Daewoo Bus BS Series Owner's Manual page 249

Fault
LAMP
Code
No communications on the J1939 datalink between the
2636 Red
engine ECM and the smart VGT controller
The front face of the aftertreatment diesel oxidation catalyst
2637 None
has been detected to be plugged with soot
The temperature increase across the a aftertreatment
2638 None
diesel oxidation catalyst is lower than expected
The soot load of the aftertreatment diesel particulate filter
2639 None
has exceeded the recommended limits
The EGR valve was closed to reduce engine coolant temperature
2646 Amber
The EGR valve was closed to reduce engine coolant temperature
2659 None
Excessive fuel injection into the aftertreatment system has
2728 None
been detected
High signal voltage detected at the aftertreatment fuel drain
2732 Amber
valve circuit
Low signal voltage detected at the aftertreatment fuel drain
2733 Amber
valve circuit
High signal voltage or open circuit detected at the ether
2738 Amber
start solenoid circuit
Low signal voltage detected at the ether start solenoid circuit
2739 Amber
Aftertreatment fuel shutoff valve 1 and aftertreatment fuel
2741 Amber
drain valve wiring harness connections are reversed
The temperature in the aftertreatment system can not
2742 None
reach the required temperature for stationary regeneration
REASON
7-59
EFFECT
VGT actuation will be disabled.
Active aftertreatment diesel particulate filter
regeneration will be disabled.
None on performance.
The aftertreatment dash lamp will be illuminated
and will begin to flash as the severity of the soot
load increases.
Possible engine protection derate based on severity.
EGR valve actuation will be disabled.
EGR valve actuation will be disabled.
None on performance.
Active aftertreatment diesel particulate filter
regeneration will be disabled.
Active aftertreatment diesel particulate filter
regeneration will be disabled.
Ether start functionality will be disabled.
Ether start functionality will be disabled.
Active aftertreatment diesel particulate filter
regeneration will be disabled.
None on performance.
FAULTY DIAGNOSIS