why is my Toyota Highlander Third Generation (2014-2019) fuel gauge inaccurate

Solution

1. Preparation

• Gather necessary tools and parts.
• Ensure the vehicle is parked on a flat surface and the engine is off.
• Disconnect the battery to prevent electrical shorts.

2. Accessing the Fuel Sender Unit

• Remove the rear seats or access panel in the trunk to reach the fuel tank access point.
• Disconnect any electrical connectors and hoses attached to the access panel.
• Remove the access panel using a socket set.

3. Inspect and Test the Fuel Sender

• Carefully remove the fuel sender unit from the tank.
• Inspect the float mechanism for damage or obstruction.
• Use a multimeter to check the resistance of the sender unit at various fuel levels; compare readings to manufacturer specifications.

4. Repair or Replace Components

• If the sender unit is faulty, replace it with a new unit according to manufacturer specifications.
• Reconnect all electrical connectors and hoses securely.
• If wiring is damaged, repair or replace it as necessary.

5. Reassembly

• Reinstall the access panel and secure it with screws.
• Reconnect the battery.
• Perform a visual inspection to ensure all components are properly seated and secured.