CONE 5D7453 - Caterpillar

The Engine Control Module (ECM) monitors the temperature at the intake of the Diesel Particulate Filter (DPF) and at the outlet of the DPF. The ECM activates the applicable code when the conditions are met.
Table 1
Diagnostic Trouble Codes for the Intake of the DPF    
J1939 Code    Description    Information that Relates to the Code    
3242-16     Diesel Particulate Filter Intake Gas Temperature (bank 1) : High - Moderate Severity (2)     The temperature at the intake of the DPF exceeded 750 °C (1380 °F).
Active regeneration is immediately disabled. Engine power is derated. The code is logged.    
3276-16     Diesel Particulate Filter Intake Gas Temperature (bank 2) : High - Moderate Severity (2)    
Follow the troubleshooting procedure in order to identify the root cause of the problem.    
Table 2
Diagnostic Trouble Codes for the Outlet of the DPF    
J1939 Code    Description    Information that Relates to the Code    
3246-15     Diesel Particulate Filter Outlet Gas Temperature (bank 1) : High - Least Severe (1)     The temperature at the outlet of the DPF exceeded
750 °C (1380 °F).
Active regeneration is immediately disabled. Engine power is derated. The code is logged.
These codes are usually caused by excessive fuel or oil in the DPF.    
3280-15     Diesel Particulate Filter Outlet Gas Temperature (bank 2) : High - Least Severe (1)    
3246-16     Diesel Particulate Filter Outlet Gas Temperature (bank 1) : High - Moderate Severity (2)     The temperature at the outlet of the DPF exceeded
800 °C (1470 °F).
Active regeneration is immediately disabled. The Clean Gas Induction System (CGI) is turned off. Engine power is derated. The code is logged.
These codes are usually caused by excessive fuel or oil in the DPF.    
3280-16     Diesel Particulate Filter Outlet Gas Temperature (bank 2) : High - Moderate Severity (2)    
Follow the troubleshooting procedure in order to identify the root cause of the problem.    Troubleshooting Procedure
If you are troubleshooting a 3246-16 code or a 3280-16 code, the outlet of the DPF must be inspected. Perform the following procedure in order to inspect the DPF. For all other codes, proceed to the next test step.
Remove the outlet section from the DPF. Inspect the outlet face of the DPF. Contact your local technical communicator for Caterpillar on-highway truck engines for assistance in determining if the DPF must be replaced.If the DPF is OK, continue with this troubleshooting procedure in order to determine the cause of the very high outlet temperature.If the DPF must be replaced, continue with this troubleshooting procedure in order to determine the cause of the very high outlet temperature. Then, replace the DPF. Provide the serial numbers of both of the diesel particulate filters to your local technical communicator for Caterpillar on-highway truck engines.
If the vehicle is equipped with an ARD disable switch, verify that the switch is not disabling the ARD. Refer to the vehicle's service manual in order to determine the proper operation of the switch.
Troubleshoot any diagnostic