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

P0259 Injection Pump Fuel Metering Control B High (Cam/Rotor/Injector)

Check engine lightOn
EmissionsRelevant
Drive cycleRequired
Limp modePossible

Fuel metering actuator B is a second electrically controlled metering valve on a diesel injection pump; A has the codes P0251–P0255. P0259 means its circuit reads high or draws too much current – a short to voltage or a shorted turn. Saab's 3.0 V6 diesel, whose pump has two metering valves, uses it for an internal short in one of the valves lasting over 2.1 s: limp mode with limited pedal response, injection quantity and rail pressure (60 MPa), and the warning light if it recurs on the next trip. GM and Ford use other codes for this part (P0090–P0092, P0001–P0004).

Likely causes

Metering valve B shorted internally
Control wire to the valve shorted to voltage, chafing
Connector at the valve corroded or wet
Driver stage in the engine module faulty

Symptoms

  • Check engine light on
  • Limp mode with limited power and speed
  • Hard starting, engine may stall

Repair estimate

DifficultyHardWorkshop job
Parts and labour€150–1,200
Time1–4 h

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

Parts involved

fuel metering actuator bhigh pressure fuel pumpactuator wiring

Related codes

P0256P0257P0258P0260P0254P0090

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