What usually causes P2459?

Regenerating too often: oil dilution, sensor, high soot output.

P2459Diesel particulate filter regeneration frequency

P2459 means “Diesel particulate filter regeneration frequency”. It's a generic powertrain code (auxiliary emission controls), so it means the same on every make, including VW, Škoda, Audi, SEAT and Cupra.

Fix soon
SystemEmissions
TypeGeneric (same on all makes)

How urgent is it?

Worth fixing soon; usually drivable meanwhile, but watch for symptoms.

Which system and module

Scanline files it under Emissions. The first letter, P, means powertrain (engine, transmission, emissions).

Usually stored by the engine control unit (VCDS address 01, Engine).

What usually causes it

Regenerating too often: oil dilution
sensor
high soot output

Typical causes are a starting point, not a diagnosis of your car.

What a shop would usually check first

The driving pattern (short trips stop regeneration) and the DPF pressure sensor and its hoses.

Related codes

Got this code on your car?

Paste your whole scan into Scanline to see which faults are current and which are old news. It runs in your browser; nothing is uploaded.

Open Scanline

Scanline explains fault codes; it isn't a repair authority. This page explains what the code means; it can't tell you what is wrong with your car. Ross-Tech's wiki has their own notes on VW Group faults.