why does my Ford Explorer Fifth Generation (2011-2019) check engine light come on and off

Ford Explorer Fifth Generation (2011-2019)

Error Codes

2-4 hours

Time

medium

Difficulty

medium

Severity

3 min read

554 words

Problem Statement

Learn how to diagnose and fix the intermittent check engine light issue 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 any components.

Symptoms

•Check engine light illuminated intermittently
•Engine may exhibit rough idle
•Possible decrease in fuel efficiency
•Occasional loss of power during acceleration
•Engine stalling during low-speed turns
•Unusual noises from the engine compartment

Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify specific trouble codes.
2
Inspect the gas cap for proper sealing or damage, as a loose or cracked cap can trigger the light.
3
Check for any vacuum leaks in hoses or intake manifold using a smoke machine or visual inspection.
4
Examine the ignition system components, including spark plugs and ignition coils, for wear or failure.
5
Inspect the fuel system, including fuel injectors and fuel pressure, for blockages or malfunctions.
6
Review the vehicle’s maintenance history for recent service work that may affect the engine management system.

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
•Vacuum gauge
•Multimeter
•Smoke machine

Parts Required

•Spark plugs (if worn)
•Ignition coils (if faulty)
•Fuel filter (if needed)

Related Faults

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Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify specific trouble codes.
2
Inspect the gas cap for proper sealing or damage, as a loose or cracked cap can trigger the light.
3
Check for any vacuum leaks in hoses or intake manifold using a smoke machine or visual inspection.
4
Examine the ignition system components, including spark plugs and ignition coils, for wear or failure.
5
Inspect the fuel system, including fuel injectors and fuel pressure, for blockages or malfunctions.
6
Review the vehicle’s maintenance history for recent service work that may affect the engine management system.

Solution

1. Preparation

Tools Required: OBD-II scanner, socket set, vacuum gauge, multimeter, smoke machine.
Ensure the vehicle is parked on a flat surface and the engine is turned off.
Disconnect the battery for safety while working on electrical components.

2. Addressing Fault Codes

Connect the OBD-II scanner to the vehicle's diagnostic port.
Retrieve and note any trouble codes.
Research the codes to determine specific components that may need inspection or replacement.

3. Inspecting the Gas Cap

Remove the gas cap and inspect for cracks or damage.
Clean the sealing surface of the filler neck.
Reinstall the gas cap and ensure it clicks securely.

4. Checking for Vacuum Leaks

Use a smoke machine to introduce smoke into the intake system.
Observe for smoke escaping from any hoses or connections.
Replace any faulty hoses or gaskets found during this inspection.

5. Evaluating the Ignition System

Remove the spark plugs using a socket and ratchet.
Inspect each spark plug for wear or fouling; replace if necessary.
Test ignition coils with a multimeter to verify they are within specifications; replace any faulty coils.

6. Inspecting the Fuel System

Check fuel pressure using a fuel pressure gauge; compare the reading to manufacturer specifications.
Inspect fuel injectors for clogs or malfunction; clean or replace as necessary.
If necessary, replace the fuel filter if it hasn't been changed recently.