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Old 03-15-2018, 05:35 AM
Fender4145 Fender4145 is offline
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2004 Sentra
 
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Default Gas gauge reading incorrectly

So back in June of 2017 I bought a 2004 Nissan Sentra. Ever since I bought it, the gas gauge has been off by a bit, but to the point where I can read it. Up until last month I have filled it up all the way and after 80 miles it will show it is down to 1/4 tank. I usually get between 200-250 miles out of a tank. Is there a way to reset the gauge or could it be something else?
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Old 03-15-2018, 06:02 PM
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smj999smj smj999smj is offline
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2006 Pathfinder
2003 Frontier King Cab
2003 Frontier KC SVE 4x4
 
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You probably have a bad fuel level sending unit in the tank. Usually to test the circuit and gauge, one will unplug the harness connector at the top of the tank, identify and ground the wire from the gauge to the sender and turn the key "on." The fuel gauge should slowly move from empty to full. If that's okay, then the sending unit in the tank is typically at fault. If the needle doesn't go all the way full, then it could be a bad gauge. I can't be sure without looking it up, but the fuel gauge is likely integral to the cluster assembly, meaning the whole cluster would need to be sent out for repair or replaced (assuming one doesn't try fixing it himself). The sending unit is more likely the problem, however.
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