OBD code P2002

The DPF is not trapping or managing particulate matter as expected by the ECU.

Estimated severity

Medium

Common symptoms

Check engine light or DPF warning
Power loss if the filter is restricted
Frequent or interrupted regenerations
Higher fuel consumption
Possible smoke if the filter is physically damaged

Likely causes

DPF saturated with soot or ash
DPF cracked or internally damaged
Differential pressure sensor or hoses faulty
Repeated short trips preventing regeneration
EGR, injector or turbo faults increasing soot load

Recommended checks

1. Read DPF soot load, ash load and differential pressure with a scanner.
2. Check differential pressure sensor hoses for blockage or cracks.
3. Review whether regenerations are completing or being interrupted.
4. Check for root causes that create excess soot, such as injectors, EGR or turbo faults.
5. Do not force regeneration if ash load or pressure is dangerously high.

What does code P2002 mean?

P2002 indicates the diesel particulate filter is not performing as expected. It can appear when the DPF is cracked, removed or saturated, but also when the differential pressure sensor or its pipes give incorrect readings. It is important for commercial vehicles because failed regeneration can end in limp mode and workshop downtime.

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