Question about 1999 Ford Expedition

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I filled my gas tank and my low fuel light is on & my gauge indicates low fuel also, help!!!

My low fuel light is on, but i there is a full tank of gas. the fuel hand also indicates low fuel. truck starts & runs fine...

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  • Expert
  • 245 Answers

Clean the ground to the body at the battery.

Posted on Feb 15, 2012

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5 Suggested Answers

6ya6ya
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Posted on Jan 02, 2017

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whispers76
  • 55 Answers

SOURCE: Gas Gauge not reading correctly

The most likely culprit is the sending unit in the tank. They are relatively easy to change, as long as you don't have much fuel in the tank. It's a mechanical unit that has a float that raises and lowers with the fuel level, however with age, the floats can develop leaks and no longer float, of the electronic portion of the unit can go bad and not register the proper level. They are replaced and an entire unit, so it doesn't matter which happened, you will need to change the fuel tank sending unit.

Posted on Jan 11, 2009

  • 1 Answer

SOURCE: Fuel gauge registers empty after fill up

It sounds to me like you have a short in your wiring harness at you fuel tank. there is a plug on top of your fuel tank that controls you fuel pump and your sending unit that tells you how much fuel is in the tank. This plug can be a real p.i.a to get to on some vehicles, you may have to take the vehicle to a shop to fix it, if you are not mechanically inclined.

Posted on Mar 03, 2009

emissionwiz
  • 76132 Answers

SOURCE: filling gas tank

There is a vent pipe that runs along the fill pipe, they get kinked and cause this concern (tank can't vent air when filling), the only fix is to replace the fill pipe assembly.

Posted on Nov 14, 2008

sscullys
  • 984 Answers

SOURCE: After filling my fuel tank, gauge does not go to

There is a TSB on high sulfur fuel usage, and how it impacts the fuel level resistance.
If you change fuel, it might start working again. The TSB is : ERRATIC FUEL GAUGE OPERATION TSB 08-2-9

Publication Date: January 22, 2008
FORD: 2004-2008 F-150
LINCOLN: 2006-2008 Mark LT


ISSUE:
Some 2004-2008 F-150 and 2006-2008 Mark LT vehicles, built before 12/3/2007, may exhibit erratic fuel gauge operation or illuminated malfunction indicator lamp (MIL) with diagnostic trouble codes (DTCs) P0460 or P0463, and/or Instrument Cluster Module DTC B1201. This may be caused by sulfur contamination in the fuel causing an open or high resistance in the fuel level sender.

ACTION:
Follow the Service Procedure steps to correct the condition.

SERVICE PROCEDURE

Install a new fuel level sender following the service procedure instruction sheet provided in the fuel sender kit.

PART NUMBER PART NAME
8L3Z-9A213-E Kit - Fuel Sender (2006 starting 12/8/2005 through 2008 - FFV-26 Gal Tank - 126/132" WB )
8L3Z-9A213-F Kit - Fuel Sender (2006 starting 12/8/2005 through 2008 - FFV-30 Gal Tank - 139" WB)
8L3Z-9A213-G Kit - Fuel Sender (2006 starting 12/8/2005 through 2008 - FFV-27 Gal Tank - 145/151/163" WB
8L3Z-9A213-H Kit - Fuel Sender (2006 starting 12/8/2005 through 2008 - FFV-36 Gal Tank - 145/151/163" WB
8L3Z-9A213-A Kit - Fuel Sender (2004 through 2008 - Gas-26 Gal Tank - 126/132" WB
8L3Z-9A213-B Kit - Fuel Sender (2004 through 2008 - Gas-30 Gal Tank - 139" WB
8L3Z-9A213-C Kit - Fuel Sender (2004 through 2008 - Gas-27 Gal Tank - 145/151/163" WB
8L3Z-9A213-D Kit - Fuel Sender (2004 through 2008 - Gas-36 Gal Tank - 145/151/163"WB



WARRANTY STATUS:
Eligible Under Provisions Of New Vehicle Limited Warranty Coverage And Emissions Warranty Coverage
IMPORTANT: Warranty coverage limits/policies are not altered by a TSB. Warranty coverage limits are determined by the identified causal part.

OPERATION DESCRIPTION TIME
080209A 2004-2008 F-150, 2006-2008 Mark LT: Install New Fuel Level Sender, Includes Time To Remove And Install Fuel Tank (Do Not Use With 9002A, 9002A4, 9002A6) 1.9 Hrs.

