connections

  6. 6. Test the Level Control Position Sensor

    Use a multimeter to test the resistance and voltage output of the level control position sensor. Compare the readings to the manufacturer’s specifications

  7. 7. If the sensor is out of spec, it may need to be replaced

  8. 8. Check the Ground Connection

    Ensure that the ground connection for the level control position sensor is secure and free of corrosion. A poor ground can lead to incorrect readings

  9. 9. Inspect the Air Suspension System (if applicable)

    If the vehicle has an air suspension system, check for leaks or issues with the air bags, compressor, and other components. A malfunctioning air suspension system can affect the level control sensor

  10. 10. Examine the Control Module

    Check the vehicle’s control module for any signs of damage or malfunction. If the control module is faulty, it may need to be reprogrammed or replaced

  11. 11. Clear the Codes and Test Drive

    After performing the above checks and repairs, clear the trouble codes using the OBD-II scanner. Take the vehicle for a test drive to see if the code returns

  12. 12. Consult Technical Service Bulletins (TSBs)

    Look for any TSBs related to the C0628 code for your specific vehicle make and model. Manufacturers may have issued guidance on common issues and fixes

  13. 13. Seek Professional Help

    If the issue persists after performing the above steps, it may be necessary to consult a professional mechanic or technician who has experience with your vehicle’s specific system.Conclusion Troubleshooting OBD-II code C0628 involves a systematic approach to inspect and test the level control position sensor and its associated components. By following these steps, you can identify the root cause of the issue and take appropriate action to resolve it