Question about 1996 BMW 318

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My fuel gage does not work properly,where do i find the sensor so i can check the connection.When i start vehical it registers full then to empty

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The fuel gauge is actually fed information from the intank pump. you have two as the tank straddles over the rear dif etc. the one you need to remove is located behind the passenger seat under the rear bench. about 6 screws hold a circular plate down, and below is the pump etc. be careful as there will be a bit of fuel in the line.....but in all, about 25 mins to change. Usually the cause is a snapped wire.

Posted on May 11, 2011

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Posted on Jan 02, 2017

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My gas gauge in my 2002 Pontiac Bonnivile shows empty all the time


Fuel Gauge Troubleshooting

Fuel Gage
The IPC displays the fuel level as determined by the PCM. The IPC receives a class 2 message from the PCM indicating the fuel level percent. The fuel gage defaults to empty if:
• The PCM detects a malfunction in the fuel level sensor circuit.
• The IPC detects a loss of class 2 communications with the PCM.
When the fuel level is less than a pre-determined value, the CHECK GAGES indicator illuminates.
DTC P0462
The fuel level sensor changes resistance based on fuel level. The PCM monitors the signal circuit of the fuel level sensor in order to determine fuel level. When the fuel tank is full, the sensor resistance is high and the PCM senses a high signal voltage. When the fuel tank is empty, the sensor resistance is low and the PCM senses a low signal voltage. The PCM uses the signal circuit of the fuel level sensor in order to calculate the total remaining fuel (%) in the tank. The PCM sends the fuel level percent via the class 2 serial data circuit to the IPC in order to control the fuel gage. The fuel level information is also used for misfire and EVAP diagnostics
DTC P0463 (3.8L)

How to test fuel gauge tank sending unit P0463 GM

Mar 29, 2017 | 2002 Pontiac Bonneville

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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

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My gas gauge is stuck how do I fix it on a 1970 olds delta 88


if you disconnect the wire at the sensor or down from the sensor were you can get to it the gage should register empty and if you disconnect the ground it should register full. if nothing happens then the gage on the dash is bad, if gage moves the fuel level sensor in the tank is bad.

Aug 24, 2014 | 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

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Gas Gage is unstable. One moment it registered that the tank is completely full and then moments later it shows it is completely empty and then it jumps up to being mid level. Is there a problem with the...


the fuel level sensor is bad. I would recommend replacing the Fuel Pump Module which will be a new pump and fuel level sensor. If its been replaced already, sometimes using Chevron Fuel Injection Cleaner TECHRON will clean the contacts and MAY get it working again.

Nov 12, 2010 | 2002 Oldsmobile Silhouette

1 Answer

Fuel gage problem


The fuel guage sensor must have gone bad. It is located near the fuel pump in the fuel tank.

May 20, 2009 | 2001 Cadillac DeVille

2 Answers

Gas gauge reading empty even when tank is full


Usually if the gas gage does not work yes it is true it may be the sensor if it is electronicly controlled. the sncor will more than likley be in the tank. here is how to remove your gas tank.

  1. Before servicing the vehicle, refer to the precautions section.
  2. Relieve fuel system pressure.
  3. Drain the fuel tank.
  4. Remove or disconnect the following:
    • Negative battery cable
    • Fuel filler and vent hoses
    • Fuel tank skid plate
    • Fuel tank wiring connectors
    • Fuel supply and return lines
    • Fuel tank
    • Fuel pump assembly
      7924bg17.gif Fuel pump assembly mounting
To install:
  1. Install or connect the following:
    • Fuel pump assembly
    • Fuel tank. Tighten the bolts to 27 ft. lbs. (36 Nm).
    • Fuel supply and return lines
    • Fuel tank wiring connectors
    • Fuel tank skid plate
    • Fuel filler and vent hoses
    • Negative battery cable
  2. Start the engine and check for leaks.

Apr 16, 2009 | 2002 Isuzu Axiom

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