P0260 indicates the powertrain control module has detected an intermittent or out-of-specification signal from the fuel metering control "B" circuit on a diesel injection pump. This circuit regulates how much fuel the injection pump delivers to the engine. An intermittent fault means the signal drops in and out rather than staying consistently high or low.
The metering control solenoid is the component most directly involved in the circuit. Internal coil degradation or valve sticking can produce an intermittent signal that the PCM flags as P0260.
Vibration, heat, and chafing can cause wires to break internally or short against metal components, creating an on-again/off-again circuit fault.
A poor terminal connection at the pump connector can introduce resistance or momentary signal loss, especially in environments exposed to moisture, salt, or oil contamination.
Wear inside the pump can make the metering mechanism respond inconsistently, causing the control circuit to fluctuate even if the electrical components are intact.
Although rare, a PCM driver or internal fault can misread or incorrectly command the metering control B circuit. This should only be considered after wiring and the pump-side components are ruled out.
It is not recommended. The engine may stall, hesitate, or fail to restart, particularly when hot or under load.
Not necessarily. Many cases are caused by a failing metering solenoid, damaged wiring, or a poor connector, which can often be repaired without replacing the entire pump.
No. PCM failure is genuinely uncommon for this code. Most diagnoses find a wiring, connector, or metering control component fault.
It is a secondary or redundant fuel-metering control circuit on the diesel injection pump; it works alongside Control A to regulate fuel delivery to the engine.