Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSAUDI2012A4 2.0T AVANT QUATTROREPAIR AND DIAGNOSISENGINE PERFORMANCEFUEL DELIVERY2.0L - FUEL SUPPLY SYSTEM - ENGINE CODE(S): CAEB (AVANT)20 FUEL SUPPLY SYSTEMDESCRIPTION AND OPERATIONFUEL DELIVERY UNIT AND FUEL LEVEL SENSOR OVERVIEW
2012 Audi A4 2.0T Avant Quattro
Fuel Delivery Unit And Fuel Level Sensor Overview
2012 Audi A4 2.0T Avant QuattroSECTION Fuel Delivery Unit And Fuel Level Sensor Overview
- Fuel Delivery Unit
- Electric fuel pump, checking, refer to ELECTRIC FUEL PUMP, CHECKING
- Removing and installing, refer to FUEL DELIVERY UNIT
- Fill the fuel tank with at least 5 liters of fuel after installing
- Holding pressure, checking, refer to Diagnosis and Testing
- Threaded Ring
- Seal
- Replace
- Install dry
- Union Nut
- 120 Nm
- Replace
- Use fuel tank sender unit tool T40068A for loosening and tightening
- Fuel Line
- To the engine
- Do not kink
- To remove from locking flange, press release button
- Clipped to the fuel tank
- Connector
- For the transfer fuel pump -G6- and fuel level sensor -G-
- Connector
- For the Fuel Pump (FP) control module -J538-
- Spring Nut
- Fuel Pump (FP) Control Module -J538-
- Removing and installing, refer to Fuel Pump Control Module -J538-
- Bolt
- 2.5 Nm
- Connector
- For fuel level sensor 2 -G169-
- Vent Line
- To the EVAP canister
- Do not kink
- To remove from locking flange, press release button
- Clipped to the fuel tank
- Union Nut
- 120 Nm
- Replace
- Use fuel tank sender unit tool T40068A for loosening and tightening
- Seal
- Replace
- Install dry
- Threaded Ring
- Locking Flange
- With the fuel level sensor 2 -G169-
- Vent Line
- To remove from locking flange, press release button
- Clipped to the fuel tank
- Vent Line
- To remove from locking flange, press release button
- Clipped to the fuel tank
- Fuel Level Sensor 2 -G169-
- Check the resistance values. Refer to Fuel Level Sensor 2 -G169-, CHECKING
- Removing and installing, refer to Fuel Level Sensor 2 -G169-
- Fill the fuel tank with at least 5 liters of fuel after installing
- Suction Line
- Removing and installing, refer to SUCTION LINE
- Fill the fuel tank with at least 5 liters of fuel after installing
- Connector
- For fuel level sensor 2 -G169-
- Fuel Level Sensor -G-
- Check the resistance values. Refer to Fuel Level Sensor -G-, CHECKING
- Removing and installing, refer to Fuel Level Sensor -G-
-- Tighten bolts -arrows- to 1.5 Nm.
RENDER: 1.0x
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.