DEALER CODING
BASIC PART NO. CONDITION CODE
9A299 42

Posted on Apr 26, 2010

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2006 Chevy Colorado Truck. Gas tank filled and fuel gauge indicator dropped to 1/4 full, when truck is idling fuel gauge drops to empty and low fuel light comes on. Suggestions? Thank you.


Check and or test fuel gauge sending unit and the gauge . Videos on youtube showing how to . Also i would have the vehicle checked for DTC's - diagnostic trouble codes . You may want to think about taking to a qualified repair shop .

Fuel Gage
The instrument panel cluster (IPC) displays the fuel level as determined by the engine control module (ECM). The IPC receives a serial data message from the BCM indicating the fuel level percent. The fuel gage defaults to empty if:
• The ECM detects a malfunction in the fuel level sensor circuit.
• The IPC detects a loss of serial data communications with the BCM.
• The BCM detects a loss of serial data communications with the ECM.

DTC P0461
The fuel level sender changes resistance based on fuel level. The powertrain control module (PCM) monitors the signal circuit of the fuel level sender in order to determine fuel level. When the fuel tank is full, the sender resistance is low and the PCM senses a low signal voltage. When the fuel tank is empty, the sender resistance is high and the PCM senses a high signal voltage. The PCM uses the signal circuit of the fuel level sender in order to calculate the total remaining fuel percent in the tank. The PCM sends the fuel level percent via the class 2 serial data circuit to the instrument cluster in order to control the fuel gage. The fuel level information is also used for misfire and evaporative emission (EVAP) diagnostics.

DTC P0462 Fuel Level Sensor Circuit Low Voltage
DTC P0463 Fuel Level Sensor Circuit High Voltage

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Town and Country Van running out of gas and guage says half a tank what could be the problem?


If your fuel gauge is showing you in accurate readings this is normal to all vehicles that are not used to fill-up gas full regularly but sometimes the cause of the inacuracy is due to faulty float valve in the gas tank you need to replace it

May 09, 2014 | 2005 Chrysler Town & Country

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I have a 1992 Mercury Grand Marquis Ls with a fuel gauge that does not work (gauge may be reversed)??? help please.


The fuel level indicating system is a magnetic type system, which consists of the sending unit located in the fuel tank, an anti-slosh module located on the back of the instrument cluster, and a fuel gauge located in the instrument cluster. The sending unit changes resistance according to the level of fuel in the fuel tank, which varies the current flow through the gauge.The pointer position varies proportionately to the current flow. In this system, the sending unit resistance is low (22 ohms) when the fuel level is low and high( 145 ohms) when the fuel level is high. The pointer of the magnetic gauge remains in position when the ignition is turned to the Off position. On some models, an anti-slosh module is used to dampen out fluctuating fuel signals from the sender. Some vehicles are equipped with a low fuel warning indicator. The anti-slosh module will also actuate the low fuel indicator when the fuel level in the tank reaches 1/16 to 1/8 full.


Do your other gauges/warning indicators work properly with the ignition on? If not, check for power at the fuse panel/fuses.

If they do then partially remove your cluster with connector still installed and check for voltage at cluster connector and gauge. Check continuity of cluster and gauge for ground.

Sometimes the anti-slosh module (if installed) goes bad in the Grand Marquis but not likely.

Sender troubleshooting:
  1. Perform test with resistors as follows:
    1. Disconnect wiring connector at sender unit, then connect resistor between gauge lead and a suitable ground.
    2. Turn ignition switch to On position.
    3. With 145 ohm resistor, the gauge pointer should contact the Full mark.
    4. With 22 ohm resistor, the gauge pointer should contact the Empty mark.
  1. Perform test with fuel sender of known quality as follows:
    1. Turn ignition to Off position.
    2. Disconnect wiring connector from sender and connect it to test sender.
    3. Move float rod away from fuel filter against Full stop position. Wait approximately 30 seconds, then turn ignition switch to On position. The gauge should read on or above the Full mark.
    4. Move float rod toward fuel filter against Empty stop position. Turn ignition switch to Off position. Wait approximately 30 seconds, then turn ignition switch to On position. The gauge should read on or below the Empty mark. If gauge works properly replace sender, which involves dropping fuel tank.

