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

541 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 the battery before working on electrical systems.
•Allow the engine to cool before opening any components to prevent burns.

Symptoms

•Check engine light illuminated
•Rough idle or engine stalling
•Poor fuel economy
•Increased emissions
•Engine misfires or loss of power
•Unusual smells from the exhaust

Diagnostic Steps

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

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
•Fuel pressure gauge
•Screwdrivers
•Pliers

Parts Required

•Spark plugs
•Ignition coils (if needed)
•Fuel filter (if needed)
•Gaskets or hoses (if needed)

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 proper sealing; a loose or damaged gas cap can trigger the check engine light.
3
Check engine oil and coolant levels to ensure they are within normal ranges.
4
Examine ignition components, including spark plugs and ignition coils, for wear or damage.
5
Inspect the air intake and exhaust systems for leaks or blockages.
6
Test the fuel system pressure to ensure proper fuel delivery.

Solution

1. Preparation

Gather necessary tools and parts.
Disconnect the vehicle's battery to ensure safety during repairs.
Allow the engine to cool before starting any work.

2. Address Error Codes

Sub-steps:
- Connect the OBD-II scanner to the vehicle's diagnostic port.
- Record the error codes displayed.
- Research each code to determine the appropriate repair steps.

3. Replace Worn Ignition Components

Sub-steps:
- Remove the engine cover if applicable.
- Disconnect the ignition coil connectors and remove the coils.
- Replace worn spark plugs, ensuring they are gapped correctly (typically 0.054 inches for most Ford engines).
- Reinstall ignition coils, securing them to the specified torque (usually around 10-12 ft-lbs).

4. Inspect and Repair Fuel System

Sub-steps:
- Locate the fuel pressure test port on the fuel rail.
- Connect the fuel pressure gauge and start the engine.
- Check if the fuel pressure is within manufacturer specifications (typically around 30-50 psi).
- If pressure is low, inspect the fuel pump and filter for blockages; replace if necessary.

5. Repair Intake/Exhaust Leaks

Sub-steps:
- Visually inspect hoses and connections for cracks or loose fittings.
- Use a smoke machine or soapy water to identify leaks in the intake system.
- Tighten or replace any damaged hoses.
- For exhaust leaks, inspect gaskets and connections; replace gaskets as needed.