How to fix high soot level fault codes on my Paccar MX engine.

Опубликовано: 30 Август 2026
на канале: OTR Performance
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Understanding fault codes is crucial for maintaining your truck's performance, especially those related to the DPF filter. Here are three key fault codes you should be aware of:

Fault Code: P3798
Details:
SPN: 3251
FMI: 16

This code indicates a high soot level in your truck. If you see this code (or SPN 3251 FMI 16) on your dash, your truck's soot level is high, and you need to perform a parked regeneration to avoid engine derate.

What This Means:

High Soot Level: Your truck’s DPF filter is full of soot.

Engine Derate: Your engine will reduce power if not addressed.

Action Needed: Perform a parked regeneration.

Why It Happens:
DPF Pressure Sensor: This sensor measures the pressure in your DPF filter to determine soot levels. Faults here can trigger high soot codes.

Watch Full Video Here:    • How to diagnose and fix common DPF filter ...  
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