why does my Ford Explorer Fifth Generation (2011-2019) check engine light keep flashing

Ford Explorer Fifth Generation (2011-2019)

Error Codes

3-5 hours

Time

medium

Difficulty

high

Severity

3 min read

571 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 to diagnose and fix a flashing check engine light on your Ford Explorer (2011-2019). Step-by-step guide with symptoms, diagnostic steps, and repair instructions.

Affected Component

Engine

Estimated Time

3-5 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Disconnect the battery before working on electrical systems.
•Allow the engine to cool before performing any inspections or repairs.

Symptoms

•Flashing check engine light
•Rough engine idle
•Decreased engine power
•Poor fuel economy
•Increased exhaust emissions
•Engine stalling

Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify specific trouble codes.
2
Inspect the spark plugs for wear or damage, as misfiring could cause the light to flash.
3
Check ignition coils and wires for faults or corrosion.
4
Examine fuel injectors for clogs or malfunctions.
5
Inspect the air intake system for leaks or blockages.
6
Review the exhaust system for any signs of back pressure or blockage.

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
•Ratchet and extension
•Torque wrench
•Fuel injector cleaner or ultrasonic cleaner

Parts Required

•OEM spark plugs
•Ignition coils (if needed)
•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 the spark plugs for wear or damage, as misfiring could cause the light to flash.
3
Check ignition coils and wires for faults or corrosion.
4
Examine fuel injectors for clogs or malfunctions.
5
Inspect the air intake system for leaks or blockages.
6
Review the exhaust system for any signs of back pressure or blockage.

Solution

1. Preparation

Gather tools and parts required for repairs.
Ensure the vehicle is parked on a flat surface and the engine is cool.
Disconnect the battery to prevent electrical shorts.

2. Inspect and Replace Spark Plugs

Remove the engine cover if applicable.
Use a spark plug socket and ratchet to remove each spark plug.
Inspect the condition of the spark plugs (look for wear or carbon buildup).
Replace with OEM spark plugs, ensuring they are gapped according to manufacturer specifications.

3. Check and Replace Ignition Coils

Locate the ignition coils; they are mounted on top of the engine.
Disconnect electrical connectors from each coil.
Remove bolts securing the coils and pull them out.
Inspect for cracks or corrosion.
Install new ignition coils, ensuring they are seated properly and reconnect the electrical connectors.

4. Clean or Replace Fuel Injectors

If injectors are clogged, remove them using the appropriate tools.
Use a fuel injector cleaner or ultrasonic cleaner, or replace them if necessary.
Reinstall the cleaned or new injectors, ensuring O-rings are lubricated and seated properly.

5. Inspect Air Intake System

Check the air filter and replace it if dirty.
Inspect the intake hoses for leaks or cracks.
Ensure the Mass Air Flow (MAF) sensor is clean; use a dedicated MAF cleaner if needed.

6. Inspect Exhaust System

Check for any visible damage or signs of blockage in the exhaust system.
If necessary, inspect the catalytic converter for proper function and replace if it is clogged.