What usually causes P0088?

Pressure regulator or control valve, pressure sensor.

P0088Fuel rail/system pressure too high

P0088 means “Fuel rail/system pressure too high”. It's a generic powertrain code (fuel, air metering and emission controls), so it means the same on every make, including VW, Škoda, Audi, SEAT and Cupra.

Fix soon
SystemFuel system
TypeGeneric (same on all makes)
VCDS number16472

How urgent is it?

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

Which system and module

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

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

What usually causes it

Pressure regulator or control valve
pressure sensor

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.