Make: International
Engine: MaxxForce DT (2010 & Newer)
PID: N/A
SPN: 3246
FMI: 7
Description: DPFOT not warming along with engine
Troubleshooting:
The Diesel Particulate Filter Outlet Temperature (DPFOT) sensor measures the temperature of
the outlet temperature of the Diesel Particulate Filter. The Diesel Particulate Filter Outlet
Temperature (DPFOT) works with the Diesel Oxidation Catalyst Inlet Temperature (DOCIT),
Diesel Oxidation Catalyst Outlet Temperature (DOCOT), and Diesel Particulate Filter
Differential Pressure (DPFDP) sensors to operate and control the regeneration cycles of the
Aftertreatment system.
Probable causes:
1) Biased DPFOT circuit or sensor
Make: International
Engine: MaxxForce DT (2010 & Newer)
PID: N/A
SPN: 3246
FMI: 20
Description: DPFOT signal drifted HIGH
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) Restricted Diesel Particulate Filter (DPF)
2) Diesel Oxidation Catalyst (DOC) failure
3) Engine over fueling
4) Downstream Injection over fueling
5) Biased Diesel Particulate Filter Outlet Temperature (DPFOT) sensor or circuit
Make: International
Engine: MaxxForce DT (2010 & Newer)
PID: N/A
SPN: 3246
FMI: 21
Description: DPFOT signal drifted low
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) DPFOT sensor not connected to exhaust system
2) Exhaust system not attached to the engine
3) High resistance connections to DPFOT sensor
Make: International
Engine: MaxxForce DT (2010 & Newer)
PID: N/A
SPN: 3251
FMI: 0
Description: DPFDP excessively high (plugged filter)
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) Restricted or plugged filter
2) Biased Diesel Particulate Filter Differential Pressure (DPFDP) sensor or circuit
3) Reversed DPF sensor hoses