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How to switch to the auxiliary fuel tank when the main tank is empty?

2 Answers

Rodger

08/30/25 4:16am

You can switch between the main and auxiliary fuel tanks using the toggle button on the driver's left control panel. Here are the specific steps for switching from the main tank to the auxiliary tank: 1. For regular vehicles: The main/auxiliary tank toggle button usually features a "SUB+fuel pump" symbol. Pressing this button will switch the vehicle to the auxiliary tank, and fuel supply will then be provided by the auxiliary tank. 2. For some trucks: The main/auxiliary tank toggle button on certain trucks is labeled "AUXILIARYFUELTANK". Pressing this button will activate fuel supply from the auxiliary tank.

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VanJulian

09/11/25 8:16am

When the main fuel tank is empty, if my car has an auxiliary fuel tank system, the first thing I would do is find a safe place to stop and turn off the engine to avoid any danger during the operation. Then, I would look for a dedicated fuel tank selection button or knob on the dashboard or center console, usually labeled "Fuel Tank" or "Main/Auxiliary Switch." I would switch it to the auxiliary tank position and wait about half a minute for the fuel pump to transfer the fuel, as the fuel line needs time to refill. After that, I would restart the car, and the fuel gauge should display the level of the auxiliary tank. As a habit, I make it a point to glance at the fuel gauge every few hundred kilometers to avoid running the main tank dry. However, it's worth noting that many sedans and compact SUVs nowadays don’t come with an auxiliary fuel tank. So, if the dashboard doesn’t have this function, the only options are to call for a tow truck or manually add fuel.

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