MY FUEL GAUGE SHOWS ERRATIC READINGS AND CAUSES THE "KM'S TO GO" SETTING TO SOMETIMES TELL ME I'M OUT OF FUEL WHEN I HAVE HALF A TANK LEFT OR 400KMS TO GO WHEN I HAVE 1 LITRE OF FUEL LEFT, I'M TOLD IT'S THE SOFTWARE BUT THE UPGRADE SEEMS TO HAVE FAILED, WHERE TO FROM HERE ?
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if you read the owners manual it will tell you that the unit will not reset properly with only fuel added
that means to get it to read right again you have to fill the tank completely
My friend on your attempt to renew the fuel pump which actually is connected with the fuel gauge you either damage the leveling gauge either by bending it or scratched it to a place where the gauge shows half tank. It is better to remove again and very slowly and carefully check for any slight faults.
Good Luck.
{: ) Your fuel level sensor could be intermittently reading high resistance and may need replacement. An intermittent reading can happen at any level (say 1/4, 1/2, 3/4) and will suddenly give you an empty reading and fuel light, sometimes an SES light may follow. At any rate, this kind of symptoms still recommends replacement of the fuel level sensor.
You can observe it by yourself. Does it read normal on lets say half full but will read empty when you can calculate that you still have 1/4 remaining on your tank. In your case you've just filled it full, and it's no different once the fuel level sensor start getting erratic readings.
Although it may take time, you can wait until the fuel level stabilizes to a certain lower level where you think your gauge was reading normally before. You can also do some stop and go, forward and reverse, to slosh the level arm to a a more readable position. Check if you can get clearer results out of this trick.
A scan tool is a better tool to determine quickly the condition of the sensor and may tell also if there are other codes that is related to your problem.
More than likely a floater issue!! This is located within the gas tank and mounted to the fuel pump. It sends a unique signal depending on the amount of fuel within the tank determining fuel gauge readings. Its very possible the unit is defective causing improper gauge readings.
The fuel gauge pickup assembly is mounted on the outside of the fuel pump which is inside the gas tank. It is a big job to service or change and it should only be undertaken by a person who understands the entire fuel system and electrical system. (Expensive as well)
It could be a bad fuel gauge in the dash unit, but....
Usually it's "The bad".
The fuel level sending wipe arm and windings on the fuel sender wear and send erratic readings.The only cure is a replacement fuel gauge sender.
The check engine light should not be related to the erratic fuel readings.
"The good".
If you have over 200,000kms or 120,000 miles on your van you need a new fuel pump anyway,so have a complete assembly put in which will have a new fuel sender on it.
HI, the oil pressure sending unit may be malfunctioning at this point. this will cause erratic readings. if your oil level is proper and there are no apparent oil leaks, you will need to replace the oil pressure sending unit. this will fix the erratic oil pressure readings.
Concerning the gas gauge. this device also has a sending unit that sends the correct fuel level reading to the gas gaugevia wire transfer. this sending unit is located and attached to the fuel pump assembly inside the gas tank. replacing this device will fix this issue as well.
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