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

525 words

Problem Statement

Learn how to diagnose and fix the persistent 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 components.
•Allow the engine to cool before inspecting any parts related to the exhaust system.

Symptoms

•Check engine light illuminated
•Rough idle during engine operation
•Decreased fuel efficiency
•Occasional engine stalling
•Noticeable engine noise or vibrations

Diagnostic Steps

1
Scan the vehicle's onboard computer using an OBD-II scanner to retrieve error codes.
2
Inspect the gas cap for proper sealing and condition, ensuring it's not loose or damaged.
3
Check engine oil and coolant levels, looking for signs of leaks or contamination.
4
Examine the air filter for blockage or excessive dirt.
5
Inspect the exhaust system for any visible damage or leaks.
6
Test the mass airflow sensor (MAF) and oxygen sensors for proper functioning.

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
•Screwdrivers
•Torque wrench
•Mass airflow sensor cleaner

Parts Required

•Replacement gas cap (if needed)
•Replacement air filter
•Replacement oxygen sensor (if needed)

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Diagnostic Steps

1
Scan the vehicle's onboard computer using an OBD-II scanner to retrieve error codes.
2
Inspect the gas cap for proper sealing and condition, ensuring it's not loose or damaged.
3
Check engine oil and coolant levels, looking for signs of leaks or contamination.
4
Examine the air filter for blockage or excessive dirt.
5
Inspect the exhaust system for any visible damage or leaks.
6
Test the mass airflow sensor (MAF) and oxygen sensors for proper functioning.

Solution

1. Preparation

Gather necessary tools and parts.
Ensure you are working in a well-ventilated area and that the vehicle is parked on a level surface.
Disconnect the battery to prevent electrical shorts.

2. Address Error Codes

Using the OBD-II scanner, note down all error codes.
Research each code for specific issues related to the vehicle's systems.
Clear the codes and monitor if they return after a test drive.

3. Inspect and Replace Components

A. Gas Cap

Remove the gas cap and inspect the rubber seal for wear.
If damaged, replace with a new gas cap.

B. Air Filter

Remove the air filter housing cover.
Take out the old air filter and replace it with a new one.
Reassemble the housing cover securely.

C. Mass Airflow Sensor

Locate the MAF sensor, usually between the air filter and throttle body.
Disconnect the MAF sensor connector and remove it from the intake.
Clean the sensor with MAF cleaner and reinstall.

4. Oxygen Sensor Replacement

Identify the faulty oxygen sensor based on error codes.
Use a socket wrench to remove the old sensor.
Install the new oxygen sensor and reconnect the wiring harness.

5. Test Drive and Monitor

Reconnect the battery.
Start the engine and let it idle for a few minutes.
Test drive the vehicle to check if the check engine light remains off.