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

Ford Explorer Fifth Generation (2011-2019)

Error Codes

2-4 hours

Time

medium

Difficulty

medium

Severity

3 min read

555 words

Problem Statement

Learn how to diagnose and fix the check engine light issue in Ford Explorer Fifth Generation (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 battery before working on electrical systems.
•Allow the engine to cool before inspecting components to prevent burns.

Symptoms

•Check engine light illuminated
•Rough engine idle
•Decreased fuel efficiency
•Engine stalling during acceleration
•Increased emissions
•Unusual noises from the engine compartment

Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify the specific trouble codes.
2
Inspect the gas cap for proper sealing; a loose or damaged cap can trigger the check engine light.
3
Check the vehicle's battery voltage and connections; poor connections can cause various electrical issues.
4
Inspect engine components such as spark plugs, ignition coils, and fuel injectors for wear or damage.
5
Test the exhaust system for leaks or blockages that could affect emissions readings.
6
Examine the intake system for vacuum leaks or air filter clogging that may disrupt air-fuel mixture.

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
•Vacuum gauge
•Torque wrench

Parts Required

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

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Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify the specific trouble codes.
2
Inspect the gas cap for proper sealing; a loose or damaged cap can trigger the check engine light.
3
Check the vehicle's battery voltage and connections; poor connections can cause various electrical issues.
4
Inspect engine components such as spark plugs, ignition coils, and fuel injectors for wear or damage.
5
Test the exhaust system for leaks or blockages that could affect emissions readings.
6
Examine the intake system for vacuum leaks or air filter clogging that may disrupt air-fuel mixture.

Solution

1. Preparation

Gather tools: OBD-II scanner, socket set, multimeter, vacuum gauge, and torque wrench.
Disconnect the battery before beginning any repairs to ensure safety.

2. Address Error Codes

Connect the OBD-II scanner to the vehicle's diagnostic port.
Retrieve and document any trouble codes.
Research the codes to determine the necessary repairs based on the manufacturer’s specifications.

3. Inspect and Replace Components

Spark Plugs and Ignition Coils
- Remove the engine cover if applicable.
- Disconnect the electrical connectors from the ignition coils.
- Remove the ignition coils using a socket wrench.
- Replace spark plugs with new units, ensuring they are gapped to specifications.
- Reinstall ignition coils and reconnect electrical connectors.
Fuel Injectors
- Disconnect the fuel pump relay to relieve system pressure.
- Remove fuel injector connectors and unscrew the fuel rail.
- Replace faulty fuel injectors with new ones, ensuring proper orientation and sealing.

4. Check and Repair Exhaust System

Inspect the exhaust system for any visible damage or leaks.
Use a vacuum gauge to test for blockages in the exhaust system.
Replace any damaged components, such as gaskets or catalytic converters, using appropriate torque specifications.

5. Verify Intake System

Inspect air intake hoses and connections for cracks or loose fittings.
Replace the air filter if dirty.
Ensure the throttle body is clean and functioning properly.