DEF LOW 5% SD

UnclassifiedEmissions

What This Code Means

Check DEF indicator displayed on the Exhaust After-Treatment Dashboard screen; DEF level below 15%; DEF level below 10%; Check DEF indicator is illuminated (not flashing); Engine shutdown with restart available; DEF level below 5%; Check DEF indicator is flashing; Engine shutdown with restart unavailable; Controller message DEF Low 15% WA is displayed; Controller message DEF Low 10% SD is displayed; Check DEF indicator is illuminated and not flashing; Engine shutdown occurs with restart available; Controller message DEF Low 5% SD is displayed; Engine shutdown occurs with restart unavailable; DEF Low 15% WA controller message displayed; Engine shut down; Engine can be restarted; DEF Indicator not flashing; DEF Low 10% SD controller message displayed; Engine cannot be restarted; DEF Indicator slow flashing; DEF Low 5% SD controller message displayed; Engine shutdown (restart available); DEF Indicator active (not flashing); Engine shutdown (restart unavailable)

Possible Causes

  • The level of diesel exhaust fluid in the DEF tank is below 10% capacity
  • DEF quality is poor
  • Diesel exhaust fluid level is below 15% capacity
  • Diesel exhaust fluid level is below 10% capacity
  • Diesel exhaust fluid level is below 5% capacity
  • DEF level is below 10%
  • DEF level is below 15%
  • DEF level is below 5%
  • DEF level below 5%
  • DEF level below 15%
  • DEF level below 10%
  • DEF level decreased to below 10%
  • DEF level decreased to below 15%
  • DEF level decreased to below 5%

Suggested Actions

  1. 1Check the DEF tank level
  2. 2Check active diagnostic trouble codes
  3. 3Refer to Table 13, DEF Level System Action
  4. 4Replenish DEF

ASK RUDY ABOUT THIS FAULT

Get a diagnosis walkthrough for DEF LOW 5% SD on your specific Multiquip unit — cited to the OEM manual, not a forum guess.

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