Low DEF Level Warning Indications and Vehicle Consequences
for Emergency Vehicles
DEF Tank Level
Indicator
Lamps
Consequence
Remedy
Above initial
warning threshold
(Over 25% full).
None.
None.
None.
Below initial warning
threshold (25% full).
DEF solid
None.
Add 1 gallon
(3.8L) DEF to
5-gallon (19.0L)
tank or 2 gallons
(7.6L) DEF to
9-gallon (34.0L)
tank..
Critical warning
threshold (20% full).
DEF
blinking
None.
First vehicle
consequence (15%
full).
DEF
blinking
/
Amber engine
solid
None.
Final vehicle
consequence
(Empty) and engine
intentionally shut
down (key off) or in
extended idle for
one hour.
DEF
blinking
/
Amber engine
solid
/
Red engine
solid
None.
Add 1 gallon
(3.8L) DEF to
5-gallon (19.0L)
tank or 2 gallons
(7.6L) DEF to
9-gallon (34.0L)
tank. Allow the
system to prime.
112
Fuel and Refueling
2015 F-650/750
(f67)
Owners Guide gf
(ownloose)
, 1st Printing, December 2013
Canadian_French
(fr_can)