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P0257 Severity
Identifying an OBD code is just the start of a complete diagnostic routine. Most trouble codes are caused by a sensor reporting a value that is out of range. Just replacing a sensor may not fix underlying issues. Be sure to understand the code, the part or system in your car that the code refers to, and the risks of delaying professional repair.
Proper diagnosis will save you time and money on unnecessary repairs.
Urgent codes indicate immediate action is necessary. These are urgent and significant malfunctions that can cause severe damage to the vehicle or harm the driver and passengers.
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 P0257.
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OBD-II Code Decreased engine performance is defined as a Injection Pump Fuel Metering Control "B" Range/Performance
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 P0257.