Mar 23, 2013 | 1992 Mercury Grand Marquis

1 Answer

Low gas indicator light does not come on when guage is on E


The fuel pump is kept cool by the fuel in the tank. It is rare for a Toyota fuel pump to fail but if your running it that low on gas your not helping last any longer. I would suggest not letting your tank get below a quarter tank. That way you will never have to worry about whether or not the light will come on. Typical there would be about a gallon or less of fuel in the tank before the light would come on. If it did come on you would have about 20 miles r so of fuel left in the tank.

Sep 04, 2012 | Toyota Cars & Trucks

1 Answer

Stop at gas station after driving 250 miles in my 2000 s10 extreme and pump shuts off like tank is full after 3 gallons of gas go in...should take 11 or so gallons. Also gas gauge stays on full and will...


sounds like you have a restriction in the fuel inlet pipe,( maybe air locking) also your tank sender unit neads replacing to fix you gauge fault, or it maybe that it has something that is not alowingf it to move freely inside the tank, have a good look inside when low on fuel. through the hole where the sender is fitted.

Sep 30, 2010 | Chevrolet S 10 Cars & Trucks

1 Answer

Clicking noise when i turn a/c on for back passengers using the dial above me in front. after awhile will stop, but once i turn off the a/c & turn it on it clicks again. also had trouble w/gas gauge...


The clicking sound when you turn on the A/C is typical of a system that is a little low on Freon(R134/R12). The compressor kicks in just for a moment to build up pressure then off quickly if it is low since there is a pressure sensor in the system, then builds up again & off. After several times it gets enough Freon working within the system to keep it running so it must be right at the bare minimum level to keep it running at all or it wouldn't even kick on. You'll need to inspect the lines & system for oily areas near the valves & such to identify a leak. Generally you can get some of the local shops to perform a basic system test for a reasonable price. There are aftermarket repair kits that will help identify the leak by using a dye & they generally provide basic instructions with the products.

Fuel ecoonomy: Tires aired properly will help, so will a new air filter, good Synthetic Oil in the engine, using a little fuel iinjector cleaner, and making sure any tune-up that is due, has been done. (a K&N air filter though a bit expensive initially, will save you fuel & give you better performance as well as saviing you $$$ in the long run. 2 types for most cars, OEM style fits without any other modificatioins & a complete replacement assembly that replaces hoses & mounts & such.

Fuel gauge: The gauge only reads based upon the sending unit in the tank, and the calibration of the gauge you see in your instrument panel. It is not unusual for it to take a fairly long time for the gauge to read 100% after a fill up. The system is designed to be slow so as not to cause needle movement when you go up a hill, or down a hill & such. If it actually does end up giving you a good reading as the end result & does indicate when the tank is low you may want to live with it. Or, you could have it tested or replaced but it will possibly require removing the fuel tank, fuel pump assembly & possbly part of your dash if the gauge must be tested also. good luck

Feb 02, 2010 | 2003 Ford Explorer

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Full tank of gas and getting low fuel indicator on dash


Bad fuel level sensor. Unfortunately it is located inside the gas tank. Fairly common problem on GM's. Due to sulphur in fuel. Corrodes the sensor tabs. Expensive to have repalced and NOT a do-it-yourself project, unless you have dropped a tank before.

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2 Answers

Check engine light comes on after refueling the vhicle. gauge doesn't read full, then it will. light goes out after a day or two.


Also, be sure to not over-fill the gas tank. When filling the tank, when it sounds full (you can hear gas gush up the filler neck) and when the filler clicks off the first time...don't be tempted to keep clicking more gas into the tank because over-filling can cause a variety of problems (including setting the light) and can eventually saturate/ruin the fuel vapor canisters.

Jul 28, 2009 | 2008 Chevrolet Uplander

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I have a 1994 dodge ram 1500 slt. and the gas gage will not read the amount of gas in the gas tank and gas light stays on when I know the tank is full. leaving me wondering how much gas i run on sometimes....


The problem is with the sensor inside the gas tank since the method of indication used is by passing an electric current & the resistance to that current is a measure of level of liquid in the tank , i.e. the gauge consists of two parts:
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  • The indicator
The sensing unit usually uses a float connected to a potentiometer. As the tank empties, the float drops and slides a moving contact along the resistor, increasing its resistance. In addition, when the resistance is at a certain point, it will also turn on a "low fuel" light on some vehicles.
However if this float gets stuck to the bottom of the tank or a leak fills up the float making it sink to the bottom of the tank, thus always indicating 'E' for empty.........................sodeep

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