CHASSIS OPT 3C8309 - Caterpillar

Table 1
Diagnostic Trouble Codes for the Intake of the DPF
J1939 Code Description Information that Relates to the Code
3242-18 Diesel Particulate Filter Intake Gas Temperature (bank 1) : Low - Moderate Severity (2) The Aftertreatment Regeneration Device (ARD) has been running for at least 30 seconds. The temperature at the intake of the DPF is below 50 °C (122 °F).
Active regeneration is immediately disabled. Engine power is derated. The code is logged. The code remains active until electrical power to the ECM is cycled. The following conditions can cause this code:
The exhaust piping between the outlet of the ARD and the intake of the DPF is disconnected.
There is moisture in an electrical connector for the sensor group for the DPF.
3276-18 Diesel Particulate Filter Intake Gas Temperature (bank 2) : Low - Moderate Severity (2)
Table 2
Diagnostic Trouble Codes for the Outlet of the DPF
J1939 Code Description Information that Relates to the Code
3246-18 Diesel Particulate Filter Outlet Gas Temperature (bank 1) : Low - Moderate Severity (2) An active regeneration is in progress. The temperature at the flame detection temperature sensor is at least 350 °C (660 °F). The temperature at the outlet of the DPF has been below 50 °C (122 °F) for five minutes.
Engine power is derated. The code is logged. The code remains active until electrical power to the ECM is cycled. The following conditions can cause this code:
The outlet temperature sensor for the DPF is not installed into the DPF.
There is moisture in an electrical connector for the sensor group for the DPF.
3280-18 Diesel Particulate Filter Outlet Gas Temperature (bank 2) : Low - Moderate Severity (2) Troubleshooting Procedure for Low DPF Intake Temperature
Carefully Inspect the exhaust piping between the outlet of the ARD and the intake of the DPF. Look for the following problems:
Missing piping, cracked piping, or disconnected piping
Broken clamps or missing clamps
Illustration 1 g01429997
Use the color of the inside of the harness connector in order to identify the appropriate connectors.
Inspect the electrical connectors for the sensor group for the DPF. Be sure to inspect the harness connector and the connector on the sensor group. Look for moisture in the connectors. Dry the connectors if moisture is found. If the vehicle is equipped with two diesel particulate filters, refer to Illustration 1 in order to identify the appropriate connectors.Troubleshooting Procedure for Low Outlet Temperature
Illustration 2 g01430019
Typical DPF
(1) Outlet temperature sensor for the DPF
(2) Outlet for CGI
(3) Outlet of the DPF
Refer to Illustration 2. Verify that outlet temperature sensor (1) is installed into the DPF.
Inspect the electrical connectors for the sensor group for the DPF. Be sure to inspect the harness connector and the connector on the sensor group. Look for moisture in the connectors. Dry the connectors if moisture is found. If the vehicle is equipped with two diesel particulate filters, refer to Illustration 1 in order to identify the appropriate connectors.