my Toyota Highlander Third Generation (2014-2019) fuel gauge is inaccurate, what's wrong

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the vehicle battery to ensure safety while working on electrical components.

2. Access the Fuel Sender Unit

• Sub-steps:
  1. Remove the rear seat or access panel to locate the fuel sender unit.
  2. Disconnect any electrical connectors and fuel lines carefully.
  3. Remove the retaining ring securing the fuel sender unit using a suitable tool.
  4. Lift the fuel sender unit out of the tank while being cautious of fuel spillage.

3. Inspect and Replace Components

• Sub-steps:
  1. Inspect the float arm and the resistor for any signs of wear or damage.
  2. If the float or resistor is damaged, replace the fuel sender unit with a new part.
  3. Ensure that all connections are clean and tight before reassembling.
  4. If the wiring is damaged, repair or replace the affected wiring.

4. Reassemble and Test

• Sub-steps:
  1. Reinsert the fuel sender unit into the tank and secure it with the retaining ring.
  2. Reconnect the fuel lines and electrical connectors.
  3. Reinstall the rear seat or access panel.
  4. Reconnect the battery.