my Ford Explorer Fifth Generation (2011-2019) has 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

544 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 check engine light and rough idle 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 engine components to cool before handling.

Symptoms

•Check engine light illuminated
•Rough idle
•Loss of power during acceleration
•Poor fuel economy
•Engine stalling at idle

Diagnostic Steps

1
Scan the vehicle's onboard diagnostics using an OBD-II scanner to retrieve error codes.
2
Inspect the engine's air intake system for any leaks or blockages.
3
Check the spark plugs and ignition coils for wear or damage.
4
Evaluate the fuel system pressure to ensure it’s within manufacturer specifications.
5
Inspect the mass air flow (MAF) sensor for dirt or malfunction.
6
Examine the exhaust system for backpressure 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
•Torque wrench
•Fuel pressure gauge
•MAF sensor cleaner

Parts Required

•Spark plugs
•Ignition coils (if damaged)
•MAF sensor (if faulty)
•Fuel filter (if clogged)

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Diagnostic Steps

1
Scan the vehicle's onboard diagnostics using an OBD-II scanner to retrieve error codes.
2
Inspect the engine's air intake system for any leaks or blockages.
3
Check the spark plugs and ignition coils for wear or damage.
4
Evaluate the fuel system pressure to ensure it’s within manufacturer specifications.
5
Inspect the mass air flow (MAF) sensor for dirt or malfunction.
6
Examine the exhaust system for backpressure or blockage.

Solution

1. Preparation

Gather necessary tools and parts.
Disconnect the negative battery terminal to ensure safety.
Allow the engine to cool down if it has been running.

2. Addressing Error Codes

Use the OBD-II scanner to note any diagnostic trouble codes (DTCs).
Research the codes to determine the components that may require attention.

3. Inspect and Replace Spark Plugs and Ignition Coils

Remove the engine cover if necessary.
Disconnect the electrical connectors from the ignition coils.
Remove the ignition coils using a socket set.
Inspect and replace any worn spark plugs.
- Torque new spark plugs to manufacturer specifications (usually around 13-15 lb-ft).
Reinstall the ignition coils and reconnect the electrical connectors.

4. Clean or Replace MAF Sensor

Locate the MAF sensor (typically found between the air filter and throttle body).
Disconnect the electrical connector and remove the sensor.
Clean the MAF sensor using MAF sensor cleaner (do not use other types of cleaners).
If the sensor is faulty, replace it with a new one and reconnect.

5. Inspect Fuel System

Use a fuel pressure gauge to check the fuel pressure at the fuel rail.
If pressure is low, check the fuel pump and filter for blockages or malfunctions.
Replace the fuel filter if it is clogged and consider replacing the fuel pump if it is not functioning properly.

6. Reassemble and Reconnect

Reconnect the battery terminal.
Ensure all components are securely fastened and hoses are properly connected.