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I recently found myself in the situation of the yellow low gas warning light coming on but having to be at a meeting. Changed the DNA to green and when I parked it showed I had 37 miles. When I returned to the car and hour and a half later and started the car I found a plethora of fault lights, a red gauge marking and 0 miles to go. I carefully drove to the nearest gas station and fill the tank. What is surprising is it the car only took 13.7 gallons. I know it one time there was another thread regarding this but I did a search and couldn’t find it so I thought I’d report my experience
 

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The fuel gauge is not linear, it is not accurate. Mine seems to be better now than it did before an update.

Half a tank is a lot closer to 1/4 tank. At 1/4 tank you are almost out of gas and need to consider getting fuel.

The gauge drops slowly (very slow) from full to 1/2. Then it starts dropping faster. From 1/4 it drops very fast.

With a 15 gallon tank, 1/2 tank should take 7.5 gallon, but mine usually takes 10 gallons. So, that's about 2/3 used, 1/3 remaining.
 

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Below 1/4 it drops fast

I have noticed this same issue the 2 times I allowed the fuel level to drop below 1/4 rank.
 

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Here's the most important part of the linked posts:

Full/8 Bars is defaulted as 15.3 U.S. gallons or 58 liters
7 bars indicated remaining 12.3 U.S. gallons or 46.6 liters
6 bars indicated remaining 10.6 U.S. gallons or 40.1 liters
5 bars indicated remaining 8.9 U.S. gallons or 33.7 liters
4 bars indicated remaining 6.6 U.S. gallons or 25 liters
3 bars indicated remaining 4.8 U.S. gallons or 18.2 liters
2 bars indicated remaining 2.9 U.S. gallons or 11 liters
Orange gas light illuminates 1.8 U.S. gallons or 6.8 liters remaining
1 bar indicated remaining 1.4 U.S. gallons or 5.3 liters, gas gauge turns red
 

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Janky gas gauge

Probably as good a place to mention this as any (maybe I should have started a separate thread)...

On several occasions when I let the gauge go to red/empty, and the car warned me about low fuel, the gauge did not reset after I filled the tank. It stayed on empty, or went to half tank, even though I had filled it to the top. Usually the next time I fill up, the gauge starts working again.

Has anyone else seen this?
 
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Probably as good a place to mention this as any (maybe I should have started a separate thread)...

On several occasions when I let the gauge go to red/empty, and the car warned me about low fuel, the gauge did not reset after I filled the tank. It stayed on empty, or went to half tank, even though I had filled it to the top. Usually the next time I fill up, the gauge starts working again.

Has anyone else seen this?
Do you turn off the engine before refueling? Or do you fill-up with the engine running?
 

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Do you turn off the engine before refueling? Or do you fill-up with the engine running?
Oh yes, I always turn off the engine before fueling. Isn’t that the law in California?
 

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Oh yes, I always turn off the engine before fueling. Isn’t that the law in California?
Law? Yes. Safety issue? You betcha!

I was thinking that the system needs to get reset (off, on) to re-read the fuel level. In 13,000 miles, I've never experience that fuel level issue. But, I have experienced other electronic gremlins that needed a restart to fix.
 

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Do you turn off the engine before refueling? Or do you fill-up with the engine running?
You always have to turn off the engine when re-fueling. Opening the tank lid with the engine running, will cause a lack of vacuum that will translate into a a Check engine light. And then you will cry and have to go to the Dealership to reset it. Besides, it is safer to always turn off the engine. By the way, no smoking and no Cell phone near gas pumps.....:wink2:

Yves
 

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Probably as good a place to mention this as any (maybe I should have started a separate thread)...

On several occasions when I let the gauge go to red/empty, and the car warned me about low fuel, the gauge did not reset after I filled the tank. It stayed on empty, or went to half tank, even though I had filled it to the top. Usually the next time I fill up, the gauge starts working again.

Has anyone else seen this?
Hello babola,

I understand why this would be concerning. Are you planning on making your servicing dealer aware? If you need any help with this process, don't hesitate to connect with us via direct message.

Jasmine
Alfa Romeo Social Care Specialist
 
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You always have to turn off the engine when re-fueling. Opening the tank lid with the engine running, will cause a lack of vacuum that will translate into a a Check engine light. And then you will cry and have to go to the Dealership to reset it. Besides, it is safer to always turn off the engine. By the way, no smoking and no Cell phone near gas pumps.....:wink2:

Yves
Cell phones? What's wrong with cell phones?
 

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Cell phones? What's wrong with cell phones?
Rumor has it that making a call and/or answering a call can ignite gasoline fumes. I have no idea how true this really is.
 

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Rumor has it that making a call and/or answering a call can ignite gasoline fumes. I have no idea how true this really is.
I don't think it's a rumor. I've seen videos of vapor explosions with people standing right next to the filler tube using their cell phones.
 

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it's the same concern that used to have people releasing static electricity by touching something before pumping, and some people putting static straps that drag on the ground on the chassis.
it just doesn't happen, ever, except when it does.
 

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Cell phones causing fires at gas stations is apparently an old internet myth that has been around for years.
https://www.snopes.com/fact-check/fuelish-pleasures/
Well snopes has been found to not exactly be reliable in some cases. "Experts" will tell you it's a myth, until it happens.

https://www.cbsnews.com/news/phone-ignites-gas-station-fire/

Most likely it's the result of a static spark that the phone was part of. It's not the gas that ignites, it's the vapor. Anything that can cause a static spark can ignite gas vapor. Unless you have a perfectly tight seal with the pump nozzle and the gas filler tube, which is hard to do if not impossible with some pump nozzles, you're going to have gas vapor coming up out of the tube. That's what you can smell, and that's what's so volatile. If you're standing next to the nozzle holding it while pumping gas, you're in the vapor cloud area, so a cell phone could cause the vapor to ignite if it somehow generated a spark in some way.
 

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Well snopes has been found to not exactly be reliable in some cases. "Experts" will tell you it's a myth, until it happens.

https://www.cbsnews.com/news/phone-ignites-gas-station-fire/

Most likely it's the result of a static spark that the phone was part of. It's not the gas that ignites, it's the vapor. Anything that can cause a static spark can ignite gas vapor. Unless you have a perfectly tight seal with the pump nozzle and the gas filler tube, which is hard to do if not impossible with some pump nozzles, you're going to have gas vapor coming up out of the tube. That's what you can smell, and that's what's so volatile. If you're standing next to the nozzle holding it while pumping gas, you're in the vapor cloud area, so a cell phone could cause the vapor to ignite if it somehow generated a spark in some way.
But there are no spark sources within a normally functioning cell phone. The body of the phone might be able to develop a static charge by being rubbed against the "right" kind of clothing, but that is a "wardrobe malfunction" not the fault of the cell phone. Of course any kind of malfunctioning electronic device (including the cars key fob) has the potential to produce a spark.

Many states mandate vapor recovery systems in fuel filling pumps that vacuum away the vapors, preventing a fuel-air mixture that can explode from ever being achieved (also reduces smog). In Nevada I've noticed that the Wa She Shu reservation "travel center" has no such systems (the odor difference is immediately obvious) while all others do have the systems.

Anyway, grounding your self to dissipate static charge cannot hurt. I wear cotton clothes too, which exhibit minimal static buildup compared to wool or synthetics.
 
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