Urgency: Moderate
DPF Warning Light
Investigate soon. Driving short distances is generally okay, but book a diagnostic check.
What the DPF Warning Light Means
On your diesel your car, the DPF warning indicates the filter is full of soot, usually from lots of short, low-speed trips that never let it regenerate. A good long drive at speed often clears it.
Common Causes
- Too many short trips to complete a regen
- Faulty differential pressure sensor
- Low fuel level blocking active regen
- EGR or turbo fault increasing soot
- Wrong engine oil spec
How to Fix It
- Ensure you have at least a quarter tank of fuel
- Drive at steady motorway speed (around 40-60 mph) for 15-20 minutes
- Avoid short trips until the light clears
- If it will not clear, scan and check the pressure sensor
- Have a forced regeneration or filter clean done if needed
Related DTC Codes
| Code | Meaning |
|---|---|
P2002 | Diesel Particulate Filter Efficiency Below Threshold (Bank 1) The DPF is not trapping soot effectively or a differential pressure sensor is misreading. |
P244A | DPF Differential Pressure Too Low The pressure difference across the diesel particulate filter is lower than expected, suggesting a sensor or filter fault. |