Code result
P0257
Injection Pump Fuel Metering Control B Range/Performance
High severity
What it means
Injection Pump Fuel Metering Control B Range/Performance (Cam/Rotor/Injector): the signal is implausible or outside the valid range. This affects fueling of the associated cylinders.
Is it safe to drive?
No — stop driving
This code can put the vehicle into limp or reduced-power mode. Avoid extended driving and have the vehicle diagnosed promptly.
Most likely causes
Actuator B drifted
highOne of the most commonly reported causes for this code — check this first.
Sensor element aged beyond calibration window
lowLess common, but worth ruling out after the more likely causes.
Sensor mounting loose - signal damping
lowLess common, but worth ruling out after the more likely causes.
Related help
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