A blocked DPF has restricted flow because soot or ash loading is too high, or because the vehicle is not completing regeneration correctly.
What does it mean?
A blocked DPF has restricted flow because soot or ash loading is too high, or because the vehicle is not completing regeneration correctly.
Symptoms to look for
Symptoms can include a DPF light, poor performance, frequent fan operation, increased fuel use, smoke or limp mode.
Possible causes
Failed regens, unsuitable driving patterns, pressure or temperature sensors, fuelling faults, boost leaks and ash accumulation are possible causes.
What diagnostics check
Checks include differential pressure under operating conditions, soot and ash calculations, sensor plausibility, temperatures and the cause of failed regeneration.
What should happen next?
A forced regeneration is not always safe or successful. S7 Remaps can establish whether regeneration, cleaning, repair or replacement is appropriate. 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.