C7.1 Engines Caterpillar

Diesel Particulate Filter Temperature Is Low

Usage:

C7.1 6J6

The Electronic Control Module (ECM) monitors the temperature at the intake of the Diesel Particulate Filter (DPF). The ECM activates the following code when the conditions are met.

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Table 1
Diagnostic Trouble Codes for Diesel Particulate Filter Temperature Is Low
J1939 Codes	CDL Codes	Code Description (code descriptions may vary)	Comments
3242-17	E1014 (1)	Aftertreatment #1 DPF Intake Gas Temperature : Low - least severe (1)	The temperature at the intake of the DPF is below the trip point that is calculated by the ECM. The trip point varies depending on engine operating conditions.
3242-18	E1014 (2)	Aftertreatment #1 DPF Intake Gas Temperature : Low - moderate severity (2)	The temperature sensor is not correctly installed. Engine power is derated 30%. The code is logged. The code remains active until electrical power to the ECM is cycled.

Complete the procedure in the order in which the steps are listed.

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Table 2
Troubleshooting Test Steps	Values	Results
1. Check for Recently Logged Diagnostic Trouble Codes A. Turn the keyswitch to the ON position. B. Connect the electronic service tool. C. Check for recently logged codes.	Diagnostic trouble codes	Result: A 3242-17 code is recently logged. Proceed to Test Step 2. Result: A 3242-18 code is recently logged. Proceed to Test Step 4. Result: A code other than 3242-17 or 3242-18 is active. Repair: Diagnose and rectify the fault before continuing with this procedure. Refer to Troubleshooting, "Diagnostic Trouble Codes".
2. Visually Inspect the Insulation on the Exhaust Duct (if equipped) A. Check the insulation on the exhaust duct between the engine and the Clean Emissions Module (CEM). Make sure that insulation is not missing or damaged.	Insulation	Result: The insulation is missing or damaged. Repair: Replace the insulation. Proceed to Test Step 5. Result: The insulation is not missing or damaged. Proceed to Test Step 3.
3. Check for Exhaust Back Pressure Regulator Faults A. Use the electronic service tool to perform the "Air System Motor Valve Verification Test".	Pass	Result: The "Air System Motor Valve Verification Test" failed. Repair: Troubleshoot active diagnostic codes generated as a result of the test. Result: The "Air System Motor Valve Verification Test" passed. Proceed to Test Step 5.
4. Check the Sensor Installation A. Check that the temperature sensor is correctly installed and is not loose.	Sensor installation	Result: The temperature sensor is not correctly installed or is loose. Repair: Install the temperature sensor and tighten to the recommended torque. Refer to Disassembly and Assembly, "Temperature Sensor (DPF) - Remove and Install". Proceed to Test Step 5. Result: The temperature sensor is correctly installed and is not loose. Proceed to Test Step 5.
5. Check for Engine Faults A. Start the engine. B. Use the electronic service tool to check that the fault has been eliminated.	Diagnostic	Result: The fault has been eliminated. Return the unit to service. Result: The fault is still present. Contact the Dealer Solutions Network (DSN).