Soot Level in Diesel Particulate Filter
Indicates that the soot level in the DPF is above the normal operating range.
Heads up: this code wasn't in our hand-written library yet, so DiagCoach AI built this page on the fly. Double-check critical specs against service info before condemning parts.
What it means (plain English)
The module is seeing more soot in the DPF than it should, meaning it's getting clogged and needs attention.
What the computer is actually seeing
The engine control module (ECM) is tracking soot levels based on pressure, typically 3.5 to 7 kPa, and temperature readings from the DPF.
What a healthy reading looks like
Soot level should be below 20% capacity of the DPF; any reading above indicates an issue.
Guided diagnostic — the DiagCoach way
Don't just throw parts at it. Walk through these in order — each step tells you whether to keep going or stop and fix what you found.
- 11. Check the DPF pressure sensor wiring and connector for damage or corrosion. Repair as needed. Decision point: If wiring is good, proceed.
- 22. Verify the soot level using a scan tool. If readings are above 20%, proceed to next step. Decision point: If below, the issue may be intermittent or related to a different system.
- 33. Conduct a manual regeneration of the DPF. Check if soot level decreases after the regeneration. Decision point: If soot level lowers, monitor vehicle for recurrence.
- 44. Inspect fuel injectors for leaks or improper spray patterns. Replace if necessary. Decision point: If all tests pass yet the light returns, consider replacing the DPF.
Common causes
- Clogged diesel particulate filter
- Faulty pressure sensors
- Excessive fuel injector leakage
- Infrequent regeneration cycles
Typical repair cost
$$$
Related codes
Frequently asked questions
Is it safe to drive with this code?
It's drivable but may lead to reduced performance and fuel efficiency. Fix soon.
Will this code come back after clearing?
If the underlying issue isn't resolved, yes, it will return.
Why does this code appear with other DPF codes?
They often indicate a related issue with back pressure or regeneration failures.
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