What is the cause of the P3073 fuel pump circuit electrical fault?

1 Answers
DelJoel
07/30/25 10:50am
P3073 fuel pump circuit electrical fault is caused by an open/short circuit in the connection/wiring between the fuel pump and the fuel pump controller. Below is an introduction to the fuel pump: Introduction to the 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 electronic fuel injection vehicles, located inside the vehicle's fuel tank. The fuel pump operates during startup and while the engine is running. If the engine stops but the ignition switch remains in the ON position, the HFM-SFI control module shuts off the power to the fuel pump to prevent accidental ignition. Function of the fuel pump: The fuel pump's function 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.
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