What is the reason for the P3073 fuel pump circuit electrical fault?
1 Answers
P3073 fuel pump circuit electrical fault indicates an open/short circuit in the connection/wiring between the fuel pump and fuel pump controller. Below is relevant information about the fuel pump: 1. Introduction to fuel pump: The fuel pump is a professional term in the automotive parts industry. It is one of the basic components of the fuel injection system in electronically controlled vehicles, located inside the fuel tank. The fuel pump operates during startup and while the engine is running. If the engine stops but the ignition switch remains ON, the HFM-SFI control module cuts power to the fuel pump to prevent accidental ignition. 2. Function of fuel pump: The fuel pump's role is to draw fuel from the fuel tank, pressurize it, and deliver it to the fuel supply line, working in conjunction with the fuel pressure regulator to establish a certain fuel pressure.