why does my Ford F-150 13th Generation (2015-2020) check engine light keep coming on

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

Error Codes

2-4 hours

Time

medium

Difficulty

medium

Severity

3 min read

528 words

Problem Statement

Learn how to diagnose and fix the recurring check engine light on your Ford F-150 13th Generation (2015-2020). Step-by-step guide with diagnostic procedures.

Affected Component

Engine

Estimated Time

2-4 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Disconnect the battery before working on electrical systems.
•Allow the engine to cool before inspecting any components related to the exhaust system.

Symptoms

•Check engine light illuminated
•Rough idle or engine misfire
•Decreased fuel efficiency
•Poor acceleration or power loss
•Unusual engine noises
•Possible emission system failure

Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify any stored trouble codes.
2
Inspect the gas cap to ensure it is tight and not damaged, as a loose cap can trigger the check engine light.
3
Check for any visible vacuum leaks in hoses and intake manifold.
4
Examine the ignition system components, including spark plugs and ignition coils, for wear or damage.
5
Test fuel pressure to ensure the fuel system is functioning correctly.
6
Inspect the exhaust system for leaks or blockages, particularly in the catalytic converter.

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
•Fuel pressure gauge
•Torque wrench
•Vacuum gauge

Parts Required

•Spark plugs
•Ignition coils (if necessary)
•Fuel filter
•Vacuum hoses (if damaged)
•Catalytic converter (if necessary)

Related Faults

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Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify any stored trouble codes.
2
Inspect the gas cap to ensure it is tight and not damaged, as a loose cap can trigger the check engine light.
3
Check for any visible vacuum leaks in hoses and intake manifold.
4
Examine the ignition system components, including spark plugs and ignition coils, for wear or damage.
5
Test fuel pressure to ensure the fuel system is functioning correctly.
6
Inspect the exhaust system for leaks or blockages, particularly in the catalytic converter.

Solution

1. Preparation

Gather tools and parts required for the repair.
Disconnect the battery negative terminal to ensure safety while working on electrical components.

2. Address Fault Codes

Use the OBD-II scanner to clear the error codes after repairs to reset the check engine light.
If reoccurring codes are present, further inspection of the specific system related to the code is necessary.

3. Inspect and Replace Faulty Components

Ignition System:
- Remove the spark plugs using a socket wrench and inspect for wear.
- Replace any worn spark plugs with OEM parts, ensuring proper gap settings.
- Check ignition coils; replace if faulty.
Fuel System:
- Connect a fuel pressure gauge to the fuel rail and check for proper pressure (refer to manufacturer specifications).
- Replace the fuel filter if clogged or if the fuel pressure is inadequate.

4. Check and Repair Vacuum Leaks

Inspect all vacuum hoses for cracks or disconnections.
Replace any damaged hoses and ensure all connections are secure.

5. Exhaust System Inspection

Visually inspect the exhaust system for leaks.
If a catalytic converter issue is suspected, perform a backpressure test and replace it if necessary.