P0259 Code - Injection Pump Fuel Metering Control 'B' Low

What Does P0259 Mean?

OBD-II Code Decreased engine performance is defined as a Injection Pump Fuel Metering Control "B" High (Cam/Rotor/Injector)
The Fuel Injection Pump supplies high pressure fuel to the fuel injectors. Output pressure from this pump is controlled by the Fuel Pump Control Actuator. When the engine control module (PCM) detects an incorrect signal from the Fuel Injection Pump Actuator, the PCM sets code P0259.

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What are the common causes of P0259 ?

There are a few causes for the P0259 code. The most common are a defective fuel pump, a clogged or dirty fuel filter, open or shorted circuits or electrical connectors between the PCM and the fuel control actuator, or a faulty fuel control actuator driver in your vehicle’s PCM.



How do you troubleshoot P0259 ?

The engine system, in conjuction with the engine control module (ECM)/powertrain control module (PCM), activates the P0259 code solenoid valve to control oil pressure to the engine mechanism that is installed in the valve system to switch valve timing between Low and High.If the engine solenoid valve has an open or short circuit, a DTC is stored.

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