How to Master 4 Wire Lambda Sensor Wiring Diagrams for Flawless Performance
A 4-wire lambda sensor wiring diagram illustrates the connections between the lambda sensor and the vehicle’s electronic control unit (ECU). The four wires typically represent power, ground, signal, and heater. For instance, in a BMW 3 Series, the black wire is ground, the gray wire is the signal, the white wire is the heater, and the blue wire… Read More »