why does my Skoda Octavia's fuel gauge fluctuate while driving?

Solution

1. Preparation

• Gather tools: OBD-II scanner, multimeter, socket set, and cleaning supplies.
• Park the vehicle on a level surface and turn off the engine.
• Disconnect the battery to ensure safety while working on electrical components.

2. Inspect Fuel Tank

• Remove the fuel tank access cover if applicable.
• Check for any visible leaks or cracks in the fuel tank.
• Clean the area around the fuel tank to prevent contamination.

3. Test Fuel Level Sensor

• Locate the fuel level sensor, typically found in the fuel tank.
• Disconnect the sensor's electrical connector.
• Use a multimeter to test the resistance of the sensor while moving the float arm (if applicable). Resistance should change smoothly.
• Replace the sensor if it does not show a gradual change in resistance.

4. Repair Wiring and Connections

• Inspect the wiring harness for fraying or damage.
• Clean and secure any loose connections at the fuel level sensor and instrument cluster.
• Repair or replace damaged wires as needed.

5. Reassemble and Test

• Reconnect the battery.
• Reassemble any components that were removed during inspection.
• Start the vehicle and observe the fuel gauge in various driving conditions to ensure it functions correctly.