why does my Ford Explorer Fifth Generation (2011-2019) have a check engine light and runs rough?

Ford Explorer Fifth Generation (2011-2019)

Error Codes

2-4 hours

Time

medium

Difficulty

high

Severity

3 min read

500 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 engine rough running and check engine light issues in Ford Explorer (2011-2019). Step-by-step guide with diagnostic procedures.

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 opening any components.

Symptoms

•Check engine light illuminated
•Rough idle
•Loss of power during acceleration
•Increased fuel consumption
•Engine stalling intermittently
•Unusual engine noises (e.g., knocking or pinging)

Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify trouble codes.
2
Inspect the engine air filter for blockages or dirt.
3
Check spark plugs and ignition coils for wear or damage.
4
Examine fuel injectors for clogs or malfunction.
5
Test the fuel pressure to ensure it meets specifications.
6
Inspect vacuum lines for leaks that could affect air intake.

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

Parts Required

•Spark plugs
•Fuel injectors (if replacement is necessary)
•Air filter

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Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify trouble codes.
2
Inspect the engine air filter for blockages or dirt.
3
Check spark plugs and ignition coils for wear or damage.
4
Examine fuel injectors for clogs or malfunction.
5
Test the fuel pressure to ensure it meets specifications.
6
Inspect vacuum lines for leaks that could affect air intake.

Solution

1. Preparation

Gather tools and parts.
Disconnect the battery to prevent electrical shorts.
Allow the engine to cool down before performing any work.

2. Replace Spark Plugs

Remove the ignition coils by unscrewing the retaining bolts and disconnecting electrical connectors.
Using a spark plug socket, remove the old spark plugs from the engine.
Inspect the threads and clean if necessary.
Install new spark plugs, applying anti-seize lubricant to the threads.
Torque the spark plugs to the manufacturer’s specifications (typically 12-15 ft-lbs).
Reinstall the ignition coils.

3. Clean or Replace Fuel Injectors

If necessary, remove the fuel rail by disconnecting the fuel lines and bolts.
Remove the injectors from the rail.
Clean injectors using a fuel injector cleaning kit or replace them if they are faulty.
Reinstall fuel injectors onto the rail and reconnect fuel lines ensuring a tight fit.

4. Repair Vacuum Leaks

Inspect all vacuum lines visually for cracks or disconnections.
Replace any faulty vacuum lines with new hoses.
Use a smoke machine if available to detect hard-to-find leaks.

5. Check and Replace Air Filter

Locate the air intake box and open it.
Remove the old air filter and inspect for dirt and damage.
Install a new air filter, ensuring it fits snugly in the intake box.