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

Ford Explorer Fifth Generation (2011-2019)

Error Codes

1-3 hours

Time

medium

Difficulty

medium

Severity

3 min read

462 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

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 performing any inspections or repairs.

Symptoms

•Check engine light illuminated
•Possible rough idle
•Decreased fuel efficiency
•Engine stalling or hesitation during acceleration
•Increased emissions
•Unusual engine noises

Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify specific issues.
2
Inspect the gas cap for proper sealing and wear; replace if necessary.
3
Check engine oil and coolant levels to ensure they are within normal ranges.
4
Visual inspection of vacuum hoses and electrical connections for any signs of damage or disconnection.
5
Examine the exhaust system for leaks or blockages.
6
Test the battery and alternator output to confirm proper electrical system functionality.

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
•Wrench set
•Torque wrench
•Penetrating oil

Parts Required

•Oxygen sensor
•Gas cap

Related Faults

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Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify specific issues.
2
Inspect the gas cap for proper sealing and wear; replace if necessary.
3
Check engine oil and coolant levels to ensure they are within normal ranges.
4
Visual inspection of vacuum hoses and electrical connections for any signs of damage or disconnection.
5
Examine the exhaust system for leaks or blockages.
6
Test the battery and alternator output to confirm proper electrical system functionality.

Solution

1. Preparation

Gather tools and materials needed for repair.
Disconnect the negative battery terminal to ensure safety.
Allow the engine to cool if it has recently been running.

2. Address Fault Codes

Sub-step 1: Use the OBD-II scanner to read and document the fault codes.
Sub-step 2: Research the fault codes to determine necessary repairs (e.g., replace oxygen sensor, clear codes).

3. Inspect and Repair Components

Sub-step 1: If the code indicates a faulty oxygen sensor, locate the sensor(s) according to the repair manual.
Sub-step 2: Remove the oxygen sensor using a wrench; apply penetrating oil if necessary.
Sub-step 3: Install the new oxygen sensor and torque to the manufacturer's specifications (typically around 30 lb-ft).

4. Clear Codes and Test

Sub-step 1: Reconnect the battery terminal.
Sub-step 2: Use the OBD-II scanner to clear the error codes.
Sub-step 3: Start the engine and observe if the check engine light remains off.

5. Final Inspection

Sub-step 1: Conduct a test drive to monitor for any returning symptoms.
Sub-step 2: Check for any reappearance of the check engine light after the drive.