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

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

Error Codes

2-4 hours

Time

medium

Difficulty

medium

Severity

3 min read

597 words

Problem Statement

Learn how to diagnose and fix a non-functioning fuel gauge in a 2015-2020 Ford F-150. 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.
•Relieve fuel system pressure before disconnecting fuel lines.

Symptoms

•Fuel gauge reading remains empty or fluctuates erratically
•"Check Gauge" warning light may illuminate on the dashboard
•Inconsistent fuel level readings after refueling
•Possible fuel-related warning messages on the dashboard
•Engine may stall due to running out of fuel unexpectedly

Diagnostic Steps

1
Scan the vehicle's OBD-II system for any error codes related to the fuel system or gauge malfunction.
2
Inspect the fuel gauge fuse in the fuse box for any signs of failure or damage.
3
Check the wiring and connectors at the fuel sender unit for corrosion or loose connections.
4
Measure the resistance of the fuel sender unit using a multimeter to determine if it is functioning correctly.
5
Inspect the fuel tank and sender unit for physical damage or leaks.
6
Confirm the proper operation of the instrument cluster by performing a cluster self-test if available.

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
•Fuse puller or needle-nose pliers
•Electrical cleaner
•Fuel line disconnect tool

Parts Required

•Fuel sender unit (if faulty)
•Replacement fuse (if blown)

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Diagnostic Steps

1
Scan the vehicle's OBD-II system for any error codes related to the fuel system or gauge malfunction.
2
Inspect the fuel gauge fuse in the fuse box for any signs of failure or damage.
3
Check the wiring and connectors at the fuel sender unit for corrosion or loose connections.
4
Measure the resistance of the fuel sender unit using a multimeter to determine if it is functioning correctly.
5
Inspect the fuel tank and sender unit for physical damage or leaks.
6
Confirm the proper operation of the instrument cluster by performing a cluster self-test if available.

Solution

1. Preparation

Gather required tools and parts.
Disconnect the vehicle battery to ensure safety while working on electrical components.

2. Inspect and Replace Fuse

Tools Required: Fuse puller or needle-nose pliers
Locate the fuse box under the dashboard or hood.
Identify the fuel gauge fuse using the diagram on the fuse box cover.
Remove the fuse and visually inspect it for any signs of being blown.
Replace with a new fuse of the same amperage if necessary.

3. Check and Repair Wiring

Tools Required: Multimeter, electrical cleaner, and electrical tape
Trace the wiring from the fuel sender unit to the instrument cluster.
Use a multimeter to check for continuity and resistance along the wires.
Clean any corroded connections with electrical cleaner and secure loose wires with electrical tape.

4. Inspect and Replace Fuel Sender Unit

Tools Required: Socket set, fuel line disconnect tool, and safety goggles
Safely relieve fuel system pressure by removing the fuel pump relay and starting the engine until it stalls.
Disconnect the fuel lines and electrical connector from the fuel sender unit.
Remove the fuel sender unit from the fuel tank.
Inspect for physical damage; replace the unit if necessary.
Reinstall the new fuel sender unit, reconnect fuel lines and electrical connectors.

5. Reassemble and Test

Reconnect the battery.
Start the vehicle and check if the fuel gauge functions correctly.
Monitor for consistent readings and ensure no warning lights are illuminated.