my Ford Explorer Fifth Generation (2011-2019) has a check engine light and runs rough, what does it...

Ford Explorer Fifth Generation (2011-2019)

Error Codes

2-4 hours

Time

medium

Difficulty

high

Severity

3 min read

587 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

Diagnose and fix rough running and check engine light issues in Ford Explorer (2011-2019). 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 opening the hood or working on components.

Symptoms

•Check engine light illuminated
•Engine runs roughly or misfires
•Decreased fuel efficiency
•Engine stalling at idle
•Increased exhaust emissions
•Unusual engine noises (e.g., knocking or pinging)

Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify specific fault codes.
2
Inspect the ignition system components, including spark plugs, ignition coils, and wiring.
3
Check fuel system pressure and inspect fuel injectors for clogs or leaks.
4
Examine air intake system for leaks or obstructions, including the mass airflow sensor.
5
Verify engine vacuum levels and inspect hoses for leaks.
6
Review the exhaust system for blockages or issues with the catalytic converter.

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
•Vacuum gauge
•Torque wrench

Parts Required

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

Related Faults

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Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify specific fault codes.
2
Inspect the ignition system components, including spark plugs, ignition coils, and wiring.
3
Check fuel system pressure and inspect fuel injectors for clogs or leaks.
4
Examine air intake system for leaks or obstructions, including the mass airflow sensor.
5
Verify engine vacuum levels and inspect hoses for leaks.
6
Review the exhaust system for blockages or issues with the catalytic converter.

Solution

1. Preparation

Gather tools: OBD-II scanner, socket set, multimeter, fuel pressure gauge, vacuum gauge, and a torque wrench.
Ensure the vehicle is parked on a level surface and the engine is cool.

2. Address Fault Codes

Connect the OBD-II scanner and retrieve error codes.
Research the codes to identify the specific components or systems affected.
Clear the codes after noting them for future reference.

3. Inspect and Replace Ignition Components

Tools Required: Socket set, torque wrench
Remove the ignition coils and spark plugs.
Inspect for wear or damage; replace if necessary.
Reinstall new spark plugs to the manufacturer’s torque specifications (typically around 15-20 lb-ft).
Reinstall ignition coils ensuring they are seated properly.

4. Check and Repair Fuel System

Tools Required: Fuel pressure gauge, multimeter
Attach the fuel pressure gauge to the fuel rail to check for proper pressure according to manufacturer specifications.
If low, inspect the fuel pump and filter for issues.
Test fuel injectors with a multimeter; replace if they are not operating properly.

5. Inspect Air Intake and Vacuum System

Remove the air intake duct and inspect the mass airflow sensor for dirt; clean if necessary using MAF sensor cleaner.
Check for any visible cracks or leaks in the intake hoses.
Use a vacuum gauge to check for proper engine vacuum levels; repair any leaks found.

6. Examine Exhaust System

Inspect the exhaust for any blockages or damage, particularly around the catalytic converter.
If issues are found, replace the affected components according to manufacturer specifications.