The P0257 trouble code is linked to Injection Pump Fuel Metering Control B Range o Performance (Injector), indicating a potential range or performance issue with the fuel metering control in Injection Pump B, specifically related to the injector component. This code is commonly found in diesel engines with multiple injection pumps.
P0257 Injection Pump Fuel Metering Control B Range/Performance Injector
Code symptoms P0257.
1. Illuminated “Check Engine” or “Service Engine Soon” light on the dashboard.
2. Decreased engine performance.
3. Issues with fuel delivery or injection from Injector in Injection Pump B.
This code is common in brands such as:: Chevrolet, Renault, Ford, Toyota, Nissan, Mercedes Benz, Honda.
Causes of the code P0257.
1. Out-of-range or poor performance of the injector in the fuel metering control of Injection Pump B.
2. Wiring issues in the fuel metering control circuit of Injector in Injection Pump B.
3. Issues with the Engine Control Module (ECM).
Code Solutions P0257.
1. Inspect and replace the injector in the fuel metering control of Injection Pump B if out of range or performing poorly.
2. Inspect wiring in the fuel metering control circuit of Injector in Injection Pump B and repair or replace damaged sections.
3. If ECM issues are suspected, consult a qualified technician for diagnosis and potential reprogramming or replacement.