The DPF sensor measures the pressure drop across a DPF. A DPF pressure drop increases with increase in the soot mass accumulated in the DPF. Small soot mass accumulation results in lower DPF pressure drop, while high soot mass accumulation would yield higher DPF pressure.

P2452 – Particulate Filter Differential pressure sensor malfunction

P2453 – Diesel Particulate Filter Differential pressure sensor malfunction

P2454 – Diesel Particulate Filter Differential pressure sensor voltage too low

P2455 – Diesel Particulate Filter Differential pressure sensor malfunction

Symptoms can be loss of power, reduced fuel economy, poor throttle response, limp home mode, these are some causes, mis calculating the soot content in the DPF.

This is sensor is very important to the DPF system, if the sensor is not reading or sending the correct signals the DPF can become blocked quickly.

These sensors vary in price, some makes and models can be expensive depending on type.

You can replace the sensor, once replaced if the sensor is not adapted/programmed to the vehicle, the ecu will think the old sensor is still fitted, if not fitted correctly can cause further issues and cause your DPF to block.

It is best practice to replace the sensor once a new DPF is fitted.