Volvo FM Handbook page 306

lamp and MIL symbol. Fill the tank immediately with
AdBlue. When the empty tank message is shown, a
certain amount of AdBlue is still circulating in the
system. The injection stops of AdBlue.
The fact that the urea tank becomes empty during
driving does not cause damage to the urea system or
the engine, as the remaining solution in the system
circulates and cools it. However, engine exhaust
emissions increase when the dosing valve is closed
and the exhaust gases are not further processed. If this
is not rectified by filling with AdBlue engine power
reduction will occur and a "non-erasable fault code"
will be set for 400 days.
If the SCRsystem cannot circulate AdBlue the
following message is shown together with the yellow
information lamp (CHECK) and MIL symbol.
The next time the truck is stationary with the engine
running, i.e. at traffic lights, the power will be reduced
by 40% of max power. The following message is
shown on the display together with the yellow warning
lamp (CHECK) and MIL symbol. The truck's engine
output returns to normal as soon as the AdBlue tank is
filled.
Display message - with malfunction of
emission control monitoring system
If a fault occurs in the NOx monitoring system, the
following message is shown on the display together
with the yellow information lamp (CHECK) and MIL
symbol.
If the system senses that the fault remains, the power
will be reduced by 40% of max power. The following
message is shown on the display together with the
yellow information lamp (CHECK) and MILsymbol.
The truck's engine power returns to normal when the
system senses that the fault is rectified.
Exhaust cleaning 295
Engine derate
High emissions!
Engine derate
at next stop
High emissions!
Engine derate
High emissions!