Volkswagen Golf MK7 (2015-2019) fuel gauge not reading correctly, how to fix?

Solution

1. Preparation

• Gather all necessary tools and parts.
• Disconnect the vehicle battery to ensure safety while working on electrical components.
• Tools Required: OBD-II scanner, multimeter, socket set, screwdrivers, safety gloves.

2. Remove Fuel Level Sending Unit

• Locate the fuel pump access panel (often found in the trunk under a cover).
• Remove the access panel by unscrewing or unclipping it.
• Disconnect the electrical connector from the fuel level sending unit.
• Remove the retaining ring using a specialized tool or a screwdriver, turning it counterclockwise.
• Carefully lift out the fuel level sending unit from the tank.

3. Inspect and Test the Sending Unit

• Visually inspect the sending unit for any physical damage or corrosion.
• Use a multimeter to measure the resistance across the sending unit terminals while moving the float arm. Resistance values should change smoothly.
• If resistance is not consistent (typically between 0-90 ohms), the sending unit may be faulty and require replacement.

4. Replace Sending Unit (if necessary)

• If the sending unit is faulty, install a new unit by reversing the removal steps.
• Ensure the new unit is properly seated in the tank and secure it with the retaining ring.
• Reconnect the electrical connector firmly.

5. Reassemble and Test

• Reattach the access panel in the trunk.
• Reconnect the vehicle battery.
• Start the vehicle and check if the fuel gauge reads correctly.