Diesel Particulate Filter (Dpf) - Moderate Brick Shift - Navistar MaxxForce DT Diagnostic Manual

16.1.8. Diesel Particulate Filter (DPF) - Moderate Brick Shift

1. Diesel Particulate Filter Outlet
Temperature (DPFOT) sensor
Figure 53 Diesel Particulate Filter (DPF) - Moderate Brick Shift.
Appearance
Cause
Action
The DPF brick has shifted and made contact with the DPFOT sensor port bung, but has
not damaged the DPF substrate.
Excessive soot accumulation caused by a base engine concern, resulting in higher than
normal exhaust back pressure.
Determine and repair the root cause of the excessive exhaust back pressure. Once the
root cause is repaired, perform the DPF snap acceleration test. If no black smoke is
seen during the snap acceleration test, the DPF can be reused.
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