why is my Ford Explorer Sixth Generation (2020-present) check engine light on and flashing

Ford Explorer Sixth Generation (2020-present)

Error Codes

2-4 hours

Time

medium

Difficulty

high

Severity

3 min read

505 words

⚠️ Safety Warning

This issue requires immediate attention. If you are not experienced with automotive repairs, consult a professional mechanic. Working on critical systems can be dangerous.

Problem Statement

Learn how to diagnose and fix a flashing check engine light on a Ford Explorer Sixth Generation (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 systems.
•Allow the engine to cool before inspecting components.

Symptoms

•Fluctuating engine performance
•Rough idling or stalling
•Decreased fuel efficiency
•Excessive exhaust smoke
•Noticeable engine noise or knocking

Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify specific issues.
2
Inspect the ignition system, including spark plugs and ignition coils.
3
Check fuel system pressure to ensure proper fuel delivery.
4
Examine the exhaust system for potential leaks or blockages.
5
Inspect for vacuum leaks around hoses and intake manifold.
6
Review the engine oil level and condition.

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
•Fuel pressure gauge
•Torque wrench
•Screwdrivers
•Vacuum gauge (optional)

Parts Required

•Spark plugs
•Ignition coils (if faulty)
•Fuel filter (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 ignition system, including spark plugs and ignition coils.
3
Check fuel system pressure to ensure proper fuel delivery.
4
Examine the exhaust system for potential leaks or blockages.
5
Inspect for vacuum leaks around hoses and intake manifold.
6
Review the engine oil level and condition.

Solution

1. Preparation

Gather necessary tools and parts.
Ensure the vehicle is on a flat surface and parked securely.
Disconnect the battery to prevent electrical shorts.

2. Scan for 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 any trouble codes displayed on the scanner.

3. Address Ignition System Issues

Remove the ignition coils:
- Unscrew the bolts holding the coils in place.
- Gently pull the coils from the spark plugs.
Inspect and replace worn spark plugs:
- Remove old spark plugs with a spark plug socket.
- Check the gap and replace with new spark plugs as needed (torque to manufacturer specifications).
Reinstall ignition coils securely.

4. Inspect Fuel System

Use a fuel pressure gauge to check fuel pressure:
- Connect the gauge to the fuel rail.
- Turn the ignition to the ON position and note the pressure reading.
If pressure is low, check the fuel pump and filter for clogs or failures.

5. Check for Vacuum Leaks

Visually inspect all vacuum hoses for cracks or disconnections.
Use a smoke machine or carburetor cleaner to detect leaks.

6. Reconnect Battery and Clear Codes

Reconnect the battery terminals.
Clear any codes from the OBD-II scanner.
Start the engine and observe for the check engine light.