why is my Ford Explorer's check engine light on and how to reset it

Ford Explorer Fifth Generation (2011-2019)

Error Codes

1-2 hours

Time

medium

Difficulty

medium

Severity

3 min read

458 words

Problem Statement

Learn how to diagnose and reset the check engine light on your Ford Explorer. Step-by-step instructions and diagnostic tips included.

Affected Component

Engine

Estimated Time

1-2 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Always ensure the vehicle is in park and the ignition is off before connecting or disconnecting the OBD-II scanner.

Symptoms

•Check engine light illuminated on the dashboard
•Possible rough idle or engine performance issues
•Decreased fuel efficiency
•Unusual engine noises
•Engine stalling or hesitation during acceleration

Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify the specific trouble codes.
2
Review the codes and associated symptoms to determine the potential issues.
3
Inspect the vehicle for visible issues such as loose connections, damaged hoses, or leaks.
4
Check the engine oil and coolant levels to ensure they are within normal ranges.
5
Clear the codes using the scanner and monitor if the check engine light returns.

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
•Basic hand tools (socket set, screwdrivers)
•Safety glasses

Parts Required

•Replacement parts as needed based on diagnostic codes (e.g., sensors, gaskets)

Related Faults

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Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify the specific trouble codes.
2
Review the codes and associated symptoms to determine the potential issues.
3
Inspect the vehicle for visible issues such as loose connections, damaged hoses, or leaks.
4
Check the engine oil and coolant levels to ensure they are within normal ranges.
5
Clear the codes using the scanner and monitor if the check engine light returns.

Solution

1. Preparation

Tools Required: OBD-II scanner, basic hand tools (socket set, screwdrivers), safety glasses.
Ensure the vehicle is parked on a flat surface and the engine is off.

2. Scan for Trouble Codes

Connect the OBD-II scanner to the vehicle’s diagnostic port, usually located under the dashboard near the steering column.
Turn the ignition to the "ON" position (do not start the engine).
Follow the scanner prompts to retrieve and record the trouble codes.

3. Address Identified Issues

Based on the retrieved codes, follow specific repair procedures relevant to the detected problem (e.g., replacing a faulty sensor, tightening a loose gas cap).

4. Clear the Check Engine Light

With the OBD-II scanner still connected, navigate to the option to clear codes.
Confirm the action, which will reset the check engine light.
Disconnect the scanner after clearing the codes.

5. Test Drive

Start the engine and allow it to reach normal operating temperature.
Drive the vehicle for a short distance to ensure the check engine light remains off.