DEF TANK EMPTY LEVEL
What This Code Means
Engine emissions system malfunction (EESM) symbol is displayed; Generator derating occurs (soot level 4 or 5); Generator shutdown (soot level 5); Diesel exhaust fluid (DEF) symbol is displayed (ON or Blinking); Pre-alarm lamp is ON; Shutdown lamp is ON; Unit derating occurs; Engine shutdown; DEF Symbol ON; DEF Symbol blinking; Pre-Alarm Lamp ON; Engine Shutdown; Unit cannot be restarted normally; Shutdown Lamp ON; DEF Symbol is ON; DEF Symbol is Blinking; Pre-Alarm Lamp is ON; Shutdown Lamp is ON; Generator derating; Generator shutdown; DEF Icon ON; DEF Icon Blinking; Controller message: DEF<10% Tank Level; Controller message: DEF=0% Level Shutdown; DEF Symbol is blinking; Controller message: DEF Tank Empty Level; Unit fails to restart normally
Possible Causes
- •Engine emissions are outside of normal operation range
- •System fault has occurred
- •Soot level is at level 4 or 5
- •DEF tank level is below 10%
- •DEF tank level is at 0%
- •DEF tank is empty (or 4 hours have elapsed since reaching 0%)
- •DEF quality is poor
- •DEF Level below 10%
- •DEF Level at 0%
- •DEF Tank Empty
- •4 hours elapsed from 0% DEF level
- •DEF Level is below 10%
- •DEF Level is at 0%
- •DEF Level is empty or 4 hours have elapsed from 0%
- •Soot level 4
- •Soot level 5
- •DEF level below 10%
- •DEF level at 0%
- •DEF tank empty
- •4 hours elapsed from DEF level 0%
Suggested Actions
- 1Contact nearest authorized MQ service center
- 2Refill DEF tank
- 3Check DEF tank level
- 4Check active diagnostic trouble codes (DTC)
- 5Activate ESCAPE MODE to restart the unit (unit will run for 30 minutes)
- 6Contact your nearest authorized service center
- 7Refill the DEF tank when replenishing diesel fuel
- 8Refill the DEF tank
- 9Replenish diesel fuel
Related Multiquip Fault Codes
ASK RUDY ABOUT THIS FAULT
Get a diagnosis walkthrough for DEF TANK EMPTY LEVEL on your specific Multiquip unit — cited to the OEM manual, not a forum guess.
TRY IT FREE