P0089 fault code: what it means

P0089: The fuel pressure regulator is not holding the pressure the engine computer commands.

Engine and gearbox (powertrain) · Costly if missed

Usual causes, most likely first

sticking or worn fuel pressure regulator / control valve
faulty diesel fuel metering valve
blocked fuel filter or weak lift pump
air in the fuel system

P0089 by make

Ford

Fuel pressure regulator performance: rail pressure is not following the computer's commands. On the 3.2 Ranger it usually points to the pump's metering valve.

Usual causes: worn or sticking suction control valve on the high-pressure pump; fuel rail pressure sensor; blocked fuel filter

Isuzu

Fuel pressure regulator (suction control valve) performance. Rail pressure isn't following the commanded value; surging or stalling.

Usual causes: sticking suction control valve (SCV); contaminated or poor fuel; worn supply pump

Mazda

Mazda petrol SkyActiv-G: high-pressure pump spill valve not controlling pressure. Diesel SkyActiv-D: rail pressure too high.

Usual causes: high-pressure fuel pump / spill valve solenoid (petrol); fuel pressure sensor; pump connector or wiring; fuel pressure relief valve (diesel)

Mitsubishi

Fuel pressure regulation fault. On the 4D56 Triton this is the suction control valve stuck: actual rail pressure does not follow the target.

Usual causes: worn or stuck suction control valve (needs pump relearn after fitting); dirty or water-contaminated fuel; blocked fuel filter

Nissan

Diesel fuel pressure regulator performance: rail pressure not following the target (YD25).

Usual causes: suction control valve (SCV) fault or fitted wrong way; fuel pump relearn not done after ECU reset; rail pressure relief valve fault; aftermarket tuning chip

What the repair usually costs

CVT valve body replacement (remanufactured, in car)NZ$1,280–NZ$2,420 · A$1,200–A$2,400
A/C compressor replace incl. drier and flush (European)NZ$1,560–NZ$3,200 · A$1,490–A$3,050
High-pressure fuel pump (GDI petrol or common-rail diesel)NZ$1,140–NZ$4,280 · A$1,060–A$3,800
Full / logbook service (SUV / diesel ute / 4WD)NZ$410–NZ$800 · A$400–A$780

Not sure what P0089 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.