SPN 3050 - FMI 11 (Fault Code 2637)
SPN3050 FMI11
Catalyst Face Plugged - Root Cause Not Known
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| ISB, ISC, and ISL - Aftertreatment System |
Fault Code: 2637
PID(P), SID(S):
SPN: 3050
FMI: 11/11
Lamp: None
REASON: Catalyst Face Plugged - Root Cause Not Known. The front face of the aftertreatment diesel
oxidation catalyst has been detected to be plugged with soot.
EFFECT: Active aftertreatment diesel particulate filter regeneration will be disabled.
Circuit Description:
This fault code is set when the inlet face of the diesel oxidation catalyst (DOC) is detected to be plugged with soot.
The aftertreatment system is monitored by three temperature sensors that are located in the exhaust system. The temperature sensors around the aftertreatment DOC are used to monitor the temperature differential across the catalyst during active regeneration of the aftertreatment system.
Component Location:
The aftertreatment DOC is located in the exhaust system. The location of the catalyst may vary, depending on the original equipment manufacturer (OEM).
Conditions for Running the Diagnostics:
This diagnostic runs continuously when the engine is operating and an active regeneration of the aftertreatment is occurring.
Conditions for Setting the Fault Codes:
The engine control module (ECM) detects that the conditions for face plugging of the DOC are present and that plugging may have occurred.
Action Taken When the Fault Code is Active:
• The fault code is logged immediately when the diagnostic runs and fails
• Active aftertreatment diesel particulate filter regeneration will be disabled
• The exhaust gas recirculation (EGR) valve operation will be disabled.
Conditions for Clearing the Fault Code:
The fault code will be set to inactive after performing INSITE™ electronic service tool Diesel Oxidation Catalyst Maintenance Reset procedure found under the Aftertreatment Maintenance section of Advanced ECM Data, or when the conditions for DOC face plugging are no longer occurring.
Shop Talk:
Verify the ECM calibration is correct. Check the calibration revision history found on QuickServe™ Online for applicable fixes to the calibration stored in the ECM.
This fault code is set when the inlet face of the DOC is detected to be plugged with soot. The engine is taking corrective action to clean the DOC. No troubleshooting is required if this is the only fault. This is an information fault only.
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