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P2002: meaning, causes and solutions
- 22 August 2026
- OBD Fault Codes
- Posted by MasterTuning
- Comments Off on P2002: meaning, causes and solutions
Fault code P2002 means particulate filter efficiency below threshold. The ECU calculates that the DPF no longer traps particulates as it should, or that its state is not consistent with the expected values.
Typical symptoms
- DPF light and engine light on
- Loss of power
- Frequent or failed regenerations
- Rising consumption
Most common causes
- Particulate filter actually damaged or hollowed out
- Differential pressure sensor or its connecting pipes clogged
- Exhaust temperature sensors out of tolerance
- Regenerations repeatedly interrupted
- Injection or EGR producing more soot than expected
How it is checked in diagnosis
- Reading filter load and differential pressure
- Checking the differential sensor pipes (often blocked)
- Checking temperatures before and after the filter
- Regeneration history
Can you drive with code P2002?
Yes, to reach the workshop, but if the filter is heavily loaded the car limits power.
How MasterTuning helps
We read the real values from the ECU, not just the code: that is the difference between identifying the component responsible and replacing parts by trial and error. After the repair we clear the fault and check that it does not come back. Centres throughout Italy.
Do you have code P2002 on your car? Book a diagnosis at your nearest MasterTuning centre.
Frequently asked questions
What does fault code P2002 mean?
Code P2002 means particulate filter efficiency below threshold. The ECU calculates that the DPF no longer traps particulates as it should, or that its state is not consistent with the expected values.
Can you drive with fault P2002?
Yes, to reach the workshop, but if the filter is heavily loaded the car limits power.
Is clearing code P2002 enough to fix it?
No: if the cause is still present the code comes back after a few kilometres. Clearing should only be done after the repair, with the diagnostic tool.
How much does it cost to fix code P2002?
It depends on the component responsible: the diagnosis is precisely what identifies it with real measurements, avoiding unnecessary replacements that cost far more than the correct repair.
