P0002 fault code: what it means

P0002: Fuel volume regulator (pump suction control valve) not controlling rail pressure as expected. Rough running, power loss or limp mode on the diesel.

Engine and gearbox (powertrain) · Costly if missed

Usual causes, most likely first

worn or sticking suction control valve
contaminated or watery fuel
blocked fuel filter
weak lift pump

P0002 by make

Ford

Fuel volume regulator (pump suction control valve) not controlling rail pressure as expected. Rough running, power loss or limp mode on the diesel.

Usual causes: worn or sticking suction control valve; contaminated or watery fuel; blocked fuel filter; weak lift pump

GWM

GWM diesel ute: fuel volume regulator (pump suction control valve) range/performance.

Usual causes: worn or sticking SCV; dirty fuel; blocked filter

LDV

LDV diesel: fuel volume regulator (pump suction control valve) range/performance.

Usual causes: worn or sticking SCV; dirty fuel; blocked filter

What the repair usually costs

Automatic transmission rebuild, 6-speed and up (sent to specialist)NZ$7,190–NZ$13,080 · A$6,190–A$11,830
DSG / dual-clutch mechatronic unit replacement (new or reman)NZ$4,300–NZ$7,160 · A$3,750–A$6,390
DSG mechatronic repair / rebuild (unit sent to specialist)NZ$2,070–NZ$4,800 · A$1,890–A$4,250
A/C compressor replace incl. drier and flush (European)NZ$1,560–NZ$3,200 · A$1,490–A$3,050

Not sure what P0002 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.