how to fix the fuel gauge not working on my Ford F-150 13th Generation (2015-2020)

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

Error Codes

2-4 hours

Time

medium

Difficulty

medium

Severity

3 min read

595 words

Problem Statement

Learn how to diagnose and fix the fuel gauge issue on your Ford F-150 (2015-2020). Step-by-step guide with symptoms, diagnostic steps, 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 tank to cool before working on it to prevent fire hazards.

Symptoms

•Fuel gauge needle remains at 'E' (empty) regardless of fuel level
•Erratic fuel gauge readings (jumps or fluctuates)
•Check engine light illuminated
•Fuel warning light does not activate when low on fuel
•Inaccurate distance-to-empty calculation on the dashboard

Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to check for any related fault codes.
2
Inspect the vehicle's battery and electrical connections for corrosion or loose wires that may affect the fuel gauge.
3
Check the fuel sending unit resistance using a multimeter to determine if it is functioning correctly.
4
Inspect the wiring harness and connectors for damage or corrosion leading to the fuel gauge.
5
Verify the operation of the fuel gauge on the dashboard through a manual gauge test if available.
6
Check the fuel pump operation, as a faulty fuel pump can affect the sending unit’s readings.

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
•Fuel line disconnect tool
•Torque wrench

Parts Required

•Fuel sending unit
•Fuel line O-rings (if applicable)
•Electrical connectors (if damaged)

Related Faults

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Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to check for any related fault codes.
2
Inspect the vehicle's battery and electrical connections for corrosion or loose wires that may affect the fuel gauge.
3
Check the fuel sending unit resistance using a multimeter to determine if it is functioning correctly.
4
Inspect the wiring harness and connectors for damage or corrosion leading to the fuel gauge.
5
Verify the operation of the fuel gauge on the dashboard through a manual gauge test if available.
6
Check the fuel pump operation, as a faulty fuel pump can affect the sending unit’s readings.

Solution

1. Preparation

Gather tools and parts needed for the repair.
Disconnect the vehicle's battery to ensure safety while working on electrical components.

2. Access the Fuel Sending Unit

Remove the rear seat or access panel: Depending on the configuration, remove the rear seat or access panel to reach the fuel tank.
Disconnect electrical connectors: Carefully unplug any electrical connectors leading to the fuel sending unit.
Remove the fuel tank: If necessary, support the tank with a jack, remove the straps, and lower it to access the sending unit.

3. Inspect and Replace the Fuel Sending Unit

Check for damage: Inspect the fuel sending unit for any signs of damage, rust, or wear.
Test the sending unit: Use a multimeter to check the resistance of the sending unit while moving the float arm. It should vary smoothly; if not, consider replacing it.
Replace with a new sending unit: If defective, remove the old sending unit by unscrewing it and lifting it out, then install the new sending unit in reverse order.

4. Reassemble and Reconnect

Reinstall the fuel tank: Carefully lift the fuel tank back into position, securing it with straps.
Reconnect electrical connectors: Ensure all connectors are securely attached to the sending unit and other components.
Reinstall the rear seat or access panel: Restore the interior components to their original position.

5. Battery Reconnection and Testing

Reconnect the battery: Once everything is reassembled, reconnect the battery.
Start the vehicle: Turn on the ignition and check if the fuel gauge is now functioning correctly.