É possível ajustar no vag-com.
2 - ADJUSTING THE DISPLAYED FUEL LEVEL
These steps are based on those given in the Bentley CD and are intended to be used after the fuel level sender has been replaced. The proper way to calibrate the fuel gauge to the new sender is to drain the fuel tank, add 7 liters (1.85 gal) of gas, which is the exact amount in the "reserve" tank, and then use adjust the fuel gauge needle so that it coincides with the red "reserve" line on the fuel gauge. I wasn't about to go through this, so I filled up my tank and adjusted the needle so that it read full (or as close as I could get it). The VAG-COM allows you to adjust the position of the needle an amount equal to 2 liters of fuel in either direction (+/-) of it's normal factory setting. To do this, do the following:
1. Select ADAPTATION (-10-) on the main screen of the Instrument Cluster control module.
2. In the CHANNEL box, enter 30 and then click on READ. This will display the stored value for the fuel gauge calibration and normally should be 128. You may enter a value from 120 to 136. Each number corresponds to a 1 ohm adjustment of the fuel level sender output and corresponds to 1/4 of a liter. You can use the UP and DOWN buttons to adjust the number while you watch the gauge needle move. If you're doing it the proper way, then adjust the needle until it lines up perfectly with the red mark on the gauge. If you're doing it a different way, like I did, then adjust the needle until it sits where you want it to.
3. Click on SAVE. The new setting is now being used.
That's about it. If you mess something up and want to go back to the original setting, it's 128.
Assim:
Ver se tá o valor 128 no módulo Instruments; canal 30. Atenção, cada incremento de 1ohm = 1/4 litro.
Cumps