4-13
4.4.9
FAILURE OF EXHAUST GAS CLEANING DEVICE
When the following warnings are displayed on the monitor, the exhaust gas cleaning device has a failure or an
error.
When keep operating with the exhaust gas cleaning device having a failure or an error, the engine output is
restricted and, in the end, the machine becomes inoperable. When these warnings are displayed, contact our
service factory.
LEVEL
Warning Display
Description
Level 1
P
204F
Failure of NOx exhaust
control system
(Error code is example)
Displayed with the warning sound when
a device or sensor has a failure or an
error.
P
204F
Failure of DEF/AdBlue
dosing module
(Error code is example)
P1459
Failure of EGR valve
(Error code is example)
Level 2
P
204F
Failure of NOx exhaust
control system
(Error code is example)
Displayed with the warning sound when
a certain period of time has passed from
Level 1. The engine output is restricted.
P
204F
Failure of DEF/AdBlue
dosing module
(Error code is example)
P1459
Failure of EGR valve
(Error code is example)
Level 3
P
204F
Failure of NOx exhaust
control system
(Error code is example)
Displayed with the continuous warning
sound when a certain period of time has
passed from Level 2. The engine output
is further restricted than Level 2.
P
204F
Failure of DEF/AdBlue
dosing module
(Error code is example)
P1459
Failure of EGR valve
(Error code is example)
When failure of the DEF/AdBlue quality or the exhaust gas cleaning device occurs repeatedly, the warning level
goes up. If another failure of the DEF/AdBlue quality or the exhaust gas cleaning device occurs in a short period of
time after the failure of that is corrected, the warning level starts from Level 3.
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