why does my Ford F-150 13th Generation (2015-2020) check engine light come on for no reason

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

Error Codes

1-2 hours

Time

medium

Difficulty

medium

Severity

3 min read

533 words

Problem Statement

Learn how to diagnose and fix the check engine light issue on Ford F-150 (2015-2020). Step-by-step guide with diagnostic procedures and repair instructions.

Affected Component

Engine

Estimated Time

1-2 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Disconnect the battery before working on electrical systems.
•Allow the engine to cool before inspecting components to prevent burns.

Symptoms

•Check engine light illuminated
•No noticeable performance issues
•No unusual noises or smells from the engine
•No visible leaks or fluid loss
•No warning messages on the dashboard

Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify any stored trouble codes.
2
Check the gas cap for proper sealing and ensure it is not damaged.
3
Inspect the vehicle's battery and charging system for any faults.
4
Examine the engine's wiring harness and connectors for loose or damaged connections.
5
Review the vehicle's maintenance history for recent repairs or changes that could affect the engine.
6
Clear the error codes and take the vehicle for a test drive to see if the check engine light returns.

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
•Basic hand tools (screwdriver, pliers)

Parts Required

•Replacement gas cap (if damaged)
•Replacement battery (if faulty)

Related Faults

Share this solution

Comments

No comments yet

Be the first to share your thoughts

Back to Generation

Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify any stored trouble codes.
2
Check the gas cap for proper sealing and ensure it is not damaged.
3
Inspect the vehicle's battery and charging system for any faults.
4
Examine the engine's wiring harness and connectors for loose or damaged connections.
5
Review the vehicle's maintenance history for recent repairs or changes that could affect the engine.
6
Clear the error codes and take the vehicle for a test drive to see if the check engine light returns.

Solution

1. Preparation

Gather all necessary tools and parts.
Ensure the vehicle is parked on a flat surface and the engine is cool.
Disconnect the battery to prevent any electrical shorts during inspection.

2. Scan for Error Codes

Connect the OBD-II scanner to the vehicle's diagnostic port.
Turn the ignition to the "On" position without starting the engine.
Retrieve any stored trouble codes and document them for further analysis.

3. Inspect the Gas Cap

Check the gas cap for cracks or damage.
Ensure it is tightened properly; if necessary, replace it with a new one.
Clear codes and monitor if the check engine light reappears.

4. Check Battery and Charging System

Inspect the battery terminals for corrosion and ensure they are tight.
Use a multimeter to check the battery voltage (should be around 12.6 volts when off, and 13.7-14.7 volts when running).
Replace the battery if it is weak or showing signs of failure.

5. Inspect Wiring and Connectors

Visually inspect the engine wiring harness for any signs of wear, fraying, or disconnection.
Tighten any loose connectors and clean corrosion from terminals with electrical cleaner.

6. Test Drive

Reconnect the battery and start the engine.
Take the vehicle for a test drive under various conditions (city, highway) to monitor performance.
If the check engine light remains off, the issue may have been resolved.