How to switch to the auxiliary fuel tank when the main tank is empty?
3 Answers
You can switch between the main and auxiliary fuel tanks using the toggle button on the driver's left control panel. Below is a detailed explanation of how to switch from the main tank to the auxiliary tank: 1. For regular vehicles: The main/auxiliary fuel 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 fuel tank toggle button in certain trucks is labeled "AUXILIARY-FUEL-TANK." Pressing this button will activate fuel supply from the auxiliary tank.
If the main fuel tank runs out of gas, switching to the auxiliary tank is actually quite straightforward. Having driven for over a decade, I always check the status of both fuel tanks before any long-distance trip. First, find a safe spot to pull over and turn off the engine. Then, locate a dedicated switch inside the cabin—usually near the left side of the dashboard or the center console—which could be a button, lever, or rotary knob depending on the vehicle model. Turn the key to the ACC position (halfway), gently toggle the switch, and the auxiliary fuel supply system will activate. Wait a few seconds to confirm the fuel pump is working properly before restarting the engine for a test drive. The auxiliary tank is mainly designed to reduce refueling frequency during long trips, so always keep it filled to avoid emergencies. Once, I neglected to check it on the highway, and even after switching, it was empty, resulting in a clogged fuel pump that needed repairs. I recommend inspecting the auxiliary tank’s fuel quality and wiring during regular maintenance to prevent clogging due to dust or oxidation. Never attempt to switch while driving to avoid sudden loss of control risks.
During that self-driving trip, my main fuel tank ran dry, but luckily the auxiliary tank saved the day. The switching operation is super simple: locate the auxiliary tank switch in the car (usually a small button below the steering wheel or near the foot mat), press or flip it after stopping and turning off the engine. Then restart the car to see if the dashboard indicator lights up. Many older off-road vehicles come with this feature, and I often joke that it's like a backup battery—ready to kick in at critical moments. But don’t get careless and forget to refuel after switching—monitor the auxiliary tank’s fuel level too, either through the car’s dashboard or manual checks. Make it a habit to regularly fill both tanks to avoid the embarrassment of pushing the car mid-trip. Safety tip: when switching to the auxiliary tank, ensure a quiet environment to listen for the fuel pump sound; if there’s any unusual noise indicating a malfunction, pull over and seek help immediately. This quick operation can save you from major trouble.
