peterjana

Thank you for your reply bigjohn. I found the problem in the end. There are actually two sender units, one for each side of the fuel tank. I only found this mentioned very briefly in the workshop manual after a lot of searching on erwin. When I looked under the left back seat, I found a not quite finished mouse nest on the fuel tank cover with the wires to the sender unit neatly bitten off flush with the plug. Once I soldered it back together - hey presto normal fuel gauge again! It appears that the gauge adds up the readings from the two sides, so if one is not working you get about half the fuel level reported. Even though it's front wheel drive, there is still a transmission tunnel and the fuel tank is kind of draped over it and therefore has a vacuum pump and sender unit on the left hand side as well as the normal fuel pump and sender on the right.

Hi Everyone, I have a 2012 Superb II 2.0 TDI 170 Estate. Recently the fuel gauge has started under-reporting the amount of fuel in the tank. With a full tank the needle shows half full, with half a tank, the needle shows a quarter and so on. The remaining range is also reduced accordingly. Everything else seems to be normal. I tried replacing the sender unit, which has not worked. The new sender is a genuine part from my local Skoda dealer and looks exactly the same as the old one. In testing the new sender I tried holding the float up to mimic a full tank, and sure enough the fuel gauge reports half full. I would be very grateful for any suggestions.