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

477 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.

Symptoms

•Check engine light illuminated
•Rough idle
•Decreased fuel efficiency
•Engine stalling or misfiring
•Unusual engine noises (knocking or pinging)
•Increased emissions (failed emissions test)

Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify specific trouble codes.
2
Check the vehicle's gas cap for tightness and any signs of wear or damage.
3
Inspect the engine air filter for clogs or dirt accumulation.
4
Examine the spark plugs and ignition coils for wear or damage.
5
Test the fuel pressure to ensure the fuel pump and regulator are functioning properly.
6
Inspect for vacuum leaks in hoses 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
•Oxygen sensor socket
•Screwdrivers

Parts Required

•Oxygen sensor (if applicable)
•Spark plugs (if applicable)
•Vacuum hoses (if damaged)

Related Faults

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Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify specific trouble codes.
2
Check the vehicle's gas cap for tightness and any signs of wear or damage.
3
Inspect the engine air filter for clogs or dirt accumulation.
4
Examine the spark plugs and ignition coils for wear or damage.
5
Test the fuel pressure to ensure the fuel pump and regulator are functioning properly.
6
Inspect for vacuum leaks in hoses and connections.

Solution

1. Preparation

Gather all necessary tools and parts.
Disconnect the vehicle’s battery to ensure safety while working on electrical components.
Allow the engine to cool before starting work.

2. Replace Faulty Components

Check Engine Codes: Based on the diagnostic codes retrieved, identify faulty components (e.g., oxygen sensors, catalytic converter, etc.).
Replace Components:
- If an oxygen sensor is faulty, disconnect the electrical connector and unscrew the sensor using an oxygen sensor socket. Install the new sensor and reconnect the electrical connector.
- For spark plugs, remove the ignition coil by unscrewing it, then use a spark plug socket to remove the old plugs. Install new spark plugs to the specified torque (typically around 13-15 lb-ft).

3. Inspect and Repair Vacuum Leaks

Inspect all vacuum hoses and connections for cracks or loose fittings.
Replace any damaged hoses and ensure all connections are secure.

4. Reset the Check Engine Light

Reconnect the battery and use the OBD-II scanner to clear the error codes.
Start the engine and let it idle for a few minutes to ensure the check engine light does not return.