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.
Related Driver Help
Related warning lights
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.