how to fix the check engine light that keeps coming on in my Ford Explorer Fifth Generation (2011-20...

Ford Explorer Fifth Generation (2011-2019)

Error Codes

2-4 hours

Time

medium

Difficulty

medium

Severity

3 min read

553 words

Problem Statement

Learn how to diagnose and fix the check engine light issue in Ford Explorer (2011-2019). Step-by-step guide with diagnostic procedures and repair instructions.

Affected Component

Engine

Estimated Time

2-4 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Disconnect battery before working on electrical systems.
•Allow engine to cool before opening any components.

Symptoms

•Check engine light illuminated
•Erratic engine performance
•Decreased fuel efficiency
•Engine stalling or misfiring
•Unusual smells from exhaust
•Increased emissions

Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify the specific issue causing the check engine light.
2
Inspect the gas cap for proper sealing; replace if cracked or damaged.
3
Check the vehicle’s air filter for clogs or blockages and replace if necessary.
4
Examine the spark plugs and ignition coils for wear or damage and replace if needed.
5
Inspect the exhaust system for leaks or blockages.
6
Test the fuel pressure to ensure the fuel pump and fuel injector are functioning correctly.

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
•Fuel pressure gauge
•Wrench set
•Dielectric grease

Parts Required

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

Related Faults

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Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify the specific issue causing the check engine light.
2
Inspect the gas cap for proper sealing; replace if cracked or damaged.
3
Check the vehicle’s air filter for clogs or blockages and replace if necessary.
4
Examine the spark plugs and ignition coils for wear or damage and replace if needed.
5
Inspect the exhaust system for leaks or blockages.
6
Test the fuel pressure to ensure the fuel pump and fuel injector are functioning correctly.

Solution

1. Preparation

Gather necessary tools and parts.
Ensure the vehicle is parked on a flat surface and the engine is off.
Disconnect the battery to prevent electrical shorts during repair.

2. Replace Faulty Components

A. Spark Plugs and Ignition Coils

Tools Required: Socket set, torque wrench, dielectric grease.
Remove the ignition coil covers using a socket wrench.
Disconnect the electrical connectors from the ignition coils.
Remove the ignition coils and inspect them for cracks or corrosion.
Replace any faulty coils with new ones.
Remove old spark plugs using a spark plug socket.
Install new spark plugs, torquing to manufacturer specifications (typically 13-15 ft-lbs).
Apply dielectric grease to the inside of the ignition coil boots before reinstallation.

B. Fuel System Inspection

Tools Required: Fuel pressure gauge, safety goggles, gloves.
Connect the fuel pressure gauge to the fuel rail.
Turn the ignition on (do not start the engine) to check the fuel pressure.
Compare the reading with manufacturer specifications. Replace the fuel pump or injectors if pressure is below specifications.

3. Exhaust System Repair

Tools Required: Wrench set, exhaust sealant (if needed).
Visually inspect the exhaust system for any signs of cracks or rust.
Tighten any loose bolts or clamps.
Replace any damaged components, such as mufflers or catalytic converters.

4. Reconnect Battery

Reconnect the battery terminals securely.
Start the engine to check if the check engine light has turned off.