Amber light
Diesel Particulate Filter Light
The diesel particulate filter is filling with soot and needs to regenerate, or has a fault.
High risk
Drive soon at a steady higher speed so the filter can clean itself. Ignoring it can block the filter and reduce power.
Short answer · How do I clear the DPF warning light?
Usually by letting the filter regenerate: drive for 15 to 20 minutes at a steady speed above about 60 km/h, for example on a motorway, without switching off. Check the owner's manual for the exact conditions. If the light stays on or the engine goes into limp mode, a workshop needs to diagnose the cause.
What to do
- Drive to regenerateA steady drive at higher speed burns off the soot.
- Avoid short trips for nowMany short trips are the main reason filters clog.
- Get it checked if it stays onSensor faults or a full filter need a diagnosis.A blocked filter can overheat if forced to regenerate without checks.
How is the light behaving?
| What you see | What it usually means | What to do |
|---|---|---|
| Steady | The filter is filling up | Drive at steady higher speed soon |
| Flashing | Filter heavily loaded or faulty on some cars | Have it checked soon |
Possible causes
- Mainly short tripsThe filter never gets hot enough to regenerate.
- Pressure sensor faultWrong readings trigger the warning.
- Engine fault producing sootInjectors, EGR or turbo problems create extra soot.
- Low additive on some carsSome systems need a fuel additive.
Don't confuse it with
Questions about Diesel Particulate Filter Light
Is DPF cleaning or removal legal?
Cleaning is legal. Removing the filter is illegal for road use in many countries and fails inspections.