P0193 fault code: what it means

P0193: Fuel rail pressure sensor signal is too high.

Engine and gearbox (powertrain) · Costly if missed

Usual causes, most likely first

faulty fuel rail pressure sensor
wiring open or shorted to voltage
corroded sensor connector
pressure regulator letting pressure rise

P0193 by make

Isuzu

Fuel rail pressure sensor circuit high.

Usual causes: faulty rail pressure sensor; open wiring

Mitsubishi

Rail pressure sensor signal high.

Usual causes: faulty rail pressure sensor; wiring open circuit or connector fault

What the repair usually costs

CVT valve body replacement (remanufactured, in car)NZ$1,280–NZ$2,420 · A$1,200–A$2,400
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 P0193 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.