my Ford Mustang S650 (2024-Present) fuel gauge is inaccurate, what can I do?

Solution

1. Preparation

• Gather tools: OBD-II scanner, multimeter, socket set, and screwdriver.
• Ensure the vehicle is parked on a level surface and the engine is off.
• Disconnect the negative battery terminal to prevent electrical shorts.

2. Inspect Fuel Level Sensor

• Locate the fuel pump access panel in the trunk or under the rear seat.
• Remove the access panel using a screwdriver.
• Disconnect the wiring harness from the fuel pump assembly.
• Remove the fuel pump assembly from the tank by unscrewing the retaining ring with a socket set.
• Carefully lift the assembly out of the tank, taking care not to damage the float arm.

3. Test and Replace the Fuel Level Sensor

• Use a multimeter to measure the resistance of the fuel level sensor (should be within manufacturer's specification).
• If the resistance is out of range, replace the fuel level sensor.
• Install a new sensor by reversing the removal steps, ensuring the float can move freely.

4. Reassemble and Test

• Reinstall the fuel pump assembly into the tank and secure it with the retaining ring.
• Reconnect the wiring harness and replace the access panel.
• Reconnect the negative battery terminal.
• Start the vehicle and check the fuel gauge for proper operation.