why does my Ford Explorer Sixth Generation (2020-present) check engine light stay on

Ford Explorer Sixth Generation (2020-present)

Error Codes

1-3 hours

Time

medium

Difficulty

medium

Severity

3 min read

546 words

Problem Statement

Learn how to diagnose and fix the check engine light issue in a 2020-present Ford Explorer. Step-by-step guide with diagnostic procedures and repair instructions.

Affected Component

Engine

Estimated Time

1-3 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

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

Symptoms

•Check engine light illuminated continuously
•Reduced engine performance
•Decreased fuel efficiency
•Rough idling or stalling
•Unusual noises from the engine compartment
•Smell of fuel or exhaust

Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify specific issues.
2
Inspect the gas cap to ensure it is tight and undamaged; replace if necessary.
3
Check for visible leaks in the vacuum lines or intake system.
4
Examine the ignition system components, including spark plugs and coils.
5
Inspect the exhaust system for blockages or damage.
6
Test the battery voltage and charging system for proper operation.

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

Parts Required

•Replacement gas cap (if necessary)
•Spark plugs (if necessary)
•Ignition coils (if necessary)
•Vacuum hoses (if necessary)

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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 to ensure it is tight and undamaged; replace if necessary.
3
Check for visible leaks in the vacuum lines or intake system.
4
Examine the ignition system components, including spark plugs and coils.
5
Inspect the exhaust system for blockages or damage.
6
Test the battery voltage and charging system for proper operation.

Solution

1. Preparation

Gather tools: OBD-II scanner, socket set, multimeter, and vacuum gauge.
Ensure the vehicle is parked on a level surface and the engine is turned off.
Disconnect the negative battery terminal to avoid electrical shorts.

2. Retrieve and Address Error Codes

Reconnect the battery terminal.
Use the OBD-II scanner to retrieve stored error codes.
Document any codes and refer to the vehicle’s service manual for specific troubleshooting related to each code.

3. Inspect and Repair Components

Gas Cap Inspection
- Check if the gas cap is functioning properly. Ensure it clicks when closed.
- If damaged, replace with a new gas cap (refer to the manual for specifications).
Ignition System Check
- Remove spark plugs using a socket set and inspect for wear or carbon buildup.
- Replace spark plugs if damaged or worn beyond specification (typically 30,000-100,000 miles depending on type).
- Test ignition coils using a multimeter, replacing any that are malfunctioning.
Vacuum Leak Detection
- Use a vacuum gauge to test for leaks in the vacuum system.
- Inspect hoses and connections for cracks or disconnections, replacing any faulty components.

4. Check Exhaust System

Visually inspect the exhaust system for any visible signs of damage or blockage.
If a blockage is found (e.g., clogged catalytic converter), replace the affected component.

5. Final Checks

Clear the error codes using the OBD-II scanner.
Reconnect the battery terminal securely.
Start the engine and monitor the check engine light; it should turn off if repairs were successful.