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

489 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 engine to cool before opening any components to avoid burns.

Symptoms

•Check engine light illuminated
•Rough idle or engine misfire
•Decreased fuel economy
•Engine stalling or hesitating during acceleration
•Increased emissions or failed emissions test
•Unusual noises from the engine compartment

Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify specific trouble codes.
2
Inspect the gas cap for proper sealing; replace if damaged or loose.
3
Check engine oil and coolant levels to ensure they are within the proper ranges.
4
Inspect the air filter for clogs or excessive dirt that may affect performance.
5
Examine the ignition system components, including spark plugs and wires.
6
Test the fuel system for pressure and leaks using a fuel pressure gauge.

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

Parts Required

•Spark plugs
•Ignition coils (if faulty)
•Sensors (if identified as defective from diagnostics)

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 proper sealing; replace if damaged or loose.
3
Check engine oil and coolant levels to ensure they are within the proper ranges.
4
Inspect the air filter for clogs or excessive dirt that may affect performance.
5
Examine the ignition system components, including spark plugs and wires.
6
Test the fuel system for pressure and leaks using a fuel pressure gauge.

Solution

1. Preparation

Gather tools and parts needed for repair.
Ensure the vehicle is parked on a level surface and the engine is cool.
Disconnect the battery before working on electrical components.

2. Address Faulty Components

A. Replace Spark Plugs

Remove the engine cover (if applicable) using a socket set.
Disconnect ignition coil connectors and remove the coils.
Using a spark plug socket, remove old spark plugs.
Install new spark plugs by hand to avoid cross-threading, then torque to manufacturer's specifications (usually around 13-15 ft-lbs).
Reinstall ignition coils and reconnect connectors.

B. Repair or Replace Faulty Sensors

Identify the faulty sensor from the OBD-II scan results (e.g., O2 sensor, MAF sensor).
Disconnect the electrical connector from the sensor.
Unbolt the sensor using the appropriate socket size.
Install the new sensor, ensuring it is properly seated and torqued.
Reconnect the electrical connector.

3. Clear Codes

Using the OBD-II scanner, clear the trouble codes after repairs are completed.
Reconnect the battery if it was disconnected.