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C code chassis Medium severity

C1737 Air Suspension RR Corner Up Timeout

The OBD2 code C1737 indicates a timeout issue with the air suspension system at the right rear corner, meaning the system failed to raise or adjust that corner within the expected time frame

Definition

The OBD2 code C1737 indicates a timeout issue with the air suspension system at the right rear corner, meaning the system failed to raise or adjust that corner within the expected time frame

Common causes

  • Faulty air suspension compressor
  • Leaking air springs or lines
  • Blocked or damaged air lines
  • Malfunctioning height sensors
  • Electrical issues (wiring or connectors)
  • Failed air suspension control module
  • Low air pressure in the system
  • Obstructed or damaged suspension components

Common misdiagnoses

  • Faulty air suspension compressor
  • Leaking air bags or air lines
  • Defective height sensors
  • Electrical issues or wiring problems
  • Malfunctioning control module
  • Incorrectly calibrated suspension system
  • Tire pressure issues
  • Suspension linkage problems

Troubleshooting steps

  1. 1. Visual Inspection

  2. 2. Check for any visible damage to the air suspension components, including the air spring, air lines, and fittings

  3. 3. Inspect the wiring and connectors for any signs of corrosion, damage, or loose connections

  4. 4. Check for Leaks

  5. 5. Inspect the air spring for leaks. You can do this by listening for hissing sounds or using soapy water to check for bubbles

  6. 6. Examine the air lines and fittings for any signs of air leaks

  7. 7. Test the Air Compressor

  8. 8. Ensure that the air compressor is functioning properly. Listen for the compressor running when the suspension is supposed to adjust

  9. 9. Check the compressor relay and fuse to ensure they are working correctly

  10. 10. Scan for Additional Codes

  11. 11. Use an OBD-II scanner to check for any additional trouble codes that may provide more context to the issue

  12. 12. Address any other codes that may be present, as they could be related to the air suspension problem

  13. 13. Check the Height Sensors

  14. 14. Inspect the height sensors for proper operation. These sensors monitor the vehicle's height and send signals to the control module

  15. 15. Ensure that the sensors are not damaged or misaligned

  16. 16. Examine the Control Module

  17. 17. Check the air suspension control module for any faults. This may require specialized diagnostic equipment

  18. 18. Ensure that the module is receiving proper power and ground

  19. 19. Test the System Operation

  20. 20. Manually activate the air suspension system (if possible) to see if the right rear corner responds

  21. 21. Monitor the system for any unusual noises or behaviors during operation

  22. 22. Check for Software Updates

  23. 23. In some cases, manufacturers release software updates for the control module. Check if there are any updates available for your vehicle

  24. 24. Consult Repair Manual

  25. 25. Refer to the vehicle's service manual for specific troubleshooting procedures and specifications related to the air suspension system

  26. 26. Professional Diagnosis

  27. 27. 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 steps, you should be able to identify the cause of the C1737 code and take appropriate action to resolve the issue