Make: International
Engine: MaxxForce DT (2010 & Newer)
PID: N/A
SPN: 3251
FMI: 2
Description: DPFDP signal erratic, intermittent, or incorrect
Troubleshooting:
The purpose of the Aftertreatment (AFT) System is to catalyze carbon monoxide (CO), Oxides
of Nitrogen (NOx), and Hydrocarbons (HC). The Diesel Particulate Filter (DPF) will capture
soot and other particulates exiting the exhaust pipe. Once the DPF is full, it is heated and the
soot trapped inside is burned more efficiently than an exhaust system without an AFT system.
Probable causes:
1) Biased DPFDP sensor or circuit
2) Restricted or plugged DPF
3) Reversed DPF sensor hoses
Make: International
Engine: MaxxForce DT (2010 & Newer)
PID: N/A
SPN: 3251
FMI: 3
Description: DPFDP signal Out of Range HIGH
Troubleshooting:
The Diesel Particulate Filter Differential Pressure (DPFDP) sensor measures the difference
between the inlet and outlet pressures of the DPF
Probable Causes:
1) DPFDP signal circuit short to battery
2) Failed DPFDP sensor
Make: International
Engine: MaxxForce DT (2010 & Newer)
PID: N/A
SPN: 3251
FMI: 4
Description: DPFDP signal Out of Range LOW
Troubleshooting:
The Diesel Particulate Filter Differential Pressure (DPFDP) sensor measures the difference
between the inlet and outlet pressures of the DPF
Probable Causes:
1) Reversed DPFDP sensor hoses
2) DPFDP sensor connector open
3) DPFDP VREF open
4) DPFDP signal open
5) Failed DPFDP sensor
Page
Make: International
Engine: MaxxForce DT (2010 & Newer)
PID: N/A
SPN: 3251
FMI: 10
Description: DPFDP in range stuck fault
Troubleshooting:
The Diesel Particulate Filter Differential Pressure (DPFDP) sensor measures the difference
between the inlet and outlet pressures of the DPF
Probable Causes:
1) DPFDP sensor tubes restricted or open
2) Biased DPFDP circuit or sensor