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3-36
Fault code
J1939 SPN
J1939 FMI
Reason
Effect (only when fault code is active)
1885
3216
4
Aftertreatment intake NOx sensor circuit -
Voltage below normal or shorted to low source.
An internal circuit error has been detected by
the aftertreatment intake NOx sensor.
Possible reduced engine performance.
1887
3226
4
Aftertreatment outlet NOx sensor circuit -
Voltage below normal or shorted to low source.
An internal circuit error has been detected by
the aftertreatment outlet NOx sensor.
Possible reduced engine performance.
1896
2791
13
EGR valve controller - Out of calibration.
The EGR valve has failed the automatic
calibration procedure at initial key ON.
Possible reduced engine performance.
1921
3251
0
Aftertreatment diesel particulate filter differential
pressure - Data valid but above normal
operating range - Moderately severe level. The
soot load of the aftertreatment diesel particulate
filter has exceeded the recommended limits.
Possible reduced engine performance.
1922
3251
0
Aftertreatment diesel particulate filter differential
pressure - Data valid but above normal
operating range - Most severe level.
The soot load of the aftertreatment diesel
p a r t i c u l a t e f i l t e r h a s e x c e e d e d t h e
recommended limits. Engine protection derate
is enabled.
Possible reduced engine performance.
1938
3597
1
Ecu power output supply voltage 1 - Data valid
bu t b e l ow n o r m a l o p e ra t i o n a l ra n g e -
Moderately severe level. Low battery voltage
detected by the VGT actuator.
Possible reduced engine performance.
1942
101
2
Crankcase pressure - Data erratic, intermittent,
or incorrect. The ECM has detected that the
crankcase pressure signal is reading an erratic
value at initial key ON or during engine
operation.
None on performance.
1961
2791
0
EGR valve control circuit calculated over
temperature - Data valid but above normal
operational range - Least severe level.
High EGR valve driver temperature has been
detected.
Possible reduced engine performance.
1962
641
0
VGT Actuator dr iver over temperature
(calculated) - Data valid but above normal
operating range - Least severe level.
High internal VGT actuator temperature has
been detected.
None on performance.
1974
101
16
Crankcase pressure - Data valid but above
normal operating range - Moderately severe
level. The crankcase breather filter requires
maintenance.
None on performance.
※
Some fault codes are not applied to this machine.
Summary of Contents for HL955
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