how to diagnose the check engine light on my Ford Explorer Fifth Generation (2011-2019)

Ford Explorer Fifth Generation (2011-2019)

Error Codes

1-3 hours

Time

medium

Difficulty

medium

Severity

3 min read

560 words

Problem Statement

Learn how to diagnose and fix the check engine light issue on your Ford Explorer (2011-2019). Step-by-step guide with diagnostic procedures and repair instructions.

Affected Component

Engine

Estimated Time

1-3 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Disconnect the battery before working on electrical components
•Allow the engine to cool before inspecting the ignition system

Symptoms

•Check engine light illuminated
•Reduced engine performance
•Poor fuel economy
•Engine stalling or misfiring
•Unusual noises from the engine
•Increased emissions or failed emissions test

Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to retrieve diagnostic trouble codes (DTCs)
2
Note any freeze frame data associated with the codes to understand conditions when the fault occurred
3
Inspect the gas cap for damage or improper sealing, as this can trigger the check engine light
4
Check engine oil level and condition; low or contaminated oil can lead to related issues
5
Examine the air filter for clogs and the intake system for leaks or obstructions
6
Inspect the ignition system components, including spark plugs, wires, and coils for wear or failure

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
•Multimeter
•Torque wrench
•Safety glasses
•Smoke machine (optional)

Parts Required

•Spark plugs (if necessary)
•Ignition coils (if necessary)
•Oxygen sensor (if indicated)
•Gas cap (if damaged)

Related Faults

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Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to retrieve diagnostic trouble codes (DTCs)
2
Note any freeze frame data associated with the codes to understand conditions when the fault occurred
3
Inspect the gas cap for damage or improper sealing, as this can trigger the check engine light
4
Check engine oil level and condition; low or contaminated oil can lead to related issues
5
Examine the air filter for clogs and the intake system for leaks or obstructions
6
Inspect the ignition system components, including spark plugs, wires, and coils for wear or failure

Solution

1. Preparation

Gather tools: OBD-II scanner, socket set, multimeter, torque wrench, and safety glasses.
Ensure the vehicle is parked on a level surface and the engine is cool.

2. Address the Error Codes

Sub-step 1: Use the OBD-II scanner to clear the error codes after recording them.
Sub-step 2: If the check engine light returns, identify the specific code(s) and refer to the service manual for detailed troubleshooting related to those codes.

3. Inspect and Replace Components

Sub-step 1: For ignition system issues, remove spark plugs using the socket set and inspect for wear or carbon buildup. Replace if necessary.
Sub-step 2: Test ignition coils with a multimeter to ensure proper resistance; replace any faulty coils.
Sub-step 3: If the gas cap is damaged or worn, replace it with a manufacturer-recommended part to ensure proper sealing.

4. Repair or Replace Faulty Sensors

Sub-step 1: If codes indicate a faulty oxygen sensor, disconnect the battery, then unscrew the sensor using the socket set and remove it.
Sub-step 2: Install the new oxygen sensor, tighten to manufacturer specifications (typically 30-40 ft-lbs), and reconnect the battery.

5. Check and Repair Vacuum Leaks

Sub-step 1: Inspect vacuum hoses for cracks or disconnections and replace any damaged hoses.
Sub-step 2: Use a smoke machine to check for leaks in the intake system and repair as necessary.