how to diagnose Ford F-150 13th Generation (2015-2020) check engine light codes

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

Error Codes

1-3 hours

Time

medium

Difficulty

medium

Severity

3 min read

556 words

Problem Statement

Learn how to diagnose and fix check engine light issues in Ford F-150 13th Generation (2015-2020). Step-by-step guide with diagnostic procedures 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 systems.
•Allow the engine to cool down before opening any components.

Symptoms

•Check engine light illuminated
•Engine misfire or rough idle
•Decreased fuel efficiency
•Unusual noises from the engine
•Emissions test failure
•Loss of power during acceleration

Diagnostic Steps

1
Scan the vehicle's OBD-II system using a diagnostic scanner to retrieve trouble codes.
2
Record all stored and pending trouble codes, noting their descriptions.
3
Inspect the vehicle's gas cap to ensure it is tightly sealed and in good condition.
4
Check for any visible leaks in the vacuum hoses or intake system.
5
Inspect the ignition system components, such as spark plugs and ignition coils, for wear or damage.
6
Test the fuel system pressure to ensure it is within specifications.
7
Review the vehicle's maintenance history for any recent changes or repairs that could relate to the current issue.

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

Parts Required

•Spark plugs (if worn)
•Ignition coils (if damaged)
•Fuel filter (if clogged)
•Fuel pump (if faulty)

Related Faults

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Diagnostic Steps

1
Scan the vehicle's OBD-II system using a diagnostic scanner to retrieve trouble codes.
2
Record all stored and pending trouble codes, noting their descriptions.
3
Inspect the vehicle's gas cap to ensure it is tightly sealed and in good condition.
4
Check for any visible leaks in the vacuum hoses or intake system.
5
Inspect the ignition system components, such as spark plugs and ignition coils, for wear or damage.
6
Test the fuel system pressure to ensure it is within specifications.
7
Review the vehicle's maintenance history for any recent changes or repairs that could relate to the current issue.

Solution

1. Preparation

Gather necessary tools and parts.
Ensure the vehicle is parked on a level surface and the engine is off.
Disconnect the battery to prevent electrical shocks.

2. Retrieve and Analyze Codes

Reconnect the battery and use the OBD-II scanner to read the trouble codes.
Document the codes and use a repair manual or online database to interpret their meanings.

3. Inspect Components

If codes indicate ignition issues, remove the spark plugs:
- Use a socket wrench to loosen and remove the spark plugs.
- Inspect for wear or signs of fouling.
If codes indicate fuel system issues, check the fuel pressure:
- Attach a fuel pressure gauge to the fuel rail.
- Turn the ignition to the "on" position (do not start the engine) and check the pressure reading.

4. Repair or Replace Faulty Components

If any spark plugs or ignition coils are damaged, replace them:
- Install new spark plugs, ensuring they are gapped correctly as per manufacturer specifications.
- Reattach ignition coils and torque to manufacturer specifications.
If fuel pressure is low, inspect the fuel pump and filter:
- Replace the fuel filter if clogged.
- If the pump is faulty, follow manufacturer guidelines for replacement.

5. Clear Codes and Test Drive

Use the OBD-II scanner to clear the trouble codes from the system.
Test drive the vehicle to see if the check engine light returns and monitor performance.