Powertrain, generic · Fuel and air metering (injector circuit)

P0252 Injection Pump Fuel Metering Control A Range/Performance (Cam/Rotor/Injector)

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modePossible

These codes cover the electrically controlled fuel metering actuator on a diesel injection pump. On older distributor pumps it was a solenoid that set the injected quantity; on common rail it is usually an inlet metering valve on the high-pressure pump that lets only as much fuel into the pumping elements as the rail needs, instead of spilling the excess through a pressure valve. Manufacturers use different codes for this part: Ford P0001–P0004, GM Duramax P0090–P0092. P0252 is the range or performance fault of actuator A, and the meaning depends on the maker. Saab's 2011 9-5 diesel sets it when the driver stage of the pump pressure regulator overheats – a sign of a shorted turn or excessive current – with the warning light at once; Ford checks the same under P0002 at a driver temperature above 170 °C. Generally the code can also mean the actuator does not achieve the expected effect.

Likely causes

Metering actuator with shorted turns, too low resistance (driver overheats)
Actuator mechanically sticking or dirty (fuel quality, wear debris)
Wiring with contact resistance
Driver stage in the engine module faulty

Symptoms

  • Check engine light on
  • Loss of power, limp mode
  • Fluctuating rail pressure, hunting idle

Repair estimate

DifficultyMediumWorkshop job
Parts and labour€100–2,500
Time0.5–6 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

fuel metering actuator ahigh pressure fuel pumpactuator wiring

Related codes

P0251P0253P0254P0257P0002P0089

References: law.cornell.edu, saabwisonline.com, fordservicecontent.com.