The fuel pump relay is responsible for supplying power to the fuel pump, which pumps fuel from the fuel tank to the engine. If the fuel pump relay fails or malfunctions, the fuel pump will not receive power and will not be able to pump fuel to the engine. This can result in the engine not starting or running properly.
When the engine is not running or not receiving enough fuel, the fuel gauge may not provide accurate readings. The fuel gauge relies on a fuel level sensor in the fuel tank to determine the amount of fuel in the tank. If the engine is not running or not receiving enough fuel, the fuel level sensor may not be able to accurately measure the fuel level, and the fuel gauge may display incorrect readings.
Therefore, while the fuel pump relay does not directly control the fuel gauge, its malfunction can indirectly affect the accuracy of the fuel gauge readings.
