The differential pressure sensor estimates restriction by comparing pressure before and after the DPF through small pipes and hoses.
What does it mean?
The differential pressure sensor estimates restriction by comparing pressure before and after the DPF through small pipes and hoses.
Symptoms to look for
A sensor or hose fault can cause a DPF warning, inaccurate soot calculation, failed regeneration or limp mode.
Possible causes
Blocked sensor pipes, split hoses, wiring, sensor drift and a genuinely restricted filter can produce similar readings.
What diagnostics check
Diagnosis compares pressure readings at rest and under load with engine speed, temperatures and calculated soot load.
What should happen next?
Replacing the sensor without checking its hoses and the filter can miss the real fault. S7 Remaps can test the system before recommending parts. Do not use a software change to hide an unresolved mechanical or emissions-system fault. A proper diagnosis should establish the cause before a solution is chosen.
Related DPF support
Read the main DPF diagnostics and solutions service for mobile support across Preston, Lancashire and relevant nearby areas.
Frequently Asked Questions
It can. The exact warning depends on the vehicle and fault, so the stored codes and live data need to be interpreted rather than guessed from the dashboard message.