MasterTuning Fault code dictionary (DTC)

P2452 — DPF pressure sensor: implausible signal

Severity: Warning Can you drive? Yes, no known limitation Make: All makes (OBD-II standard)
MeaningThe sensor measuring the pressure difference across the filter is reporting an implausible value. The filter itself is often healthy and the fault lies in the sensor or its small pipes.
FamilyPowertrain (P)

Typical symptoms

Engine warning light on
No regeneration, or constant regeneration
Reduced power in some cases

Common causes

Measuring pipes blocked with soot or disconnected
Faulty sensor
Corroded wiring or connector

What to do

Check the sensor and its pipes before touching the filter: it is a cheap repair, and replacing the DPF without this check is the most expensive mistake possible on this code.

Frequently asked questions

What does code P2452 mean?

DPF pressure sensor: implausible signal. The sensor measuring the pressure difference across the filter is reporting an implausible value. The filter itself is often healthy and the fault lies in the sensor or its small pipes.

Can I keep driving with code P2452 active?

Yes, no known limitation

Common causes — P2452

Measuring pipes blocked with soot or disconnected Faulty sensor Corroded wiring or connector

How do you fix code P2452?

Check the sensor and its pipes before touching the filter: it is a cheap repair, and replacing the DPF without this check is the most expensive mistake possible on this code.

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