Signal wire shorted to ground; Open 5 V reference circuit; Faulty differential pressure sensor; Corroded or damaged connector.

Diesel particulate filter (DPF)

P2454 Diesel Particulate Filter (DPF) Pressure Sensor A Circuit Low

The ECU monitors the voltage of the DPF differential pressure sensor. P2454 is set when the signal stays below the minimum expected voltage.

Common causes

Signal wire shorted to ground
Open 5 V reference circuit
Faulty differential pressure sensor
Corroded or damaged connector

Typical symptoms

Check engine light (MIL) on
Regeneration disabled
Reduced power or limp mode on some vehicles

P2454 and NuoVolta

When the DPF and its pressure sensor have been removed for off-road or motorsport use, where permitted by law, the NuoVolta DPF / ADV Removal solution adjusts the ECU calibration and the DTC removal feature can disable this code. Otherwise, check the sensor wiring and supply first.

DPF / ADV Removal Available for 189 ECUs

Related codes

P2002Particulate Filter Efficiency Below Threshold (Bank 1) P242FDiesel Particulate Filter (DPF) Restriction - Ash Accumulation P244ADiesel Particulate Filter (DPF) Differential Pressure Too Low (Bank 1) P244BDiesel Particulate Filter (DPF) Differential Pressure Too High (Bank 1) P2453Diesel Particulate Filter (DPF) Pressure Sensor A Circuit Range/Performance P2455Diesel Particulate Filter (DPF) Pressure Sensor A Circuit High P2458Diesel Particulate Filter (DPF) Regeneration Duration P2459Diesel Particulate Filter (DPF) Regeneration Frequency

Diagnose and repair real faults first. Removing or disabling emission systems is only permitted where allowed by law, for example for off-road or motorsport use.