P0254 Code - Injection Pump Fuel Metering Control 'A' High

What Does p0254 Mean?

OBD-II Code Decreased engine performance is defined as a Injection Pump Fuel Metering Control "A" 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 P0254.

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What are the common causes of p0254 ?

• An air leak forward of the DPF will change the sensor readings resulting in the code
• Rusty exhaust systems, cracked exhaust manifolds or damaged or missing gaskets or donuts will cause air leaks.
• A large vacuum leak would cause a massive amount of un-metered air to enter the intake manifold resulting in an overly lean mixture.

How do you troubleshoot p0254 ?

Like the all engines, the car engine system employs specially developed hydraulic lifters (known as switching roller followers) for the P0254 code intake and exhaust valves. The lifters can be collapsed by disengaging an internal locking pin. The locking pin is disengaged using solenoids to alter oil pressure fed into the lifter.

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