P0094 fault code: what it means

P0094: GWM diesel ute: small fuel leak: rail pressure falls slowly.

Engine and gearbox (powertrain) · Costly if missed

Usual causes, most likely first

injector return or seal leak
weeping fitting

P0094 by make

GWM

GWM diesel ute: small fuel leak: rail pressure falls slowly.

Usual causes: injector return or seal leak; weeping fitting

Isuzu

Small fuel system leak: rail pressure drops slowly. Look for diesel seepage at lines and injectors.

Usual causes: leaking injector return or seal; weeping high-pressure fitting; pump leak

LDV

LDV diesel: small fuel leak: rail pressure falls slowly.

Usual causes: injector return or seal leak; weeping fitting

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

Not sure what P0094 means on your car? Ask Credov.

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.