how to fix the check engine light on my Ford F-150 13th Generation (2015-2020)

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

Error Codes

1-3 hours

Time

medium

Difficulty

medium

Severity

3 min read

494 words

Problem Statement

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

Affected Component

Engine

Estimated Time

1-3 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

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

Symptoms

•Check engine light illuminated on the dashboard
•Rough idle or engine misfires
•Decreased fuel economy
•Unusual engine noises
•Failure to pass emissions test
•Increased exhaust emissions

Diagnostic Steps

1
Scan the vehicle's OBD-II system using a diagnostic scanner to retrieve error codes.
2
Record the specific trouble codes and research their meanings.
3
Inspect the gas cap for damage or if it is loose, as this can trigger the check engine light.
4
Check for any visible leaks in vacuum hoses or the intake system.
5
Test the battery voltage and connections to ensure the electrical system is functioning properly.
6
Inspect spark plugs and ignition coils for wear or damage.

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
•Torque wrench
•Screwdriver set

Parts Required

•O2 sensor (if applicable)
•Mass Air Flow (MAF) sensor (if applicable)
•Spark plugs
•Ignition coils
•Gas cap (if faulty)

Related Faults

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Diagnostic Steps

1
Scan the vehicle's OBD-II system using a diagnostic scanner to retrieve error codes.
2
Record the specific trouble codes and research their meanings.
3
Inspect the gas cap for damage or if it is loose, as this can trigger the check engine light.
4
Check for any visible leaks in vacuum hoses or the intake system.
5
Test the battery voltage and connections to ensure the electrical system is functioning properly.
6
Inspect spark plugs and ignition coils for wear or damage.

Solution

1. Preparation

Ensure the vehicle is parked on a flat surface and the engine is turned off.
Gather necessary tools and parts.

2. Addressing Issues from Diagnostic Codes

If codes indicate a faulty sensor (e.g., O2 sensor, MAF sensor):
1. Disconnect the battery by removing the negative terminal.
2. Remove the faulty sensor using the appropriate socket or wrench.
3. Install the new sensor, ensuring it is properly connected.
4. Reconnect the battery terminal.
If codes indicate ignition issues (e.g., spark plugs, coils):
1. Remove the engine cover if applicable.
2. Unscrew and remove the ignition coils using a socket wrench.
3. Replace spark plugs with new ones, ensuring they are gapped correctly.
4. Reinstall ignition coils and secure them.
If the gas cap is faulty:
1. Inspect the gas cap for cracks or damage.
2. Replace with a new gas cap if needed.

3. Clearing the Codes

After repairs, use the OBD-II scanner to clear the trouble codes.
Start the engine and allow it to reach operating temperature.
Turn off the engine and turn it back on to verify the check engine light does not re-illuminate.