The P0256 trouble code is associated with Injection Pump Fuel Metering Control B Malfunction (Cam Rotor Injector), indicating a potential issue with the fuel metering control in Injection Pump B, specifically related to the cam, rotor, or injector components. This code is commonly found in diesel engines with multiple injection pumps.
P0256 Injection Pump Fuel Metering Control B Malfunction (Cam/Rotor/Injector)
Code symptoms P0256.
1. Illuminated “Check Engine” or “Service Engine Soon” light on the dashboard.
2. Decreased engine performance.
3. Issues with fuel delivery or injection from Injection Pump B.
This code is common in brands such as:: Chevrolet, Renault, Ford, Toyota, Nissan, Mercedes Benz, Honda.
Causes of the code P0256.
1. Faulty components in the fuel metering control of Injection Pump B, such as the cam, rotor, or injector.
2. Wiring issues in the fuel metering control circuit of Injection Pump B.
3. Issues with the Engine Control Module (ECM).
Code Solutions P0256.
1. Inspect and replace components in the fuel metering control of Injection Pump B, including the cam, rotor, or injector, if malfunctioning.
2. Inspect wiring in the fuel metering control circuit of 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.