Daewoo Bus BS Series, Owner'S Manual

Page: 245 / 260

7-55
FAULTY DIAGNOSIS
Fault
Code
LAMP REASON EFFECT
1896
1899
1921
1922
1923
1924
1926
1927
1928
1932
1933
1934
1935
1938
Amber
Amber
Amber
Red
Amber
Amber
Amber
Amber
Amber
Amber
Amber
Amber
Amber
Amber
The EGR valve has failed the automatic calibration procedure
at initial key-on
The EGR differential pressure sensor has detected low EGR
gas flow or the EGR differential pressure reading is not valid
for engine operating conditions
The soot load of the aftertreatment diesel particulate filter has
exceeded the recommended limits
The soot load of the aftertreatment diesel particulate filter has
exceeded the recommended limits
High signal voltage detected at the aftertreatment differential
fuel shutoff valve circuit
Low signal voltage detected at the aftertreatment differential
fuel shutoff valve circuit
The ECM has detected that the aftertreatment fuel pressure
signal is not changing with engine operating conditions
High signal voltage detected at the aftertreatment fuel
pressure sensor circuit
Low signal voltage detected at the aftertreatment fuel
pressure sensor circuit
An error has been detected in rither the aftertreatment fuel
injector or the aftertreatment fuel shutoff valve system
High battery voltage detected by the EGR valve
Low battery voltage detected by the EGR valve
Intermittent communication between the smart EGR valve
controller and the ECM has been detected
Low battery voltage detected by the VGT actuator
EGR valve actuation will be disabled.
EGR valve actuation will be disabled.
The aftertreatment dash lamp will flash.
Engine protection derate.
Severe engine derate.
Active aftertreatment diesel particulate filter
regeneration will be disabled.
Active aftertreatment diesel particulate filter
regeneration will be disabled.
None on performance.
None on performance.
None on performance.
Active aftertreatment diesel particulate filter
regeneration will be disabled.
EGR valve actuation will be disabled.
Low voltage information fault code only.
The EGR valve will hold the position of the last
valid J1939 message.
None on performance.