We have recently purchased a used 2001 Toyota Sienna. When we fill it with gas, the gas gauge does not go above 1/3 full. It will stay there until the tank gets below 1/3, then goes down accordingly. Is this an indication of a float problem, gauge problem or something else?
SOURCE: Fuel and temp sensor problem toyota corolla two door 1989
Find the temperature sensor(usually around the thermostat housing)'disconnect connector and ground it with a test light. Observe the inside gauge. It should slowly go up. If so, change sensor. Do the same for the fuel gauge located on the fuel tank. If gauge move to fill as you groung the sending unit wire, change sending unit. Test the right wire. Ask for further assistance.
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