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

561 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.

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 inspecting the throttle body or other engine components.

Symptoms

•Check engine light illuminated
•Rough idle at startup
•Decreased fuel efficiency
•Engine stalling during acceleration
•Unusual engine noises
•Increased exhaust emissions

Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify specific trouble codes.
2
Inspect the gas cap for tightness or damage, as a loose cap can trigger the check engine light.
3
Check engine oil and coolant levels to ensure they are within normal ranges.
4
Examine the air intake system for leaks or blockages.
5
Inspect the ignition system components, including spark plugs and ignition coils.
6
Test the fuel system pressure with a fuel pressure gauge to check for proper operation.

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
•Torque wrench
•Fuel pressure gauge
•Throttle body cleaner
•Basic socket set
•Screwdrivers

Parts Required

•New gas cap
•Spark plugs
•Ignition coils (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 tightness or damage, as a loose cap can trigger the check engine light.
3
Check engine oil and coolant levels to ensure they are within normal ranges.
4
Examine the air intake system for leaks or blockages.
5
Inspect the ignition system components, including spark plugs and ignition coils.
6
Test the fuel system pressure with a fuel pressure gauge to check for proper operation.

Solution

1. Preparation

Ensure the vehicle is parked on a flat surface and the engine is off.
Gather all tools and parts needed for the repair.

2. Address Fault Codes

Using the OBD-II scanner, note the specific fault codes and research their meanings.
Clear the codes and take the vehicle for a test drive to see if the codes return.

3. Inspect and Replace Components

Gas Cap: If the code indicates an EVAP leak, replace the gas cap with a new OEM or quality aftermarket part.
Spark Plugs and Ignition Coils:
- Remove the engine cover if necessary.
- Disconnect the ignition coil connectors and remove the bolts securing the coils.
- Replace the spark plugs with the manufacturer-recommended type and torque them to specifications (usually around 13-15 lb-ft).
- Reinstall the ignition coils and connectors.

4. Clean Air Intake System

Remove the air intake hose and inspect the throttle body for carbon buildup.
Use throttle body cleaner and a soft brush to clean the throttle body.
Reinstall the air intake hose securely.

5. Test Fuel System

Connect the fuel pressure gauge to the fuel rail.
Start the engine and check the pressure; it should match the specification (usually around 30-60 psi).
If pressure is low, inspect the fuel pump and filter for issues.

6. Final Reassembly

Reinstall any components that were removed during the inspection and repair.
Ensure all connections and hoses are secure.