Question about 2002 Isuzu Axiom

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LOW GAS SIGNAL FLASH EVEN WHEN THE TANK IS FULL

WHEN I FILL UP THE GAS TANK THE LOW GAS SIGNAL FLASHES ON THE INSTRUMENT PANEL.

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The gas pump is going out, change gas pump

Posted on Nov 08, 2008

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Posted on Jan 02, 2017

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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

Jan 01, 2017 | 2006 Chevrolet Colorado

2 Answers

Low oil pressure warning


It sounds like the oil pressure sending unit is going bad. Sometime they're called oil pressure switches. That would be my first guess. Why its proportional to 1/4 segments of gas portions makes very little sense. Fuel level sending units work as semi circular resistance sweep. Not in segments the only thing that segments fuel protions are the lines on your instrument panel gauge. Anyhow check the fuel pressure switch.

Feb 23, 2013 | 2006 Ford Taurus

1 Answer

Warning light for low fuel stays on


The sensor is part of the fuel pump module inside the gas tank.
The signal is sent to the body computer, so it could be a faulty module or a problem with the body computer.
The circuit would need to be checked with a meter.

Feb 08, 2013 | Volkswagen Cars & Trucks

1 Answer

I have a Toyota Echo 2004 , the fuel tank indicator on the instrument panel stop working even if the car is completely full the ligth is on , indicating low fuel.


There is a flotation operated sender inside the gas tank, which provides information to the gauge.
Either your sender has died or become corrupted by taking on gas, or the gauge has died. Probably easier cheaper and faster to have the gauge checked out at a dealer than to pull the tank out. Might be a common problem on that model or year. Ask a dealer service department how much to figure it out.

Oct 08, 2010 | Toyota ECHO Cars & Trucks

2 Answers

I have jsut purchased a 2001 chevy silverado extended cab. I went to fill up the tank of gas and the low fuel light came on and it wont register the full tank of gas. There are only 49k miles on the truck....


it is the fuel level sender. the board will wear and cause it to lose signal; in certain spots. will need to replace the sender to fix problem. it will start registering once you burn some gas off. full is just where it drops out

Sep 27, 2010 | Chevrolet Silverado Cars & Trucks

1 Answer

Fill up on gas - the gauge goes to full. next time starting van, the gauge goes to 1/4 tank. once the DTE was still accurate and this time went to ---. what could cause this.?


I would look for a loose wire in the gauge circuit, most probably on the tank unit. The other possibility is the instrument panel voltage regulator which supplies regulated voltage the the panel gauges. Mostly these are built into the fuel gauge, so if faulty, the gauge itself will have to be replaced.

May 01, 2010 | 2005 Kia Sedona

1 Answer

Recently put a full tank of gas in 199 sl2, now the low fuel light is on and the gas gauge shows empty. what to try next


Assuming nobody stole all of your gas, the fuel level sending unit is bad, the wiring to it is bad, or the instrument panel is failing.

The wiring can be accessed inside the trunk, on the left side, by pulling the carpeting up. The sending unit should read about 35 ohms when full and 235 ohms when the tank is empty. My Haynes manual says the wires are Purple, and Black-White.

If the sending unit reads correctly then the wiring to the instrument panel, or the panel itself is malfunctioning.

If it is the sending unit: the sending unit is attached to the fuel pump inside the fuel tank. You must remove the fuel tank to replace it. While you are in their you might as well put a new fuel pump in.

Jan 05, 2010 | 1999 Saturn SL

1 Answer

Gas had moving from full to empty after i fill up


sending unit in tank may be shorting out or the wire to tank is shorting try removing plug connection and applying some electrical cleaner and plug in and remove 4 or 5 times to clean plug contacts they may be dirty worst case replace sending unit in tank.

Jul 01, 2009 | 1998 Pontiac Grand Prix

1 Answer

Gas gauge - Doodge Caravan 2000


Probably easier to replace fuel tank sender unit as constant on off condition heard or not cant be good .Potential electrical spike.

Feb 15, 2009 | 2000 Dodge Caravan

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