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

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

Error Codes

2-4 hours

Time

medium

Difficulty

medium

Severity

3 min read

536 words

Problem Statement

Learn how to diagnose and fix fuel gauge issues in Ford F-150 13th Generation (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 fuel system pressure to relieve before disconnecting fuel lines.

Symptoms

•Fuel gauge reads empty even with a full tank
•Fuel gauge fluctuates erratically while driving
•Check engine light illuminated
•Inconsistent fuel level readings after refueling
•Difficulty starting the engine

Diagnostic Steps

1
Scan the vehicle's onboard diagnostics (OBD-II) for any error codes related to the fuel system.
2
Inspect the fuel sending unit located in the fuel tank for proper operation.
3
Check the wiring and connectors leading to the fuel gauge for damage or corrosion.
4
Test the fuel gauge with a multimeter to ensure it receives the correct voltage.
5
Examine the fuel tank for any signs of damage or leaks that might affect the sending unit.
6
Verify the functionality of the instrument cluster by conducting a gauge sweep test.

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
•Socket set
•Screwdrivers
•Multimeter
•Fuel line disconnect tool

Parts Required

•Fuel sending unit (if faulty)
•Wiring connectors (if damaged)

Related Faults

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Diagnostic Steps

1
Scan the vehicle's onboard diagnostics (OBD-II) for any error codes related to the fuel system.
2
Inspect the fuel sending unit located in the fuel tank for proper operation.
3
Check the wiring and connectors leading to the fuel gauge for damage or corrosion.
4
Test the fuel gauge with a multimeter to ensure it receives the correct voltage.
5
Examine the fuel tank for any signs of damage or leaks that might affect the sending unit.
6
Verify the functionality of the instrument cluster by conducting a gauge sweep test.

Solution

1. Preparation

Gather tools and parts required.
Disconnect the negative battery terminal to prevent electrical shorts.
Ensure the vehicle is on a flat surface and the engine is off.

2. Access the Fuel Sending Unit

Tools Required: Socket set, screwdrivers, fuel line disconnect tool (if necessary).
Remove the rear seat or access panel to reach the fuel tank.
Disconnect the fuel lines and electrical connectors from the fuel pump assembly.
Carefully unbolt the fuel tank access cover to reveal the fuel sending unit.

3. Inspect the Fuel Sending Unit

Remove the fuel sending unit from the tank.
Check the float arm for free movement; it should not be stuck.
Inspect the electrical connections for corrosion or damage.
Test the resistance of the sending unit using a multimeter; it should vary smoothly as the float moves.

4. Replace or Repair Components

If the sending unit is faulty, replace it with a new unit.
Reconnect any damaged wiring or connectors as necessary.
If the gauge itself is faulty, consider replacing the instrument cluster.

5. Reassemble and Test

Reinstall the fuel sending unit and cover, securing it with bolts.
Reconnect the fuel lines and electrical connectors.
Reinstall the rear seat or access panel.
Reconnect the negative battery terminal.