why does my Ford Explorer Fifth Generation (2011-2019) check engine light keep coming on

Ford Explorer Fifth Generation (2011-2019)

Error Codes

2-4 hours

Time

medium

Difficulty

medium

Severity

3 min read

575 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 the battery before working on electrical systems.
•Allow the engine to cool down before inspecting or working on engine components.

Symptoms

•Check engine light illuminated
•Decreased fuel efficiency
•Engine stalling or misfiring
•Rough idle or hesitation during acceleration
•Unusual noises from the engine compartment
•Increased emissions or failed emissions test

Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify specific trouble codes.
2
Check engine oil and coolant levels to ensure they are at proper levels.
3
Inspect the gas cap for proper sealing and any signs of damage.
4
Examine ignition components such as spark plugs and ignition coils for wear or failure.
5
Check for vacuum leaks in the intake manifold and associated hoses.
6
Test engine sensors (e.g., MAF, O2 sensors) for proper operation using a multimeter.

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
•Multimeter
•Vacuum gauge
•Basic hand tools
•Torque wrench

Parts Required

•Spark plugs
•Ignition coils
•Mass airflow sensor (if needed)
•Oxygen sensors (if needed)
•Vacuum hoses (if needed)

Related Faults

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Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify specific trouble codes.
2
Check engine oil and coolant levels to ensure they are at proper levels.
3
Inspect the gas cap for proper sealing and any signs of damage.
4
Examine ignition components such as spark plugs and ignition coils for wear or failure.
5
Check for vacuum leaks in the intake manifold and associated hoses.
6
Test engine sensors (e.g., MAF, O2 sensors) for proper operation using a multimeter.

Solution

1. Preparation

Gather tools: OBD-II scanner, socket set, multimeter, vacuum gauge, and basic hand tools.
Ensure the vehicle is parked on a level surface and the engine is cool.

2. Address Error Codes

Use the OBD-II scanner to read and note any error codes.
Research and prioritize repairs based on the codes retrieved.

3. Inspect and Replace Ignition Components

Spark Plugs:
- Remove the ignition coil using a socket set.
- Unscrew and remove the spark plug using a spark plug socket.
- Inspect for wear; replace with OEM parts if necessary, torquing to manufacturer specifications (typically around 13-15 ft-lbs).
Ignition Coils:
- If necessary, replace faulty coils by removing them from their connectors and reinstalling new units securely.

4. Check and Replace Sensors

Mass Airflow Sensor (MAF):
- Disconnect the MAF sensor connector and remove it from the air duct.
- Clean using MAF cleaner; if faulty, replace with a new sensor.
Oxygen Sensors:
- Locate the O2 sensors, disconnect the harness, and unscrew using an O2 sensor socket.
- Replace with compatible sensors and reconnect.

5. Inspect for Vacuum Leaks

Use a vacuum gauge to check for proper vacuum levels.
Inspect all hoses and the intake manifold for cracks or disconnections; replace any damaged components.

6. Final Assembly and Testing

Reassemble all components, ensuring that all connections are secure.
Clear the error codes using the OBD-II scanner and perform a test drive to verify that the check engine light does not reappear.