Testing signal from fuel gauge sender -G — AUDI
Testing signal from fuel gauge sender -G on Audi: factory workshop procedure. Full factory text, tools and checks.
Workshop procedure for AUDI — the factory write-up, straight from real workshop data.
📋 Procedure
If there is a fault concerning the fuel gauge on the dash panel insert, check whether the signal is present at the dash panel insert.
Connect vehicle diagnostic, testing and information system VAS 5051.
=> Electrical system, Self-diagnosis 02.99 ä; Repair group 01; Connection vehicle diagnostic, testing and information system VAS 5051
Electrical system, Self-diagnosis 02.99 ä
Connection vehicle diagnostic, testing and information system VAS 5051
Select "Reading measured value block" (data block).
Select Display Group 002.
If the fuel level is displayed on VAS 5051 but not on the fuel gauge, the dash panel insert is defective and should be replaced.
If the fuel level is not displayed on VAS 5051 as well, test the signal at the multi-pin connector on the dash panel insert.
Remove dash panel insert => Page
90-2
.
Connect test box V.A.G 1598 to the blue 32-pin connector using adapter V.A.G 1598/25.
Use multimeter V.A.G 1526 to measure the resistance between contacts 4 and 5 (sensor earth).
Specifications:
Fuel tank 80 ltr. · Fuel tank 90 ltr.
Scale division · Resistance / ω · Contents / / Litres · Resistance / / ω · Contents / / Litres
Empty · 166 ± 7 · 0 · 166 ± 7 · 0
Res. 1 1) · 154 ± 7 · 12 · 154 ± 7 · 12
1/4 · 136 ± 7 · 20 · 131 ± 7 · 22
1/2 · 94 ± 6 · 39 · 88 ± 6 · 42
1/1 2) · 21 ± 4 · 79 · 12 ± 4 · 87
1/1 3) · 19 ± 4 · 84 · 9 ± 4 · 92
1)
First division of the fuel reserve zone
2)
Needle is right on the highest scale division
3)
Needle is above the highest scale division
If the readings do not match the specifications, check wiring between dash panel insert and fuel gauge sender -G (front-wheel drive/quattro) or -G169 (quattro) according to current flow diagram.
=> Current flow diagrams, Electrical fault finding and Fitting locations
If there are no open circuits or short circuits, check fuel gauge sender -G (front-wheel drive/quattro) or -G169 (quattro).
Checking fuel gauge sender.
=> Fuel supply system - Petrol engines; Repair group 20; Fuel supply system - front-wheel drive/Fuel supply system four-wheel drive; Checking fuel gauge sender
Fuel supply system - Petrol engines
Fuel supply system - front-wheel drive/Fuel supply system four-wheel drive
Checking fuel gauge sender
If the readings match the specifications, the fault is in the dash panel insert; replace the dash panel insert =>Page
90-2
.
TorqFix answers live for your specific car — tell it the engine code and it serves the matching sequence, torque figures and wiring for that exact variant.
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Who makes these pages, and how
TorqFix was built by a mechanic — after a 2,700 km drive with five roadside repairs that no diagnostic tool could explain.
The figures on this page come from manufacturer workshop documentation and are shown as they are. The page is assembled automatically from that data — it is not written by an AI. The AI works in the chat, where it answers for your specific car. It writes nothing here.
Variants of the same model differ. Cross-check torque against the factory manual for your engine before final tightening.
Seen a figure that does not match your manual? Write to us — we correct it and note when. support@torqfix.com
The story behind TorqFix →Workshop data on this page last updated 20 Sep 2026.