WOMS
C code chassis High severity

C1846 Air Suspension Front Inflator Solenoid Output Circuit Open

The OBD2 code C1846 indicates that there is an open circuit in the air suspension front inflator solenoid output, meaning the solenoid is not receiving the necessary electrical signal to operate properly

Definition

The OBD2 code C1846 indicates that there is an open circuit in the air suspension front inflator solenoid output, meaning the solenoid is not receiving the necessary electrical signal to operate properly

Common causes

  • Faulty air suspension inflator solenoid
  • Open or damaged wiring in the circuit
  • Poor electrical connections or corroded terminals
  • Failed air suspension control module
  • Blown fuse related to the air suspension system
  • Grounding issues in the circuit

Common misdiagnoses

  • Faulty air suspension compressor
  • Bad air suspension relay
  • Damaged wiring or connectors
  • Defective air suspension control module
  • Incorrectly calibrated height sensors
  • Air leaks in the suspension system
  • Faulty suspension struts or bags

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

    Visual Inspection: Look for any visible damage to the wiring harness, connectors, or the solenoid itself. Check for frayed wires, corrosion, or loose connections

  3. 3. Connector Condition

    Ensure that the connectors are clean and securely attached. Corrosion or dirt can cause poor connections

  4. 4. Test the Solenoid

    Resistance Check: Use a multimeter to measure the resistance of the inflator solenoid. Compare the reading to the manufacturer’s specifications. If it’s out of range, the solenoid may be faulty

  5. 5. Power Supply Check

    With the ignition on, check if the solenoid is receiving power when it should be activated. If not, there may be an issue upstream

  6. 6. Check the Air Suspension Control Module

    Inspect the air suspension control module for any signs of damage or malfunction. If the module is faulty, it may not send the correct signals to the solenoid

  7. 7. Inspect the Fuses

    Check the relevant fuses associated with the air suspension system. A blown fuse can interrupt the power supply to the solenoid

  8. 8. Test the Ground Circuit

    Ensure that the ground connection for the solenoid is intact. A poor ground can lead to an open circuit condition

  9. 9. Perform a System Reset

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

  10. 10. Consult Technical Service Bulletins (TSBs)

    Check for any TSBs related to the air suspension system for your specific vehicle make and model. There may be known issues or recalls that could apply

  11. 11. Seek Professional Help

    If the issue persists after performing these steps, it may be necessary to consult a professional mechanic or technician who has experience with air suspension systems.Conclusion By following these troubleshooting steps, you should be able to identify the cause of the C1846 code and take appropriate action to resolve the issue. Always refer to the vehicle’s service manual for specific procedures and specifications related to your vehicle