HOSE 2373940 - Caterpillar

Table 1
J1939 Code and Description CDL Code and Description Comments
3251-13
Aftertreatment #1 DPF Differential Pressure : Out of Calibration 2458-13
DPF #1 Differential Pressure Sensor : Out of Calibration During key on, the signal voltage from the diesel particulate filter #1 differential pressure sensor indicated a dpf differential pressure greater than +/- 2 kPa (0.3 psi).
The 2458-13 will not activate for several hours if the ambient temperature is below 7° C (45° F) or if an active regeneration has not been performed.
There is not a reference sensor for this sensor
3609-13
DPF #1 Intake Pressure : Out of Calibration 3464-13
DPF #1 Intake Pressure Sensor : Out of Calibration During key on, the signal voltage from the diesel particulate filter #1 intake pressure sensor indicated a dpf intake pressure greater than +/- 6 kPa (1 psi) from the atmospheric pressure sensor.
Reference sensor : Atmospheric Pressure Sensor
3837-13
Aftertreatment #1 Secondary Air Pressure : Out of Calibration 3493-13
Aftertreatment #1 Secondary Air Pressure Sensor : Calibration Required During key on, the signal voltage from the aftertreatment #1 secondary air pressure sensor indicated a secondary air pressure greater than +/- 12 kPa (2 psi) .from the atmospheric pressure sensor.
Reference sensor : Atmospheric Pressure Sensor Note: The engine coolant temperature must be greater than 0° C (32° F) before beginning this procedure.
Table 2
Troubleshooting Test Steps Values Results
1. Check for Codes
A. Establish communication between Cat® Electronic Technician (ET) and the ECM . Refer to Troubleshooting, "Electronic Service Tools", if necessary.
B. Download the "Warranty Report" from the engine ECM before performing any troubleshooting or clearing diagnostic trouble codes.
C. Wait at least 30 seconds in order for the diagnostic codes to become active.
Codes
Result: There is an active or there is a logged -13 code.
Proceed to Test Step 2.
2. Check for Debris
A. Turn the keyswitch to OFF.
B. Check the suspect sensor for debris. If applicable, check the reference sensor for debris. Check the sensor measurement port for blockage by debris.
C. If debris is found, clear the debris from the measurement port and replace the suspect sensor.
D. Turn the keyswitch to ON.
E. Check for -13 codes. Wait at least 30 seconds in order for the diagnostic codes to become active.
Note: The 2458-13 will not activate for several hours if the ambient temperature is below 7° C (45° F) or if an active regeneration has not been performed. If troubleshooting a 2458-13 and ambient temperature is below 7° C (45° F), perform a "Manual DPF regeneration" after completing the repair to verify that the problem has been resolved.
Debris
Result: There is an active or there is a logged -13 code. The sensor port is not blocked by debris.
Proceed to Test Step 3.
Result: A -13 code is not present. Return the unit to service.
Result: There are multiple -13 codes present and the codes have a reference sensor.
Repair: Replace the reference sensor. Verify that the problem is resolved.
3. Inspect the Sensor Connector for Moisture and/or Corrosion
A. Turn the keyswitch to OFF.
B. Disconnect the sensor connector.
C. Remove and check for any moisture with all connector components. Refer to Troubleshooting,