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Clogged DPF/FAP: symptoms, causes and solutions
- 22 August 2026
- Guides and Diagnostics
- Posted by
- Comments Off on Clogged DPF/FAP: symptoms, causes and solutions
A clogged DPF (or FAP) is one of the most common problems on modern diesels: DPF light on, loss of power, frequent regenerations and rising fuel consumption. It should be dealt with early to avoid an expensive replacement.
Symptoms
- DPF/FAP warning light on
- Reduced power
- Frequent or incomplete regenerations
- Rising fuel consumption
Why it clogs
Short urban trips prevent regeneration. A dirty EGR and poor injection make things worse.
Solutions
- Forced regeneration with a diagnostic tool
- Professional DPF cleaning
- Fixing the underlying causes
How MasterTuning helps
We diagnose the real condition of the DPF, carry out a regeneration or cleaning and fix the causes, saving you the replacement. Centres throughout Italy.
