Question about 2005 Mitsubishi Lancer

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The gas gauge reads empty and gas light is on even when gas tank is full

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This problem is caused by a defective gas tank sending unit for the gage and the low fuel light, replace the sending unit.

Posted on Aug 23, 2010

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The best solution is that the fuel sending unit is bad. It sits in the gas tank and meteres the fuel level. I would get an estimate, as these can be a tough job, as some need to have the fuel tank removed, and some have an access panel.

Posted on Aug 23, 2010

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1 Answer

Fuel gauge not working


You will need to test a number of things, the fuel gauge is part of a rather simple circuit.

Battery -> gauge -> tank sensor -> chassis ground to battery

If the circuit is broken at any of the steps, your gauge will read "empty". If the tank sensor is bad, it could read empty, or if the float in the tank has sunk, it will read empty.

I start at the gauge with a "test light" that glows when it sees battery voltage. Get a light at the connection to the gauge? Good. find the sensor connection, usually on top of the tank, accessible in the trunk. Probe with test light. Light on? Good. Connect wire to ground, gauge should read "full". If all that is as I said, then the tank sensor is bad. If you don't read battery at any step, you know where the problem is.

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2002 Saturn VUE Gas gauge reads empty with a full tank of gas. What is problem?


possible blowen fuse or a bad sending unit inside fuel tank also check the connections at the tank

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the problem is caused by a defective gas gauge sending unit, this part is located inside the gas tank, you must remove the gas tank to replace it.

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1993 Jeep Grand Cherokee gas gauge reads empty but tank is full.


Fuel level sending units are known to go bad on these.

Jun 13, 2009 | 1999 Jeep Grand Cherokee

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Even with a full tank my 2005 Envoy XUV fuel light stays on and fuel gauge marks empty


u need to change this gauge or try to dissasseble and clean it very well then try to install it back again

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Gas gauge reading empty even when tank is full


Usually if the gas gage does not work yes it is true it may be the sensor if it is electronicly controlled. the sncor will more than likley be in the tank. here is how to remove your gas tank.

  1. Before servicing the vehicle, refer to the precautions section.
  2. Relieve fuel system pressure.
  3. Drain the fuel tank.
  4. Remove or disconnect the following:
    • Negative battery cable
    • Fuel filler and vent hoses
    • Fuel tank skid plate
    • Fuel tank wiring connectors
    • Fuel supply and return lines
    • Fuel tank
    • Fuel pump assembly
      7924bg17.gif Fuel pump assembly mounting
To install:
  1. Install or connect the following:
    • Fuel pump assembly
    • Fuel tank. Tighten the bolts to 27 ft. lbs. (36 Nm).
    • Fuel supply and return lines
    • Fuel tank wiring connectors
    • Fuel tank skid plate
    • Fuel filler and vent hoses
    • Negative battery cable
  2. Start the engine and check for leaks.

Apr 16, 2009 | 2002 Isuzu Axiom

1 Answer

Gas gauge


Sounds like you have a bare or broken wire earthing out on the chassis/body Trace the wires from the tank back to the engine bay and check that the wires are intact.

Nov 02, 2008 | 1995 Dodge Dakota

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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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