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

Ford Explorer Fifth Generation (2011-2019)

Error Codes

1-3 hours

Time

medium

Difficulty

medium

Severity

3 min read

506 words

Problem Statement

Learn how to diagnose and fix the check engine light issue in Ford Explorer (2011-2019). Step-by-step guide with diagnostic procedures and repair instructions.

Affected Component

Engine

Estimated Time

1-3 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

•Check engine light illuminated
•Decreased fuel efficiency
•Rough idle or engine misfires
•Poor acceleration or power loss
•Unusual noises from the engine
•Increased exhaust emissions

Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify specific issues.
2
Inspect the gas cap for damage or improper sealing, as this can trigger the check engine light.
3
Check engine oil and coolant levels to ensure they are within the proper range.
4
Inspect ignition components (spark plugs, coils) for wear or failure.
5
Examine the air intake system for leaks or blockages.
6
Test the fuel system for proper pressure and functionality.

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
•Screwdriver set
•Multimeter

Parts Required

•Replacement spark plugs
•Ignition coils (if faulty)
•O2 sensor or MAF sensor (if indicated by codes)

Related Faults

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Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify specific issues.
2
Inspect the gas cap for damage or improper sealing, as this can trigger the check engine light.
3
Check engine oil and coolant levels to ensure they are within the proper range.
4
Inspect ignition components (spark plugs, coils) for wear or failure.
5
Examine the air intake system for leaks or blockages.
6
Test the fuel system for proper pressure and functionality.

Solution

1. Preparation

Gather all necessary tools and parts.
Ensure the vehicle is parked on a flat surface and the engine is cool.
Disconnect the battery to reset the system if necessary.

2. Code Diagnosis

Connect the OBD-II scanner to the vehicle's diagnostic port.
Retrieve and document any error codes.
Research the codes to determine potential issues.

3. Repair or Replace Identified Components

If code indicates a faulty sensor (e.g., O2 sensor, MAF sensor):
1. Locate the sensor as per the vehicle's service manual.
2. Disconnect the electrical connector.
3. Remove the sensor using the appropriate socket.
4. Install the new sensor, ensuring it is tightened to the manufacturer's specifications.
5. Reconnect the electrical connector.
If a misfire is indicated:
1. Inspect and replace spark plugs and ignition coils as needed.
2. Ensure all connections are secure and free of corrosion.

4. Clear Codes and Reconnect Battery

Use the OBD-II scanner to clear any stored error codes.
Reconnect the battery terminals, ensuring they are tightly secured.

5. Test Drive

Start the vehicle and allow it to reach operating temperature.
Monitor the engine's performance for any signs of issues.