Question about 2004 Ford Taurus

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Fuel gage not working properly. also computer reading that gives you miles to go before empty is not working.

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This issue is almost always the sending unit in the tank, Test that, which is not so easy because of access. You have to drop the tank to get at it.

Posted on Mar 24, 2011

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Posted on Jan 02, 2017

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I have a 2015ford Taurus. the gas gauge and miles to empty moves on its own. I filled it up this morning and 30 minutes later it only had 3/4 tank and the miles to empty had fallen.


The sending unit on the fuel pump is bad. It sends a signal to the gage to tell the fuel level. The reason the mileage is moving is because the sending unit is miss reading the fuel level. The sending unit for the fuel level is in the fuel tank.

Apr 13, 2017 | Ford Cars & Trucks

2 Answers

2004 trailblazer...fuel guage tags full when empty....rears Reads empty when full...changed fuel sending unit...no fix....replaced instrument cluster....no fix. Help


Have the vehicle check for DTC'S - diagnostic trouble codes ! The sending unit is an input to the PCM - engine computer . The PCM sends this info to the instrument cluster over class 2 serial data network . Do you know anything about class 2 communication's network . The ideal way to diagnose a problem like this , check for codes , view data on scan tool . Buick Class 2 Operation Diagnosis 1998

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 ECM 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 ECM.
When the fuel level is less than a pre-determined value, the IPC illuminates the low fuel indicator.

DTC P0463

Install a scan tool.
Turn the ignition ON, with engine OFF.
With the scan tool, observe one of the following fuel level parameters:
• Fuel Level Sensor parameter in the PCM Enhanced EVAP data list.
• Fuel Level Sensor parameter in the PCM EVAP data list - 4.2L only.
Does the scan tool indicate that the Fuel Level Sensor parameter is less than the specified value?

Feb 19, 2017 | Cars & Trucks

1 Answer

Chrysler sebring gauge


The fuel gage problem is either from a bad ground to the gage or the sending unit in the tank is bad. They will normally read a half tank or less when the car is full if the sending unit goes bad. I would put a scanner on the computer and check for any codes set.

Apr 22, 2017 | Cars & Trucks

1 Answer

Fuel gage showing half a tank but trip computer only registering 60 miles left


Its very simple. If the gauge is showing half full then fill the tank and see how much fuel it takes. If the amount you add is approximately 50 percent of the fuel tank capacity then you know the fuel gauge is accurate . In that case the computer is giving an inaccurate reading and should be ignored. All you need is an accurate fuel gauge - it does not matter a row of beans what the computer says if the fuel gauge is reading correctly.

Dec 22, 2012 | Saab Cars & Trucks

1 Answer

Fuel gage does not work. The gage will read full but after driving for about 30 miles it will read empty & the light chimes on.


sounds like a bad float / sensor or just a bad ground.
Check the connections where the fuel pump goes into the gas tank. Make sure the ground is good and solid and not rusty. If wiring is good the float is probably bad

May 18, 2011 | 2000 Buick Century

1 Answer

Fuel gage is not working properly. It is currently reading empty but the tank is full. Check gage lamp is on due to this.


first check that -ve cable of battery is good contact with body and motor ,if not the float of fuel tank may be hange or need to be replaced.

Apr 04, 2011 | 1999 Ford Explorer

1 Answer

Fuel guage not working


Testing the fuel gage requires accessing the harness from the fuel pump and grounding the yellow / white wire with 160 ohms resistance this should cause the gage to read full, and with the circuit open you should have the gage reading empty. If the gage works in this order then the likely failure is the sending unit in the tank , and will require replacement.

May 30, 2010 | 1999 Ford Expedition

2 Answers

I have a 94 chevy s10 and my gas reads empty while i drive.but when i shut off the truck the gauge moves to different readings.


Is......the problem--"the gas gage reads empty when there is fuel in the tank. OR, The gage moves when the key to turned off ?

If it's the first,
You will need to test the gage and through process of elimination, determin if the Sending unit inside the fuel tank has gone Bad.

If its the second ? - Electrical gauges will move when powered down. Normal

Testing the gauge may not be easy - just depends on your ability.
It is a simple 2-wire gauge circuit, when disconnect (usually need the fuel tank) the gage reads in one direction (either full or empty)
then when shorted-the gage reads in oppisite direction.

Of course you must select the correct wires or you may short out the wrong circuits!! Most GM vehicles use a purple wire & black wire.

A quick method I have used to check the in-take part of the gauge is this.
1st. know there is gas - 1/2 tank works best.
2nd driver's door open, key in run position, engine not running.
3rd gently lift up on the door then let if come back down, gently.
just enough to cause the gas to slosh around.
4th - keep an eye on the gas gage, a bad sending unit in the take will show up as a "twitchy" needle.

Of course, if the gage never leaves empty - sloshing won't work.
I have a known good sending unit I can plug into the vehicle and simulate different levels of fuel - if the gas gage works, I know the problem is in the tank.

Let us know.

Dave

Feb 28, 2009 | 1996 GMC Sonoma

2 Answers

1996 Plymouth Grand Voyager Fuel Gage issue


It sounds like the fuel level sending unit located on the fuel pump is malfunctioning. The solution for this is to have it replaced. You can do this yourself but I wouldn't recommend it as the vehicle needs to be lifted and the fuel tank needs to be dropped out. This can be preformed for about 100-150 in most shops.

Jan 20, 2009 | 1996 Plymouth Voyager

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