why does my Ford Explorer's check engine light keep coming on

Ford Explorer Sixth Generation (2020-present)

Error Codes

2-4 hours

Time

medium

Difficulty

medium

Severity

3 min read

445 words

Problem Statement

Learn how to diagnose and fix the check engine light issue in Ford Explorer. 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 or removing parts.

Symptoms

•Check engine light illuminated
•Engine running roughly or misfiring
•Decreased fuel efficiency
•Unusual engine noises
•Poor acceleration or loss of power

Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify specific issues.
2
Inspect the gas cap for damage or improper sealing which may trigger the light.
3
Check the engine oil level and condition; low oil can cause engine issues.
4
Examine the air filter for dirt or blockage, which could affect performance.
5
Inspect spark plugs and ignition coils for wear or damage.
6
Review the exhaust system for leaks that could affect emissions readings.

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
•Spark plug socket
•Torque wrench
•Screwdriver set

Parts Required

•Spark plugs
•Ignition coils (if faulty)
•Air filter
•Gas cap (if faulty)

Related Faults

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Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify specific issues.
2
Inspect the gas cap for damage or improper sealing which may trigger the light.
3
Check the engine oil level and condition; low oil can cause engine issues.
4
Examine the air filter for dirt or blockage, which could affect performance.
5
Inspect spark plugs and ignition coils for wear or damage.
6
Review the exhaust system for leaks that could affect emissions readings.

Solution

1. Preparation

Gather tools and parts required for the repair.
Disconnect the negative battery terminal to ensure safety during the repair.

2. Replace Faulty Spark Plugs

Remove the engine cover (if applicable) using a socket set.
Disconnect the ignition coil connectors.
Remove the ignition coils by unscrewing them from the engine.
Use a spark plug socket to remove the old spark plugs.
Inspect the new spark plugs for the correct gap and install them into the engine.
Reinstall the ignition coils and reconnect the connectors.

3. Inspect and Replace Air Filter

Locate the air filter housing and release any clips or screws.
Remove the old air filter and inspect the housing for dirt or debris.
Install a new air filter, ensuring it is seated properly.
Reassemble the air filter housing securely.

4. Check and Replace Gas Cap

Inspect the gas cap for cracks or damage.
If necessary, replace the gas cap with a new one ensuring it is the correct type for the model.
Tighten the gas cap until it clicks to ensure a proper seal.

5. Test Drive and Reset Check Engine Light

Reconnect the negative battery terminal.
Start the engine and check for any remaining error codes using the OBD-II scanner.
Take the vehicle for a test drive to confirm that the check engine light remains off.

Tools Required:

OBD-II scanner
Socket set
Spark plug socket
Torque wrench (if necessary for spark plugs)
Screwdriver set

Parts Required:

Spark plugs
Ignition coils (if faulty)
Air filter
Gas cap (if faulty)

Estimated Repair Time: 2-4 hours

Safety Warnings:

Disconnect the battery before working on electrical components.
Allow the engine to cool before inspecting or removing parts.