why does my Ford Explorer’s 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

486 words

Problem Statement

Learn how to diagnose and fix intermittent engine light issues in Ford Explorer. Step-by-step guide with symptoms, diagnostic steps, 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 components.
•Allow the engine to cool before performing any maintenance.

Symptoms

•Check engine light illuminated intermittently
•Engine runs rough at idle
•Decreased fuel efficiency
•Occasional stalling or hesitation during acceleration
•Unusual noises from the engine compartment

Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify potential issues.
2
Inspect the gas cap for a secure fit or any damage that may affect the fuel system.
3
Check engine oil and coolant levels to ensure they are within proper ranges.
4
Examine spark plugs and ignition coils for wear or damage.
5
Inspect vacuum hoses for leaks or cracks.
6
Test the battery and charging system to ensure proper voltage and connections.

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
•Pliers
•Spark plug socket

Parts Required

•Spark plugs
•Ignition coils (if necessary)
•Vacuum hoses (if necessary)
•New gas cap (if necessary)

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Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify potential issues.
2
Inspect the gas cap for a secure fit or any damage that may affect the fuel system.
3
Check engine oil and coolant levels to ensure they are within proper ranges.
4
Examine spark plugs and ignition coils for wear or damage.
5
Inspect vacuum hoses for leaks or cracks.
6
Test the battery and charging system to ensure proper voltage and connections.

Solution

1. Preparation

Gather tools and parts needed for repairs.
Disconnect the negative battery terminal to prevent electrical shock.
Ensure the engine is cool before starting any work.

2. Replace Faulty Spark Plugs and Ignition Coils

Tools Required: Socket set, spark plug socket, torque wrench
Remove the engine cover if necessary.
Disconnect the ignition coil connectors.
Remove the ignition coils and spark plugs using the spark plug socket.
Inspect and replace with new spark plugs (set to manufacturer’s torque specifications).
Reinstall ignition coils and reconnect the connectors.

3. Inspect and Replace Vacuum Hoses

Tools Required: Pliers, hose cutter (if necessary)
Visually inspect all vacuum hoses connected to the intake manifold for cracks or wear.
Replace any damaged hoses with new ones, ensuring proper fit and secure connections.

4. Check and Replace Gas Cap

Inspect the gas cap for cracks or damage.
If damaged, replace it with a new gas cap that meets OEM specifications.

5. Clear Error Codes

After completing repairs, use the OBD-II scanner to clear any stored error codes.
Reconnect the negative battery terminal.