why is my Ford F-150 13th Generation (2015-2020) fuel gauge not accurate

Ford F-150 13th Generation (2015-2020)

Error Codes

2-4 hours

Time

medium

Difficulty

medium

Severity

3 min read

542 words

Problem Statement

Learn how to diagnose and fix inaccurate fuel gauge issues in Ford F-150 (2015-2020). Step-by-step guide with diagnostic procedures and repair instructions.

Affected Component

Fuel System

Estimated Time

2-4 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Disconnect battery before working on electrical systems.
•Allow the fuel system to depressurize before removing the fuel pump assembly.

Symptoms

•Fuel gauge displays empty while tank is full
•Fuel gauge fluctuates erratically while driving
•Check engine light illuminated
•Inability to start due to perceived low fuel
•Warning messages related to fuel system on the dashboard

Diagnostic Steps

1
Scan the vehicle's onboard computer for any Diagnostic Trouble Codes (DTCs) using an OBD-II scanner.
2
Inspect the fuel level sensor and wiring for damage or disconnections in the fuel tank.
3
Check the fuel gauge for proper function by performing a self-test (if available) or testing it directly.
4
Verify the fuel tank ground connection to ensure proper electrical grounding.
5
Measure the voltage at the fuel level sensor while the ignition is on to confirm it is receiving power.
6
Check for any blown fuses related to the fuel gauge circuit.

Solution

💡 Expert Tip

For complex repairs like this, consider taking photos at each step. This helps if you need to reverse a step or consult with a mechanic. Also, keep all removed parts organized - you may need to reference them during reassembly.

Verification

After completing the repair, verify that the issue has been resolved:

✓Test the affected component to ensure it functions correctly
✓Check for any error codes or warning lights
✓Monitor the vehicle for a few days to ensure the issue does not recur

Prevention Tips

To prevent this issue from occurring again:

•Follow the manufacturer's recommended maintenance schedule
•Address warning signs early before they develop into major issues
•Use quality parts and fluids recommended for your vehicle
•Keep detailed records of all repairs and maintenance

Tools & Equipment Required

•OBD-II scanner
•Multimeter
•Socket set
•Screwdrivers
•Safety glasses
•Gloves

Parts Required

•Fuel level sensor (if faulty)
•Replacement O-rings or gaskets (if needed)

Related Faults

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Diagnostic Steps

1
Scan the vehicle's onboard computer for any Diagnostic Trouble Codes (DTCs) using an OBD-II scanner.
2
Inspect the fuel level sensor and wiring for damage or disconnections in the fuel tank.
3
Check the fuel gauge for proper function by performing a self-test (if available) or testing it directly.
4
Verify the fuel tank ground connection to ensure proper electrical grounding.
5
Measure the voltage at the fuel level sensor while the ignition is on to confirm it is receiving power.
6
Check for any blown fuses related to the fuel gauge circuit.

Solution

1. Preparation

Gather necessary tools and parts.
Ensure the vehicle is parked on a level surface and the engine is off.
Disconnect the battery for safety.

2. Accessing the Fuel Level Sensor

Tools Required: Socket set, screwdrivers, safety glasses, gloves.
Remove the rear seat or access panel to reach the fuel pump assembly (depending on configuration).
Disconnect any electrical connectors and hoses attached to the fuel pump assembly.

3. Inspecting the Fuel Level Sensor

Remove the retaining ring or bolts securing the fuel pump assembly using the appropriate socket.
Carefully lift the fuel pump assembly out of the tank.
Inspect the fuel level sensor for any visible damage or corrosion.
Use a multimeter to check the resistance of the sensor; it should vary with the level of fuel in the tank.

4. Repair or Replace

If the sensor is faulty, replace it with a new one. Ensure it is compatible with the 2015-2020 Ford F-150.
Reinstall the fuel pump assembly, ensuring all seals and gaskets are properly seated to avoid leaks.
Reconnect all electrical connectors and hoses firmly.

5. Reassembly

Replace the retaining ring or bolts and torque them to the manufacturer's specifications (typically around 15-20 lb-ft).
Reinstall the rear seat or access panel.
Reconnect the vehicle's battery.