why does my Ford Explorer Sixth Generation (2020-present) 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

556 words

Problem Statement

Learn how to diagnose and fix the check engine light issue in your Ford Explorer (2020-present). 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 performing any inspections or repairs.

Symptoms

•Check engine light is illuminated on the dashboard
•Engine may run roughly or idle inconsistently
•Decreased fuel efficiency
•Engine stalling or misfiring during acceleration
•Unusual smells from the exhaust
•Increased emissions output

Diagnostic Steps

1
Scan the vehicle’s onboard diagnostics (OBD-II) system using a scanner to retrieve error codes.
2
Inspect the gas cap for tightness or damage.
3
Check for any visible leaks in the vacuum hoses connected to the intake manifold.
4
Inspect the condition of spark plugs and ignition coils.
5
Examine the exhaust system for any blockages or leaks.
6
Test the mass airflow sensor (MAF) and throttle position sensor (TPS) for proper functionality.

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 (optional)
•Torque wrench

Parts Required

•Replacement gas cap (if faulty)
•Spark plugs (if worn)
•Ignition coils (if damaged)
•Vacuum hoses (if leaking)
•MAF sensor (if faulty)
•TPS (if faulty)

Related Faults

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Diagnostic Steps

1
Scan the vehicle’s onboard diagnostics (OBD-II) system using a scanner to retrieve error codes.
2
Inspect the gas cap for tightness or damage.
3
Check for any visible leaks in the vacuum hoses connected to the intake manifold.
4
Inspect the condition of spark plugs and ignition coils.
5
Examine the exhaust system for any blockages or leaks.
6
Test the mass airflow sensor (MAF) and throttle position sensor (TPS) for proper functionality.

Solution

1. Preparation

Gather necessary tools and parts.
Ensure the vehicle is parked on a level surface and the engine is cool.

2. Retrieve and Analyze Error Codes

Connect the OBD-II scanner to the vehicle’s diagnostic port.
Turn the ignition to the "On" position without starting the engine.
Retrieve and note the error codes displayed. This will guide further diagnostics.

3. Inspect and Replace Components

Gas Cap Inspection:
- Remove the gas cap and inspect for cracks or seals that may be damaged.
- Replace with a new gas cap if necessary.
Spark Plug and Ignition Coil Inspection:
- Remove the ignition coils using a socket set.
- Inspect spark plugs for wear, carbon buildup, or damage. Replace if necessary.
- Reinstall new or cleaned spark plugs and ignition coils.

4. Check and Repair Vacuum Leaks

Use a smoke machine or carburetor cleaner to identify vacuum leaks.
If leaks are found, replace faulty hoses or gaskets.

5. Test and Replace MAF and TPS if Required

Disconnect the MAF sensor and inspect for dirt or damage. Clean with MAF cleaner if dirty.
Test the TPS with a multimeter to ensure it is functioning within specifications. Replace if faulty.

6. Clear Error Codes

After repairs, reconnect the OBD-II scanner and clear the error codes.
Turn the vehicle on and observe if the check engine light returns.