What usually causes P0325?

Knock sensor, wiring, connector.

P0325Knock sensor 1 circuit (bank 1)

P0325 means “Knock sensor 1 circuit (bank 1)”. It's a generic powertrain code (ignition system or misfire), so it means the same on every make, including VW, Škoda, Audi, SEAT and Cupra.

Fix soon
SystemIgnition
TypeGeneric (same on all makes)
VCDS number16709

How urgent is it?

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

Which system and module

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

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

What usually causes it

Knock sensor
wiring
connector

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

Related codes

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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.