why does my Ford F-150 13th Generation (2015-2020) have a check engine light and low power

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

Error Codes

2-4 hours

Time

medium

Difficulty

high

Severity

3 min read

495 words

⚠️ Safety Warning

This issue requires immediate attention. If you are not experienced with automotive repairs, consult a professional mechanic. Working on critical systems can be dangerous.

Problem Statement

Diagnose and fix check engine light and low power issues in Ford F-150 (2015-2020). Step-by-step guide with symptoms, diagnostics, and repair instructions.

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 opening any components.

Symptoms

•Check engine light illuminated
•Loss of engine power during acceleration
•Rough idle or stalling
•Decreased fuel efficiency
•Unusual engine noises (e.g., knocking or pinging)
•Increased exhaust emissions

Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify specific fault codes.
2
Check the condition of the air filter and ensure it is not clogged.
3
Inspect the fuel system for proper pressure and leaks, including the fuel pump and injectors.
4
Examine the ignition system components such as spark plugs and ignition coils for wear or damage.
5
Inspect for vacuum leaks in hoses or intake manifold gaskets.
6
Check the throttle body for carbon buildup or malfunctions.

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
•Fuel pressure gauge
•Socket set
•Multimeter
•Throttle body cleaner

Parts Required

•Fuel pump (if needed)
•Spark plugs
•Ignition coils (if needed)

Related Faults

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Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify specific fault codes.
2
Check the condition of the air filter and ensure it is not clogged.
3
Inspect the fuel system for proper pressure and leaks, including the fuel pump and injectors.
4
Examine the ignition system components such as spark plugs and ignition coils for wear or damage.
5
Inspect for vacuum leaks in hoses or intake manifold gaskets.
6
Check the throttle body for carbon buildup or malfunctions.

Solution

1. Preparation

Gather tools and parts.
Disconnect the battery negative terminal to prevent electrical shorts.
Ensure the vehicle is parked on a level surface and the engine is cool.

2. Address Fault Codes

Reconnect the OBD-II scanner and note any stored fault codes.
Clear the codes and perform a test drive to confirm whether the issue returns.

3. Fuel System Inspection

Remove the fuel pump relay and use a fuel pressure gauge to check fuel pressure.
- Expected pressure range: 50-70 psi (check service manual for specifics).
If pressure is low, replace the fuel pump.
Inspect fuel injectors for clogs; clean or replace as necessary.

4. Ignition System Service

Remove spark plugs and inspect for wear; replace if needed.
Test ignition coils with a multimeter; replace any faulty coils.

5. Throttle Body Cleaning

Remove the throttle body from the intake manifold.
Clean the throttle body using throttle body cleaner.
Inspect the throttle position sensor; replace if malfunctioning.

6. Reassembly and Testing

Reinstall all components in reverse order of removal.
Reconnect the battery terminal.
Start the engine and monitor for any warning lights.