how to fix Ford Explorer Fifth Generation (2011-2019) check engine light that won't turn off

Ford Explorer Fifth Generation (2011-2019)

Error Codes

2-4 hours

Time

medium

Difficulty

medium

Severity

3 min read

587 words

Problem Statement

Learn how to diagnose and fix the 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 battery before working on electrical systems.
•Allow engine to cool before opening any components related to the cooling system.

Symptoms

•Check engine light remains illuminated
•Vehicle may exhibit rough idle
•Loss of power during acceleration
•Poor fuel economy
•Engine stalling at idle or low speeds
•Increased emissions

Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify specific trouble codes.
2
Review the vehicle's maintenance history for any recent repairs or changes.
3
Inspect the gas cap for proper sealing or damage; a loose or faulty cap can trigger the light.
4
Check for vacuum leaks in the intake system using a smoke machine or by visually inspecting hoses.
5
Examine the ignition system components (spark plugs, coils) for wear or damage.
6
Test the fuel system for pressure and proper operation using a fuel pressure gauge.
7
Look for any other electrical issues such as faulty sensors or wiring that may affect engine performance.

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
•Multimeter
•Smoke machine

Parts Required

•New gas cap (if faulty)
•Spark plugs (if worn)
•Ignition coils (if faulty)
•Fuel filter (if required)
•Fuel pump (if necessary)

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Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify specific trouble codes.
2
Review the vehicle's maintenance history for any recent repairs or changes.
3
Inspect the gas cap for proper sealing or damage; a loose or faulty cap can trigger the light.
4
Check for vacuum leaks in the intake system using a smoke machine or by visually inspecting hoses.
5
Examine the ignition system components (spark plugs, coils) for wear or damage.
6
Test the fuel system for pressure and proper operation using a fuel pressure gauge.
7
Look for any other electrical issues such as faulty sensors or wiring that may affect engine performance.

Solution

1. Preparation

Tools Required: OBD-II scanner, socket set, torque wrench, fuel pressure gauge, multimeter, smoke machine.
Disconnect the negative battery terminal to ensure safety while working on electrical systems.

2. Address Error Codes

Connect the OBD-II scanner and retrieve the trouble codes.
Note the specific codes and research their meanings.
Clear the codes and see if the check engine light returns after a test drive (this helps confirm the issue).

3. Inspect and Replace Components

A. Gas Cap

If the gas cap is found to be faulty or loose:
- Remove the old gas cap.
- Install a new gas cap that meets OEM specifications.

B. Vacuum Leaks

If vacuum leaks are detected:
- Identify the source of the leak using a smoke machine.
- Replace damaged hoses or gaskets as necessary.

C. Ignition System

If spark plugs or coils are faulty:
- Remove the ignition coils and spark plugs.
- Replace with new components, ensuring proper torque specifications for installation (usually around 13 lb-ft for spark plugs).

D. Fuel System

If fuel pressure is low:
- Connect the fuel pressure gauge to the fuel rail.
- Compare readings to manufacturer specifications (usually around 30-50 psi for a Ford Explorer).
- Replace the fuel pump or filter if pressure is outside of specification.

4. Reconnect Battery

After completing the necessary repairs, reconnect the negative battery terminal.