Selective Catalytic Reduction Retrofit Aftertreatment Caterpillar

Exhaust Temperature Is Low

Usage:

SCR EF5

Use this procedure to troubleshoot a low exhaust temperature. Also, use this procedure if one of the following event codes is active or logged.

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Table 1
J1939 Code and Description	CDL Code and Description	Comments
2434-1 Engine Exhaust Manifold Bank #1 Temperature #1 : Low - most severe (3)	E324 (3) Low Right Exhaust Temperature	Hydrocarbon Loading of the aftertreatment catalyst has reached 160 percent.
2434-18 Engine Exhaust Manifold Bank #1 Temperature #1 : Low - moderate severity (2)	E324 (2) Low Right Exhaust Temperature	Hydrocarbon Loading of the aftertreatment catalyst has reached 140 percent.

Probable Causes

Codes

Recommended Actions

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Table 2
Troubleshooting Test Steps	Values	Results
1. Check for Codes A. Connect Cat^® Electronic Technician (ET) to the service tool connector. B. Look for active codes that are associated with the system for the event code.	Codes	Result: A 2434-1 or 2434- 18 code is active. Proceed to Test Step 2. Result: A 2434-1 or 2434- 18 code is not active. Return to Service.
2. Perform the Hydrocarbon (HC) Release Procedure A. Refer to the HC release procedure within the Operation and Maintenance Manual (OMM) for the proper steps to perform the HC release procedure.	OMM Procedure	Result: The 2434-1 or 2434- 18 codes cleared during the HC Release Procedure. Return to Service. Result: A 2434-1 or 2434- 18 code is active. Repair: Ensure that the HC Release Procedure was performed according to the specifications in the OMM. Verify that the repair eliminated the problem.

If the procedure did not correct the issue, contact your Cat dealer Technical Communicator (TC). For further assistance, your TC can confer with the Dealer Solutions Network (DSN).