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Fuel Tech Experts » DPF » What’s the difference between a DPF and a catalytic converter?

What's the difference between a DPF and a catalytic converter?

by FTE Published on Thursday, February 12th, 2026

What’s the difference between a DPF and a catalytic converter? Ever wondered why your car has both a Diesel Particulate Filter and a catalytic converter?

Having spent years helping drivers understand emissions, I can tell you they’re not as similar as you might think.

A Diesel Particulate Filter (DPF) captures soot particles from diesel exhaust, while a catalytic converter reduces harmful gases like carbon monoxide.

The DPF needs to regenerate by burning off soot at high temperatures.

If you’re facing DPF issues, ensuring proper regeneration conditions is a good first step.

The DPF relies on high exhaust temperatures, often around 600°C, to burn off soot effectively.

Catalytic converters, on the other hand, use chemical reactions to convert gases without requiring such high temperatures.

Keeping an eye on driving patterns can help maintain these systems.

I hope you found this useful.

If you’ve had issues with either system, feel free to share them.

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