B103EFuel level sensor 1: resistance too high

• Volkswagen group code · Instrument cluster

How the car detects it

The instrument cluster reads too high a resistance from the fuel level sender in the tank, as from an open circuit, so the gauge can drop to empty. Volkswagen lists it on 2017 Jetta, Passat and Golf SportWagen with a fuel gauge falling to empty.

What you may notice

• Fuel gauge drops to empty
• Check-engine light possible (fuel level code in the engine computer)

Likely causes

• PossibleFuel level sender in the tank
• PossibleWiring or connector at the fuel pump flange

Sources

• static.nhtsa.gov › MC-10165029-0001.pdf · official document
• static.nhtsa.gov › MC-10127873-9999.pdf · official document
• static.nhtsa.gov › MC-10150884-9999.pdf · official document

Backed by an official manufacturer document.

From Obdaryn's Volkswagen group pack, exactly as the app shows it, with the public sources above. Guidance only; confirm with a workshop.