why does my Ford Explorer Fifth Generation (2011-2019) check engine light keep turning on

Ford Explorer Fifth Generation (2011-2019)

Error Codes

1-3 hours

Time

medium

Difficulty

medium

Severity

3 min read

512 words

Problem Statement

Learn how to diagnose and fix the check engine light issue in Ford Explorer (2011-2019). Step-by-step guide with symptoms, diagnostic steps, 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 systems.
•Allow the engine to cool before opening the hood or working on engine components.

Symptoms

•Check engine light illuminated
•Rough idle or engine stalling
•Decreased fuel efficiency
•Engine misfires or hesitation during acceleration
•Unusual noises from the engine compartment
•Increased emissions

Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify specific fault codes.
2
Inspect the gas cap for cracks or improper sealing, which can trigger the check engine light.
3
Check engine oil and coolant levels to ensure they are within the appropriate range.
4
Examine the vehicle’s air intake system for leaks or blockages.
5
Test the battery and charging system to ensure they are functioning correctly.
6
Inspect spark plugs and ignition coils for wear or damage.

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
•Screwdrivers

Parts Required

•Replacement sensors (if faulty)
•New spark plugs (if worn)
•New ignition coils (if faulty)
•New gas cap (if defective)

Related Faults

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Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify specific fault codes.
2
Inspect the gas cap for cracks or improper sealing, which can trigger the check engine light.
3
Check engine oil and coolant levels to ensure they are within the appropriate range.
4
Examine the vehicle’s air intake system for leaks or blockages.
5
Test the battery and charging system to ensure they are functioning correctly.
6
Inspect spark plugs and ignition coils for wear or damage.

Solution

1. Preparation

Gather necessary tools and parts.
Ensure the vehicle is parked on a flat surface and the engine is cool.
Disconnect the negative battery terminal to prevent electrical shorts.

2. Address Fault Codes

Connect the OBD-II scanner to the vehicle’s diagnostic port and retrieve the error codes.
Research the specific codes to determine the related systems or components needing repair.

3. Replace Faulty Components

If codes indicate a faulted sensor (e.g., oxygen sensor, MAF sensor):
- Remove the faulty sensor using a socket set.
- Install the new sensor and ensure it is torqued to specifications (refer to manufacturer’s manual).
If the gas cap is defective:
- Remove the old gas cap.
- Install a new gas cap, ensuring it clicks securely in place.
If spark plugs or ignition coils show wear:
- Remove the ignition coils using a socket set.
- Replace spark plugs with new ones, ensuring they are gapped correctly (refer to specifications).
- Reinstall ignition coils, torquing to manufacturer specifications.

4. Reconnect Battery

Reconnect the negative battery terminal.
Ensure all connections are secure and clean.