Diesel Particulate Filter Light

Dashboard Warning Lights Caution (amber)

Can you still drive? With care, short trips only

Who can fix it? Needs a workshop

Typical repair time 30 minutes – 8 hours

Cost level Very high In the Saudi market: SAR 250–12,000 (≈ USD 67–3,200)

What it means

Found on diesel cars and shown in amber as a box with dots between two pipes, this light means the diesel particulate filter (DPF) is loaded with more soot than normal and has not been able to clean itself by burning it off. The exact symbol and messages vary a little between makes. It is normal for it to glow briefly at key-on and then go out.

Codes that may appear with it

The most common stored codes that may turn this light on; scan the car with an OBD reader to find the actual code.

Symptoms4

The light comes on after repeated short city trips.
Loss of power or limp mode if the blockage gets worse.
The fan runs after the engine is switched off, and idle speed rises during a regeneration attempt.
A faint burning smell or higher fuel consumption.

Possible causes6

Short, slow trips that do not let regeneration (burning off soot) finish.
Regeneration interrupted by switching the engine off several times.
Faulty DPF differential pressure sensor or its hoses.
Extra smoke from faulty injectors, the EGR valve or the turbocharger.
Engine oil that does not meet the diesel specification, adding ash to the filter.
End of filter life from ash buildup that cannot be burned off.

How to diagnose6

Read the owner's manual for what to do when the light comes on; it usually asks for a sustained highway drive.
Make sure the check engine or glow plug light is not also on.
Read the codes, the estimated soot load and the differential pressure reading with a scan tool.
Inspect the differential pressure sensor hoses for cracks or blockage.
Look for the cause of extra smoke, such as injectors or the EGR valve, before cleaning the filter.
If regeneration fails, the workshop decides on a forced regeneration, cleaning or replacement.

How to fix6

Drive steadily on a highway as the owner's manual describes until the light goes out.
Repair the differential pressure sensor or its hoses if the reading is wrong.
Fix the cause of extra smoke, such as injectors or the EGR valve.
Run a forced regeneration with a scan tool at a workshop.
Clean the filter off the car or replace it if it is full of ash.
Clear the codes and confirm the next regeneration completes without the light.

Repair cost

Cost levelVery high

Low

Medium

High

Very high

In the Saudi market: SAR 250–12,000 (≈ USD 67–3,200)

Our prices come from the Saudi market, converted at a fixed rate (SAR 3.75 per USD). Prices in your country may differ a lot, so we show the cost level.

If a drive or a forced regeneration solves it the cost is low, while off-car cleaning or a new filter pushes the price much higher.

Prices are rough estimates for common cars at independent workshops and vary with the car and the source of the part.
Prices last updated: September 2026

Frequently asked questions

How can I clear the DPF light myself?

In most cases a sustained highway drive, as described in the owner's manual, raises exhaust temperature and burns off the soot. If the light stays on or the check engine light appears, go to a workshop.

Is removing the filter a solution?

No. Removing it breaks emission rules and causes faults and codes. The right fix is to cure the cause of the blockage and clean or replace the filter.

Why does the light keep coming back?

Usually because of short trips, a fault that adds smoke such as injectors or the EGR valve, or a differential pressure sensor giving false readings.

Was this explanation helpful?

Tap the stars to rate; you can change it later.

Report a mistake

Spotted something inaccurate? Tell us and we will review and correct it.