per FREIGHTLINER:
Fuel/DEF Gauge
The fuel and DEF levels are measured in a multipurpose fuel/DEF/voltmeter gauge. See Fig. 7.9 .
A. 1 to 4 lamps steady green in DEF lightbar, DEF level indicators.
B. 1 lamp steady amber in DEF lightbar, DEF low, refill DEF.
C. 1 lamp flashing red in DEF lightbar, DEF empty, refill DEF.
Fig. 7.9, Fuel/DEF/Voltmeter Gauge
Fuel level is indicated at the top of the gauge. Below the fuel level, a low fuel warning lamp illuminates amber when the fuel level drops below 1/8th of the capacity.
The DEF lightbar indicates the level in the DEF tank as follows.
Four bars illuminated green—Between 75% and 100% full
Three bars illuminated green—Between 50% and 75% full
Two bars illuminated green—Between 25% and 50% full
One bar illuminated green—Between approximately 10% and 25% full
One bar illuminated amber—DEF low, refill DEF
One bar flashing red—DEF empty, refill DEF
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