why is my Ford Explorer Fifth Generation (2011-2019) check engine light on and flashing

Ford Explorer Fifth Generation (2011-2019)

Error Codes

2-4 hours

Time

medium

Difficulty

high

Severity

3 min read

524 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 the flashing check engine light on your Ford Explorer (2011-2019). Step-by-step guide with symptoms and solutions.

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 mechanical work.

Symptoms

•Check engine light flashing
•Engine misfire or rough idle
•Decreased engine performance or power loss
•Poor fuel economy
•Unusual exhaust odors (e.g., fuel smell)
•Increased engine vibrations

Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify specific trouble codes.
2
Inspect spark plugs and ignition coils for wear or damage.
3
Check fuel injector operation and cleanliness.
4
Examine the air intake system for leaks or blockages.
5
Inspect exhaust system for restrictions or leaks.
6
Conduct a compression test on the engine cylinders to check for internal issues.

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 injector cleaning kit
•Compression tester

Parts Required

•Spark plugs
•Ignition coils
•Fuel injectors (if needed)
•Air filter

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Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify specific trouble codes.
2
Inspect spark plugs and ignition coils for wear or damage.
3
Check fuel injector operation and cleanliness.
4
Examine the air intake system for leaks or blockages.
5
Inspect exhaust system for restrictions or leaks.
6
Conduct a compression test on the engine cylinders to check for internal issues.

Solution

1. Preparation

Ensure the vehicle is parked on a level surface and the engine is cool.
Gather tools and parts required for repair.
Disconnect the negative battery terminal for safety.

2. Replace Faulty Spark Plugs and Ignition Coils

Remove the engine cover if necessary using a socket set.
Unscrew the ignition coils and carefully pull them out.
Replace worn spark plugs with new ones, ensuring the gap is set to the manufacturer's specifications (typically around 0.054 inches for Ford).
Reinstall ignition coils, securing them with the appropriate torque (usually 12-15 ft-lbs).
Reconnect the engine cover.

3. Clean or Replace Fuel Injectors

If fuel injectors are found to be dirty, use a fuel injector cleaning kit to flush them.
If malfunctioning, remove the fuel rail and disconnect the fuel lines (ensure to relieve fuel pressure first).
Replace the faulty fuel injector(s) with new ones, ensuring proper seating and torque specifications.

4. Inspect and Repair Air Intake System

Check the air filter for dirt and replace if necessary.
Inspect the intake manifold and hoses for leaks, replacing any damaged components.

5. Verify Exhaust System Integrity

Check for any visible exhaust leaks or damaged components (e.g., catalytic converter).
Replace any damaged exhaust components to ensure proper flow.