Question about 2003 Saturn L-Series

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03 Saturn Gas Gauge reading wrong fuel amount

Never had gas readings until I changed the factory head unit to a new cd audio unit. After I plugged the battery back in to make sure everything was installed correctly, the gas meter shot to 3/4 when I knew for a fact it only about 1/2. Sidebar: I had to replace the Fuse for my signals since those were blown after the install somehow. Is there a fuse I can change for the fuel gauge as well to get it back to reading correctly?? Any advice will be appreciated.

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  • Saturn Master
  • 2,913 Answers

You need to check the voltage supply to the fuel gauge. If it is the same as the battery voltage the instrument voltage regulator has probably failed.

Instruments require a stable voltage that is substantially lower than battery voltage and this is provided by a small voltage regulator, usually found mounted on the printed circuit of the instrument panel.

Posted on Jun 16, 2017

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Posted on Jan 02, 2017

bigdemille
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SOURCE: Gas Gauge and Odometer Broken

yeah replace the odomitor cable that should hook into the side of the trans by the fire wall. also check the fuel tank float and fuel pump

Posted on Jun 08, 2009

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SOURCE: 2006 Saturn Relay Check Engine Light

PO455 is a large evaporative fuel leak. A bad fuel cap is ONE of the things that COULD be the problem. Fuel system cleaning only lightened your wallet. Reading your post is confusing. Did all this start AFTER the Valvoline Wallet Flushing? If so , they left something loose or disconnected. I would find a qualified repair shop to fix the problem, and if it has anything to do with what Valvoline did, make them pay the bill.

Posted on Nov 12, 2009

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SOURCE: Gas gauge reads empty when theres gas in tank,

its the sender alright and i checked 3 parts stores and no sender is offered

Posted on Mar 22, 2010

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SOURCE: 2003 saturn vue fuel gauge stopped working

can you tell me why does the gas thing does not go up when i fill up

Posted on Apr 26, 2011

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SOURCE: 2002 Saturn VUE Gas gauge reads empty with a full tank of gas. What is problem?

possible blowen fuse or a bad sending unit inside fuel tank also check the connections at the tank

Posted on Jul 27, 2012

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1 Answer

How do you fix the gas gauge? It won't read anything and it looks like it's on empty!


Courtney, Check the fuse first for the gage, if blown, replace. The gas tank will probably have to be taken out of vehicle to change the fuel sending unit. 1st Link shows how to test, other links will show replacement procedures.
"I hope this helped you out, if so let me know by pressing the helpful button. Check out some of my other posts if you need more tips and info."
Fuel Gauge Troubleshooting

How To Install Replace Fuel Pump and Sending Unit Chevy Malibu 99 03...

https://www.google.ca/url?sa=t&rct=j&q=&esrc=s&source=video&cd=3&cad=rja&uact=8&ved=0ahUKEwiY1_eWs5TLAhWE7BQKHTpRBu4QtwIIITAC&url=https%3A%2F%2Fwww.youtube.com%2Fwatch%3Fv%3DJRRG1oRQ_os&usg=AFQjCNE-G1kfXpM_P5F8YwPRC0B6RZhPmQ

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1 Answer

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year/make/model?? Does the gas gauge read empty or hard full? If it reads hard full, suspect a ground problem at tank. If gauge doesn't work at all, make sure there is power to the plug at the tank. It is also possible the float arm may have become disconnected as some of these units are tight to get back in the tank. I have also seen new pump/gauge assemblies with defective sending units resulting in non working fuel gauges.

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1 Answer

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possible blowen fuse or a bad sending unit inside fuel tank also check the connections at the tank

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1 Answer

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instrument cluster is just for monitoring. but on modern cars there can be integrated circuits to calculate the actual amount of fuel inside tank. so sender sends signals and dashboard decodes it and show the amount on gauge.

which car do you have? if it is a later model with such system you may need to reset related software to match with new sender unit on pump or floater. (dealer can do this for you)

for example if you have a new daylight driving lights(LKM) controller on new BMW's if you replace it with a new one you need to code it to match with your car. if not it wont operate correctly.,

But there is an exeption. when sockets are broken or connections are wrong, fuel and temp gauges act erratic. they jump, pulsate or dont work at all. before replacing anything more be sure that sender unit or whole asembly is the correct part for your car. second be sure that connection has been done correctly.

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1 Answer

Hi the fuel gauge on my 2003 satrun vue in not reading fuel levels correctly. what can i do to fix this problem ? please help


things r common on 03 up vehicles like urs sulfar from gas can build up on ur fuel sending unit i would try some chevron with techron fuel cleaner 20oz bottle goes in the tank if that dont improve things in 2 - 3 days ur fuel sending unit is bad , and i would try use quality gas like shell, mobile, chevron if there is one where u live cause other gas doesnt meet the requirements for vehicles

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1 Answer

Gas gauge does not read well below half tank


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.

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1 Answer

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2005 PT cruiser, i replaced the cam sensor with a aft market sensor my fuel gauge started reading wrong, and it didn't fix my problem so i replaced the cam sensor with a factory sensor it fix my running problem but the fuel gauge still reads wrong, with a full tank of gas the gauge reads 3/4 tank,

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3 Answers

HI, MY FUEL GAUGE WORKS BUD ERRATIC, I MEAN IT DOESNT SHOW THE CORRECT AMOUNT OF GAS LEFT. WHAT COULD BE WRONG? THANKS.


In a case like this, the culpret is most likely the fuel level sending unit, which is located on the fuel pump in the fuel tank. In most vehicles, the pump and the sending unit all come in one assembly, which means in order to get a correct reading on the gauge, you'll need to replace the fuel pump. And actually, considering the fact that you have to drop the fuel tank and remove the pump anyway, it's just good measure to change them as a set.

I hope this helps! :)

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Common problem on the 03-06 Envoy instrument clusters for the fuel gauge to go out. It's usually caused by one of two main problems, either the stepper motor on the cluster's circuit board is going out or the sending unit on the fuel pump is going out. Check out this blog post about the problem - Envoy fuel gauge problems

Jun 13, 2009 | 2006 GMC Envoy

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your gas gauge sensor is most likley the problem on alot of new cars they measure your fuel off an average of were your float is at. like if your not moving it stays in one spot but as you move the float moves and reads the lowest amout that it is averaging and if your float keeps reading low your going to read that you have alot less gas than you really do. have you tried filling the tank all the way and see what it does? if it stays at full until you use some gas and your float starts moving your gas gauge will probley go down in that case its the fuel sensor if this dont help let me know and ill c what i can find out for you

Aug 25, 2008 | 2006 GMC Envoy

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