A6 Quattro Wagon V6-3.2L (BKH) (2006)
Fuel Gauge Sender: Customer Interest
Instruments - Fuel Gauge Reads Empty After Fuel Fill
20 Fuel gauge reads empty after refueling (DTCs 00438, 00771)
20 10 07
2020884/6
August 11, 2010
Supersedes Technical Service Bulletin Group 20 number 10-06 dated June 23, 2010 for reasons listed below.
Affected Vehicles
CONDITION
^ After refueling, the fuel gauge reads empty.
^ One or both of the following DTCs are stored in the instrument cluster.
^
DTC 00438 (Fuel level Sensor 2 -G169- Open/Short circuit to B+ or Short circuit to Ground).
^
DTC 00771 (Sender for fuel gauge -G- Open/Short circuit to B+ or Short circuit to Ground).
TECHNICAL BACKGROUND
Due to the unattached section of cable in the area of the 2-pin plug-in connections (inside the fuel tank) between the flange of the electric fuel pump and
the fuel gauge sensors "G" or "G169", there are vibrations while driving. These vibrations cause micro movements at the pins, which lead to the
formation of fretting corrosion on the pins. As a result, there are conductivity interruptions at the pins and finally spoadic or static failure of the tank
display.
PRODUCTION SOLUTION
Two-pin plug-in connections are stabilized during production of model year 2008.