P1271 fault code: what it means

P1271: Fuel regulator circuit (EDU drive) on a D-4D diesel: electrical fault driving the rail pressure discharge valve.

Engine and gearbox (powertrain) · Costly if missed

Usual causes, most likely first

discharge valve wiring fault
failed pressure discharge valve
EDU fault

P1271 by make

Toyota

Fuel regulator circuit (EDU drive) on a D-4D diesel: electrical fault driving the rail pressure discharge valve.

Usual causes: discharge valve wiring fault; failed pressure discharge valve; EDU fault

What the repair usually costs

High-pressure fuel pump (GDI petrol or common-rail diesel)NZ$1,140–NZ$4,280 · A$1,060–A$3,800

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Before you clear it

Write the code down or photograph the scanner first. A code that comes straight back after clearing points to a fault that is still there. A car whose codes were cleared just before you arrived may be hiding one: the scanner's readiness monitors show "not ready" for a while after codes are cleared.

Researched by Credov from manufacturer and workshop sources. A fault code points to where a fault may be; a workshop confirms it with a diagnosis. Browse all fault codes.