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

Ford Explorer Sixth Generation (2020-present)

Error Codes

2-4 hours

Time

medium

Difficulty

high

Severity

4 min read

604 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 in a 2020-present 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 systems.
•Allow the engine to cool before working on the fuel or exhaust systems.

Symptoms

•Check engine light is flashing
•Decreased engine performance
•Rough idle or stalling
•Increased fuel consumption
•Unusual engine noises (e.g., knocking or pinging)
•Emissions test failure

Diagnostic Steps

1
Scan the vehicle for error codes using an OBD-II scanner to identify the source of the issue.
2
Check for any recent repairs or modifications that may have affected the engine system.
3
Inspect the ignition system components, including spark plugs and ignition coils, for any signs of wear or failure.
4
Examine the fuel system for issues such as low fuel pressure or clogged fuel injectors.
5
Check for vacuum leaks in the intake manifold and associated hoses.
6
Inspect exhaust system components, including the catalytic converter, for blockages or damage.

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
•Torque wrench
•Fuel pressure gauge
•Smoke machine or carb cleaner

Parts Required

•Spark plugs
•Ignition coils (if faulty)
•Fuel filter (if needed)
•Intake manifold gaskets (if leaks are found)

Related Faults

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Diagnostic Steps

1
Scan the vehicle for error codes using an OBD-II scanner to identify the source of the issue.
2
Check for any recent repairs or modifications that may have affected the engine system.
3
Inspect the ignition system components, including spark plugs and ignition coils, for any signs of wear or failure.
4
Examine the fuel system for issues such as low fuel pressure or clogged fuel injectors.
5
Check for vacuum leaks in the intake manifold and associated hoses.
6
Inspect exhaust system components, including the catalytic converter, for blockages or damage.

Solution

1. Preparation

Gather necessary tools and parts.
Ensure the vehicle is parked on a level surface and the engine is cool.
Disconnect the negative battery terminal to prevent electrical shorts.

2. Address Ignition System Issues

Tools Required: Socket set, torque wrench, feeler gauge.
Remove the engine cover if applicable.
Inspect and replace spark plugs if they are worn or fouled.
- Remove spark plugs using a socket wrench.
- Inspect the gap and replace if out of specification.
- Torque new spark plugs to manufacturer’s specifications (typically 13-16 lb-ft).
Check the ignition coils for damage and replace any faulty units.

3. Inspect Fuel System

Tools Required: Fuel pressure gauge.
Connect the fuel pressure gauge to the fuel rail test port.
Turn the ignition on (do not start the engine) and check the fuel pressure against specifications (typically 30-50 psi).
If pressure is low, inspect the fuel pump, filter, and injectors for blockages or failure.
Replace any faulty components as necessary.

4. Check for Vacuum Leaks

Tools Required: Smoke machine or carb cleaner.
Use a smoke machine to detect leaks in the intake manifold and associated hoses.
Alternatively, spray carb cleaner around suspected areas while the engine is idling; if the RPM changes, a leak is present.
Replace any damaged hoses or seals found during inspection.

5. Inspect Exhaust System

Tools Required: Jack and jack stands.
Raise the vehicle and visually inspect the exhaust system for holes or damage.
Check the catalytic converter for signs of clogging or damage.
Replace any defective components.