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

hard

Difficulty

high

Severity

3 min read

555 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 2011-2019 Ford Explorer. Step-by-step guide with diagnostic procedures 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 handling components.

Symptoms

•Flashing check engine light
•Engine misfire or rough running
•Decreased engine performance
•Increased fuel consumption
•Unusual engine noises

Diagnostic Steps

1
Scan the vehicle’s OBD-II system for error codes using an OBD-II scanner.
2
Check for any visible signs of damage or wear in ignition components (spark plugs, ignition coils).
3
Inspect the fuel system for issues, including fuel pressure and fuel injector operation.
4
Examine the air intake system for blockages or leaks.
5
Test engine compression to evaluate cylinder health.
6
Verify the operation of the engine coolant temperature sensor.

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
•Fuel pressure gauge
•Throttle body cleaner

Parts Required

•Spark plugs
•Ignition coils
•Fuel injectors (if necessary)
•Fuel filter
•Air intake hoses (if damaged)

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Diagnostic Steps

1
Scan the vehicle’s OBD-II system for error codes using an OBD-II scanner.
2
Check for any visible signs of damage or wear in ignition components (spark plugs, ignition coils).
3
Inspect the fuel system for issues, including fuel pressure and fuel injector operation.
4
Examine the air intake system for blockages or leaks.
5
Test engine compression to evaluate cylinder health.
6
Verify the operation of the engine coolant temperature sensor.

Solution

1. Preparation

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

2. Address Engine Misfire

Inspect Ignition Components:
- Remove the engine cover if present.
- Use a socket set to remove spark plugs.
- Inspect spark plugs for wear and replace if necessary.
- Check ignition coils for proper function; replace any that are faulty.
Inspect Fuel Injectors:
- Remove any necessary components to access fuel injectors.
- Test each injector with a multimeter to ensure they are functioning properly.
- Clean or replace any clogged injectors.

3. Check Fuel System

Fuel Pressure Test:
- Connect a fuel pressure gauge to the fuel rail.
- Start the engine and monitor the pressure; compare it to manufacturer specifications.
- Replace the fuel pump or filter if pressure is below specifications.

4. Inspect Air Intake System

Check for Leaks:
- Inspect the air intake hoses and connections for cracks or gaps.
- Replace any damaged hoses.
Clean Throttle Body:
- Remove the throttle body as per the manufacturer's instructions.
- Clean using throttle body cleaner and a soft cloth.

5. Check Engine Compression

Compression Test:
- Remove spark plugs and install a compression gauge.
- Crank the engine and record the compression readings for each cylinder.
- Compare the results to manufacturer specifications; replace engine components if readings are low.

6. Reassemble and Reconnect

Reassemble all components in the reverse order of disassembly.
Reconnect the battery and clear the engine codes using the OBD-II scanner.