Fuel gauge not working properly

If your fuel gauge isn't working , it's not a fuse ! The gauge or the sending unit in the fuel tank is bad . If you had other thing's not working in the instrument cluster I would say probably a fuse. There is not a fuse just for the fuel gauge . Fuel Gauge Tech How To Properly Diagnose Faulty Fuel Pump Sending Unit

Well it could be the sending unit in the fuel take or it could be the gauge in the dash ! I had a Cadillac Seville I was checking at the dealer I worked at , hooked up the tester an tested the gauge . The gauge worked fine so I pulled the fuel tank an put in a new sending unit. It work fine so I sent the vehicle on home , two days later it was back for the same problem . I pulled the tank again an the fuel pump Assemble an noticed the baffle in the bottom of the tank had come lose wedged under the float arm of the sending unit ! That's what was wrong , it wouldn't go below half a tank . I 'm not saying this is your problem because this was back in the 80's an they used metal fuel tanks ! Yours is more then likely plastic !

Now a days you can hook - up a scan tool an check it !

1. Install a scan tool.
2. Turn ON the ignition, with the engine OFF.
3. With a scan tool, observe the fuel level parameter in the Powertrain Control Module data list.

Does the scan tool indicate that the fuel level parameter is within the specified range?
3%-98%
Hope this helps you out !
Fuel Gauge Tech How To Properly Diagnose Faulty Fuel Pump Sending Unit http://youtu.be/RukBuYYwxIA

clean the coil in sender unit

More than likely the fuel sender in tank, but try connections, if it works when full or in between its sender

Yes, the sending unit is in the tank. If you unplug the connector at the tank and ground the gauge's sender unit wire to metal, with key on, the dash gauge should jump to full or near full. This verifies the dash gauge is working properly, and the problem is with the sender unit in the tank. If the gauge doesn't move when grounded, then the gauge or wiring from tank to gauge is not correct.
Good luck.

Could be 3 thing - the gauge on the dash, the wiring or the fuel level indicator in the tank. All three are not easily accessible - the best test would be to measure the voltage on the level sensor on the tank.

It usually means removing the fuel tank and start measuring. If its ok, supply voltage to the lead towards the fuel gauge. If the gauge doesn't move it's wiring or the fuel gauge itself.

NHTSA 10V075000
Feb 26,2010

Units Effected 80689

Fuel System, Gasoline Storage Aux,Tank

Nissan Is Recalling 2006 thru 2008 Frontier,Exterra and Pathfinder Vehicles
for deformed molded fuel tank,causing fuel gauge to show one quarter tank


Dealer will replace fuel sending unit with modified float arm

Recall to begin March 22,2010



www.nhtsa.gov

you have 2 recalls
pcm update fuel pump replacement
fuel pump module replacement and pcm software

There could be two problems here:
1. That buoy floating tank is not working properly
2. That the electrical system that fails to submit the dashboard.

Review this information:
- ZJ-Secc-8E-Instrument-Cluster-and-Gauges
Page 2 - Fuel Gauges description
Page 4 - Voltimeter/Tachometer/Fuel Gauge/Low Fuel Inoperative
Page 10 - Specifications
- ZJ-Secc-14-Fuel-System
About Fuel Tank components
- ZJ-Secc-8W-Wiring-Diagrams
Fuel Tank and Gauge & Sensor Units Sending (Page 93 and next)

Good luck... and remember rated this help.

Sounds like the Fuel sender unit in the fuel tank needs replacing however you may want to check that the electrical plugs are contacting properly,Check that the gauge is working by putting a piece of wire from the sender unit wire to the chassis,at the fuel tank sender unit plug,Turn ignition on while watching gauge if it moves toward fill turn ignition off and remove wire to chassis.If gauge moves it means from the fuel tank to fuel gauge is intact and not your problem.