Greetings!

I drive a 2012 XC60 T6 AWD R-Design with a reasonable mileage of 60k+. Usually, I put a US Regular gas in it, although Polestar suggests using Premium for "better performance".

Recently, I noticed what seems to be a fuel gauge malfunction.
Basically, I entered a gas pump with about 1/2 a tank and fueled the car up to max, paid something that made sense for half a tank.
Right after I got into the car, I saw that the amount of fuel in the tank is shown as unchanged. After driving for a couple of hours, I watched the fuel lever "progress bar" reach 100%, and then gradually decrease under consumption.

During further "fueling-ups" it feels like sensor is working correctly, but I still keep track of miles traveled as a secondary source of truth.

I requested a quote from a repair shop, and got scared away by a whoping $1.5k for the entire fuel pump replacement.
My question is if it's possible to diagnose myself which part of the system is faulty, and how can repair cost be reduced.

Thanks!

 

Did you ever find the answer to your fuel gauge reading issue? I'm having that problem too.

 

Nope. But it sort of went away with time, and didn't come back. I ended up getting a habit of using the trip A/B computer to double check what I'm reading on the fuel gauge.

 

My fuel gauge does it intermittently but this last time was the longest, especially after I just filled my gas tank. I'm going to start looking at my trip mileage now after each fill-up. Thank you for your answer.

 

I don’t know if it matters, but I gas up at Costco exclusively, premium gas (yes, I hate money).
Also, asked ChatGPT about it and it suggested to replace fuel level sending unit, as one of the options.
In any case, good luck!