Code Definition

P0255 — Injection Pump Fuel Metering Control Circuit A Intermittent

System: Powertrain  |  Type: Generic (OBD-II Standard)  |  Make: Generic

About P0255

P0255 is a generic (obd-ii standard) powertrain diagnostic trouble code. It belongs to the P-prefix family of codes, which covers engine, transmission, emissions, or fuel-system faults.

When P0255 is stored, the module has detected an electrical-circuit fault in the wiring, connector, or driver associated with the named component.

Scanning & clearing: A generic OBD-II scan tool will usually read and clear powertrain (P) codes. For live data, freeze-frame capture, and bi-directional tests you may need a more capable scan tool that supports the vehicle's ECM protocol.

Because P0255 is a generic OBD-II code, its base definition is shared across manufacturers. The specific diagnostic steps, reference values, and repair procedures can vary by vehicle, and the TaT Diagnostic Assistant includes verified procedures submitted by working technicians.

Code Information

The P0255 fault code is set when the powertrain control module (PCM) detects an intermittent or erratic signal from the fuel metering control circuit (Control A) of the injection pump. This indicates inconsistent operation, which may result from electrical disruptions or mechanical malfunctions affecting the circuit or the fuel control actuator.

Quick Facts