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wanted to get feedback from other CT owners out there, on fuel guage problems. I've had problems with known issues on CTs where the fuel guage does not register fuel levels properly after refueling. It was done under a service bulletin as a known issue to look out for. Since the replacement of a sensor unit inside the tank, it has done it one more time after about 8K miles.

so some symptoms to look for out :

1. fuel guage inside dash drops quickly and does not correspond to the miles driven and in relation to the mileage, it drops rather quickly,(so even if it shows 1/4 tank used up, you may have more fuel in the actual tank.)
2. fuel guage will not move after filling up tank, and it doesn't have to be close to empty. It would show 1/8 tank left, but after filling $20 or $25 it will remain 1/8, and only move up very very slowly.

I've taken the car back to Lexus, and they have not been very open about the issue this time...... curious.

I've seen others having issues with the accuracy of the guage but not with guage not moving after refueling. thx
 

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I had the same problem with my last car but it took 10 years before it started. Changing the file module solved the problem. Not sure if its the same source for your problem but the fix should be covered under you warranty.


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my suggestion. learn your average mileage of the car. the fuel gauge will just your reference
 

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Yesterday I drove an extra 50 miles beyond my cruising range after it reached zero and filled up with a little over 9 gallons. It's a 12 gallon tank, so there's quite a reserve there. I don't panic when it gets to zero like I did with previous cars. I do wish it were adjustable however to show zero miles when you have only 1 gallon left in the tank instead of 3.
 

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Try unplugging the negative ground about 5mins and then reconnect. Will result in a more accurate range estimate.

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I have 120 miles on my 2012 CT and the fuel gauge shows just one bar over the 1/2 mark. Range shows 300 miles. Average mpg shows 34mpg. Fuel gauge appears inaccurate. I will ask service department to take a look at the fuel gauge.
 

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Try unplugging the negative ground about 5mins and then reconnect. Will result in a more accurate range estimate.

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Is this after the full tank or what? I've noticed the same issue. At 0 miles, i've got 3 gallons in the tank. I usually drive about 100+ miles after the Empty light comes up.
 

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I think it is pretty well documented that, for whatever reason (or for no reason at all), the fuel gauges in our cars read empty when they have quite a bit of fuel in the tank. I have had several cars over the years that had goofy reading gas gauges. I never considered that a defect. It is just the way that particular car is. Good luck getting someone from Lexus to consider that a defect and fixing it. Let us know if they do, then we can all decide whether to complain, but it has not caused me much aggravation (if any).

As long as you know the foibles of your gas gauge, what is the harm?
 

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I just happen to reset the average mileage due to installing a cruise control lever.

I am getting more mileage now possibly with more use of the cruise control. 4.8L/100km When I pump at E, its about 36 litres to full tank. The Ct has a fuel capacity of 45 litres so its probably 9 litres of reserve = 3 gallons.

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Should we start a petition for Lexus (toyota) to fix this issue or atleast address it?? The MPH read is off by 2MPH as well (GPS-Verified).
 

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I just happen to reset the average mileage due to installing a cruise control lever.
I am getting more mileage now possibly with more use of the cruise control. 4.8L/100km...
I don't use cruise control, drive normally (not like a hoon) and I still average 4.6 - 4.7 L/100km.
 

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I may be way off base here, but I thought that it would be very difficult to "predict" your miles to empty in a hybrid due to the fact that you could drive for miles on the batteries alone (in the proper conditions). I'm sure that Lexus has to go with the lesser of the two (all fuel driven miles versus fuel/battery driven miles) to calculate the distance to empty, otherwise you'd be out of gas on the side of the road and complaining about that.

IMHO, this is not really an issue. I fill up at one quarter of fuel in the tank - it is much better for the fuel pump and I'm not worried about finding a gas station before I run out.
 

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Dont know whats the correct driving style but if I drove the CT like how I drove my xc90 and forester xt was getting only about 6.25L/100km

Changed my driving style to gradual slow acceleration keeping the eco needle above charging and in the eco zone.

Is real slow and sometimes getting flashed :eek: try to keep in slow lane in the company of trucks & lorries. Only way I can achieve 4.6 to 4.8 L/100km


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Dont know whats the correct driving style but if I drove the CT like how I drove my xc90 and forester xt was getting only about 6.25L/100km

Changed my driving style to gradual slow acceleration keeping the eco needle above charging and in the eco zone.

Is real slow and sometimes getting flashed :eek: try to keep in slow lane in the company of trucks & lorries. Only way I can achieve 4.6 to 4.8 L/100km


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It is easier when you have it in eco mode to accelerate a bit quicker than normal to where it is midway in the power section on the dash. Then slowly bring it back down.

Feathering the throttle when accelerating helps but it takes a bit getting used to.
 

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I'm having similar problems with this. I was just over half full on the gauge and it only took 11 litres to brim it full. That must be a fault?
Sorry for thread resurrection.
I'm new to a ct and if anyone else finds there's the same please let me know.


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From my fuelly records you can see that in the note I put on each fuel up, I list what the car reads for Trip mileage, plus avg MPG and avg speed. I used to calculate the difference from actual but I just do it manually now instead of figuring it out and writing it for each fuel up. The average seems to be 2.5 mpg difference. I usually use 3 to be safe, which means that if your car shows 45 mpg, you subtract 3 and get 42, then multiply that by 11.9 gallons and you get a total range of 499.8 or 500 miles.

The car should show empty before you reach 400 miles. I routinely see 150 miles after the range reads "---" or "0" depending on which screen you look at. Keep in mind this is with an average of 48 to 50 real MPG. It may be less if you get less MPG.

I did run out of gas once on the highway doing 60 mph because I miscalculated this, and will post separately about that as a reference in case it happens to anyone.
 
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