Greetings,
so i have searched through the net about my problem and seems i cant find it. Just bought the car and everything was going perfectly find.
But just today the battery was weak and i jump start it.
The problem starts with the fuel gauge goes on empty but i just filled it half yesterday. So i tried looking at the wirings and it worked well again.
The funny thing is,when i closed the rear left door, the gauge starts to go down back again...when i opened it, it goes back up! So i tried looking for answers,maybe short wirings or loose ends or even unscrewed grounds,but nothing. Hoping someone would answer my question so i can try repair it myself before sending it to toyota.
thanks in advance!

 

Did the problem started after the jump start?

Any other strange electrical problems?

Might be a low voltage problem. How is the alternator voltage output?

There are two wires going to the tank sensor which may be colored gray and pink. Both wires go to a computer inside the gauge panel. Pink wire goes to ground. Check if pink wire has a good ground.