P0257 Code - Injection Pump Fuel Metering Control 'B' Range/Performance

What Does P0257 Mean?

The oxygen (02) sensors on your car measure the oxygen in the exhaust to determine how rich or lean the ratio of fuel and air are in the cylinders. Optimizing this mixture means better fuel economy and fewer exhaust emissions. When you see P0257 engine fault code on your engine code reader this description will help you.

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What are the common causes of P0257 ?

Common causes include a dirty or clogged fuel filter, a defective fuel pump, open or shorted circuits or electrical connectors between the fuel control actuator and the PCM, or a faulty fuel control actuator driver in the PCM.



How do you troubleshoot P0257 ?

Check to make sure they are not burnt or corroded. If in doubt, get some Electrical Contact cleaner at any parts store if cleaning of the terminals is needed. With the valve disconnected, the red voltmeter lead should be attached to the IMRC valve power wire and the black voltmeter lead connected to ground.

Process Tips

Diagnostic trouble code P0257 is not difficult to diagnose and repair. Thus, it always pays to have a qualified technician to look after your vehicle should this error code arise.

Diagnosing this code requires the engine to be in good running shape, without unmetered air entering the engine. If other codes that relates to misfiring condition, lean running or air entering the engine is present, then you must first fix those error codes before P0257.

Fortunately, P0257 is a fairly common OBD code, meaning that it applies to all makes and models of vehicles made after 1996.

Searches related to P0257 Code - Injection Pump Fuel Metering Control 'B' Range/Performance

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