Question about 2000 Chevrolet Silverado 1500

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Gas gauge quit working just shows low fuel light and noting on gauge even if tank is full

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This is a case of the sending unit being bad, this is very common on these trucks, this is like a toilet float, it floats inside the tank with a sensor at the base that controls the gauge, hope this helps,gas gauge quit working just shows low fuel light - 65a8465.jpg

Posted on Oct 24, 2010

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1 Answer

2013 Kia Optima. Fuel gauge shows 1/16th of a tank and the low fuel light is not on. Engine shut down. Out of gas. Add gas. Car starts up. What would cause the gauge to misread in this way?


most fuel gauge readings are not that accurate anyway so its out of fuel but not what the is guage reading. but the fuel level sensor in the tank may be at fault sound like its the prob but the instument pack should put the low fuel light on if its fitted on your vehicle spec but not always fitted even though the warning light is present hope this helps

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The sensor is part of the fuel pump module inside the gas tank.
The signal is sent to the body computer, so it could be a faulty module or a problem with the body computer.
The circuit would need to be checked with a meter.

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The low fuel light is on but even after putting gas in my 1999 Expedition, the fuel gauge still shows low fuel. What is the problem? how much gas is in the tank?


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1990 toyota camry gas gauge quit working


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1 Answer

1989 Saab 900 low level fuel light


You don;t say whether the fuel gauge is reading accurately, or whether it's always on empty. If the gauge is always showing empty, it's most likely a problem with the sending unit in the fuel tank. Check the resistance across the two terminals of the sending unit.

On a C900, the fuel sender level unit is separate from the fuel pump and located on the right side top of the tank, accessible by removing the trunk floor lift up panel (the pump is located on the left side top of the tank.
Possible problems are: electrical line off or broken, float not working (it's fairly delicate); or gauge not working.

Test the resistance of the sending unit with the lines disconnected, the resistance should be 2.6 to 3.8 ohms full tank, 63.3 to 67.5 ohms empty tank; and test for voltage across the top of the sender unit, if no voltage, that's likely the problem!

If the gauge is otherwise reading accurately (showing 'full' for a full tank, etc) then the problem is likely a gauge malfunction and can be simply replaced.

Good luck!

Saabreur

Jul 10, 2008 | 1989 Saab 900 4 Door

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