(Table 240, contd)
Service Error Identifiers
Description Troubleshooting
$11C0
Aftertreatment Diesel Oxidation Catalyst Intake
Temperature Too Low
The DOC intake temperature is not reaching
the target required by the test. Look for
causes of excessive heat loss between the
engine and the aftertreatment
$11BA
Aftertreatment SCR System Not Ready to Dose
The SCR system needs to dose a small
amount of DEF during HC dosing. The DEF
dosing is to protect the DEF injector tip from
getting damaged at high temperature. The
SCR system is not working properly. Check
for associated SCR system diagnostic codes
and follow relevant troubleshooting
procedures.
$1168
Engine Exhaust Back Pressure Too High
The observed exhaust back pressure when
testing the EBPR is too high. Look for associ-
ated EBPR diagnostic codes. Run the “Air
System Motor Valves Verification Test” to
check the correct performance of the EBPR.
$1169
Engine Exhaust Back Pressure Too Low
The observed exhaust back pressure when
testing the EBPR is too low. Look for associ-
ated EBPR diagnostic codes. Check for ex-
haust system leaks. Run the “Air System
Motor Valves Verification Test” to check the
correct operation of the EBPR.
$1130
Aftertreatment Failed to Ignite
The DOC may be aged so not enough heat is
being generated for the amount of HC dosing
fuel being injected. The DOC may be sulfated.
Run the “Aftertreatment Recovery Procedure”
.
$11B9
Aftertreatment #1 SCR Catalyst Intake Gas
Temperature Too Low
The HC dosing procedure is generating the
correct heat rise. However, a significant
amount of this heat is being lost before the ex-
haust gas reaches the SCR. Check for signs
of exhaust leaks in the CEM between the
DOC and the SCR.
High Pressure Fuel Pump Calibration
(continued)
UENR4469-36 493
Service
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