DTC P0201 - P0204 INJECTOR CIRCUIT (CYL 1 - CYL 4) - Component Description / CONSULT-II Reference Value / ECM Terminals and Reference Value

The fuel injector is a small, precise solenoid valve. When the ECM supplies a ground to the injector circuit, the coil in the injector is energized. The energized coil pulls the needle valve back and allows fuel to flow through the injector into the intake manifold. The amount of fuel injected depends upon the injection pulse duration. Pulse duration is the length of time the injector remains open. The ECM controls the injection pulse duration based on engine fuel needs.

Specification data are reference values and are measured between each terminal and ground.