Archives: DTC Codes

What Does Code P0255 Mean? DTC P0255 signifies an intermittent fault within the Fuel Metering Control circuit for the “A” bank of the injection pump system. The Engine Control Module (ECM), also known as the Powertrain Control Module (PCM), monitors the actual fuel quantity delivered by the high-pressure fuel pump (or injection pump) against the […]

What Does Code P0256 Mean? DTC P0256 signifies a detected malfunction within the Fuel Metering Control “B” circuit or component associated with the injection pump. This code specifically points to an issue with the mechanism responsible for precisely regulating the volume of fuel delivered to the high-pressure pumping elements of the fuel injection pump. In […]

What Does Code P0257 Mean? DTC P0257 signifies a detected deviation in the performance or range of the Fuel Metering Control “B” circuit within the high-pressure fuel injection system. This code specifically targets the electronic control of fuel volume entering the high-pressure injection pump’s pumping elements. In most modern diesel direct injection systems, the Engine […]

What Does Code P0258 Mean? DTC P0258 signifies an issue with the fuel metering control circuit for the “B” circuit within the injection pump system, indicating a consistently “Low” electrical input or output condition. This code typically pertains to diesel engines or gasoline direct injection (GDI) systems employing a high-pressure fuel pump (HPFP) with an […]

What Does Code P0259 Mean? DTC P0259 indicates an detected electrical or operational anomaly within the “B” circuit of the fuel injection pump’s metering control system, specifically signifying a “High” signal condition. The Engine Control Module (ECM), also known as the Powertrain Control Module (PCM), is responsible for precisely regulating the amount of fuel delivered […]

What Does Code P0260 Mean? The diagnostic trouble code P0260 signifies an intermittent fault within the Injection Pump Fuel Metering Control “B” circuit, specifically related to the internal cam, rotor, or injector control mechanisms of the high-pressure fuel pump system. The Engine Control Module (ECM) or Powertrain Control Module (PCM) monitors the precise operation of […]

What Does Code P0261 Mean? DTC P0261 signifies that the Engine Control Module (ECM), also commonly referred to as the Powertrain Control Module (PCM), has detected an abnormally low voltage condition or an open circuit within the control or power circuit of the fuel injector for Cylinder 1. Modern fuel injectors are essentially solenoid-operated valves […]

What Does Code P0262 Mean? DTC P0262 signifies that the Engine Control Module (ECM), also known as the Powertrain Control Module (PCM), has detected an electrical fault within the control circuit for the fuel injector on cylinder #1. Specifically, “Circuit High” indicates that the voltage observed by the ECM on the control side of the […]

What Does Code P0263 Mean? DTC P0263 signifies a “Cylinder 1 Contribution/Balance Fault.” This diagnostic trouble code is set by the Engine Control Module (ECM) or Powertrain Control Module (PCM) when it detects that Cylinder 1 is not contributing its expected share of power to the crankshaft’s rotation, or its contribution is significantly unbalanced compared […]

What Does Code P0264 Mean? The diagnostic trouble code P0264, “Cylinder 2 Injector Circuit Low”, indicates that the Engine Control Module (ECM), also known as the Powertrain Control Module (PCM), has detected an electrical anomaly within the fuel injector circuit for cylinder number 2. Specifically, the ECM monitors the voltage drop and current flow across […]