Symptoms of blocked diesel particulate filter

What Is a Diesel Particulate Filter (DPF)?

A Diesel Particulate Filter is a component of the exhaust system in diesel vehicles. Its primary function is to trap and remove soot and particulate matter produced during combustion. Over time, these particles can accumulate, and if the filter is not cleaned or regenerated, it can become blocked.

Blocked DPFs not only affect vehicle performance but can also lead to non-compliance with emissions standards, making it vital to address any issues promptly.

Common Symptoms of a Blocked DPF

If your vehicle’s DPF is blocked, you’ll likely notice one or more of the following symptoms:

1. Warning Light on the Dashboard

• Most modern vehicles are equipped with a DPF warning light. If the filter becomes blocked, the light will illuminate, alerting you to the issue.
• Ignoring this warning can lead to further complications.

2. Reduced Engine Performance

• A blocked DPF restricts exhaust flow, leading to a noticeable drop in engine power and responsiveness.
• Acceleration may feel sluggish, and the vehicle might struggle to maintain higher speeds.

3. Increased Fuel Consumption

• The engine compensates for the restricted exhaust flow by using more fuel. This results in poor fuel economy and increased running costs.

4. Unusual Exhaust Smoke

• A blocked DPF may cause thick, black smoke to exit the exhaust, particularly during acceleration.

5. Difficulty Starting the Engine

• A severely blocked DPF can lead to backpressure in the engine, making it hard to start the vehicle or causing it to stall.

6. Frequent Regeneration Cycles

• If your vehicle repeatedly attempts active regeneration (a process to burn off accumulated soot), it’s a sign the DPF is struggling to maintain efficiency.