Diesel particulate filter (DPF) light
A dotted box or exhaust-filter symbol on a diesel.
GET CHECKED SOON
Get it looked at soon · Amber means get it checked
What it means
A DPF traps soot from diesel exhaust and periodically burns it off (regeneration). This light means soot has built up and the filter needs to regenerate — frequently because the car has only done short, low-speed trips.
What to try
Where safe and legal, a steady drive at higher speed for 15–20 minutes often lets it complete a regeneration and the light goes out. If it does not clear, or other lights join it, get it checked before it blocks fully.
Why not ignore it
A fully blocked DPF can force a limp mode and a costly forced regeneration or replacement.
Warning-light symbols and meanings vary by vehicle - always check your owner’s manual. This is general guidance based on what the light indicates, not a physical inspection, and a light on its own never names a failed part.
Want to know what is causing the warning?
Auto Star can read the codes, inspect the vehicle, and find the underlying cause before recommending any repairs - you see what we find and approve the work first.