WOMS
C code chassis Medium severity

C1819 Air Suspension RR Air Compress Request Exceeded Max Timing

The OBD2 code C1819 indicates that the rear air suspension system's compressor has been requested to operate beyond its maximum allowable time, suggesting a potential issue with the air suspension system or its...

Definition

The OBD2 code C1819 indicates that the rear air suspension system's compressor has been requested to operate beyond its maximum allowable time, suggesting a potential issue with the air suspension system or its components

Common causes

  • Faulty air suspension compressor
  • Leaks in the air suspension system
  • Blocked air lines or filters
  • Malfunctioning height sensors
  • Electrical issues or wiring problems
  • Faulty relay or fuse
  • Software or calibration issues in the air suspension control module

Common misdiagnoses

  • Faulty air suspension compressor
  • Air suspension relay issues
  • Leaking air springs or bags
  • Faulty height sensors
  • Wiring or connector issues
  • Air suspension control module failure
  • Low air pressure in the system
  • Blocked air lines or filters

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 affecting the air suspension system

  2. 2. Inspect the Air Suspension System

    Visual Inspection: Check for any visible damage to the air suspension components, including air bags, lines, and fittings. Look for leaks or signs of wear

  3. 3. Connections

    Ensure all electrical connections to the air compressor and suspension components are secure and free of corrosion

  4. 4. Test the Air Compressor

    Operation: Listen for the air compressor operation when the vehicle is started. It should activate and run for a short period

  5. 5. Voltage and Ground

    Use a multimeter to check that the compressor is receiving the correct voltage and has a good ground connection

  6. 6. Check for Air Leaks

    Inspect the air lines and air bags for leaks. You can use soapy water to check for bubbles indicating a leak when the system is pressurized

  7. 7. Examine the Height Sensors

    Check the height sensors for proper operation. If they are malfunctioning, they may send incorrect signals to the control module, causing the compressor to run excessively

  8. 8. Inspect the Relay and Fuses

    Check the relay and fuses associated with the air suspension system. A faulty relay can prevent the compressor from operating correctly

  9. 9. Scan for Module Communication Issues

    Ensure that the air suspension control module is communicating properly with other modules in the vehicle. Communication issues can lead to improper operation

  10. 10. Reset the System

    After performing repairs or inspections, clear the trouble codes using the OBD-II scanner and see if the code returns after a test drive

  11. 11. Check for Software Updates

    Sometimes, manufacturers release software updates for the vehicle's control modules. Check if there are any updates available that may address known issues

  12. 12. Professional Diagnosis

    If the issue persists after performing the above steps, consider seeking help from a professional mechanic or a dealership with experience in air suspension systems. By following these troubleshooting steps, you should be able to identify and resolve the issue related to the C1819 code