81

UnclassifiedEmissions

What This Code Means

DEF icon displayed; DEF State Pre-Alarm; DEF Severe Inducement PA (Pre-Alarm) active; DEF Severe Inducement A (Alarm) active; 70% de-rated power; Unit will not carry full load; Under Frequency warning or alarm; Unit derate; Engine shutdown; Generator derating; Generator shutdown

Possible Causes

  • DEF tank level is below 10%
  • Poor DEF quality
  • DEF tank is at a low level
  • After-treatment related DTC active
  • Generator load is higher than 30% during power de-rate
  • DEF tank level is at 0% (empty)
  • Soot level 4 reached
  • Soot level 5 reached

Suggested Actions

  1. 1Check DEF tank level
  2. 2Check active diagnostic trouble codes (DTC)
  3. 3Refill DEF tank
  4. 4Check active DTCs under menu: Metering -> J1939 -> Active DTC
  5. 5Refill the DEF tank

ASK RUDY ABOUT THIS FAULT

Get a diagnosis walkthrough for 81 on your specific Multiquip unit — cited to the OEM manual, not a forum guess.

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