how to diagnose the check engine light on my Ford Explorer Fifth Generation (2011-2019)

Ford Explorer Fifth Generation (2011-2019)

Error Codes

1-3 hours

Time

medium

Difficulty

medium

Severity

3 min read

509 words

Problem Statement

Learn how to diagnose and fix the check engine light issue on your Ford Explorer (2011-2019). Step-by-step guide with diagnostic procedures 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 down before performing any repairs.

Symptoms

•Check engine light illuminated
•Vehicle may exhibit rough idle
•Decreased fuel economy
•Engine stalling or misfiring
•Unusual noises from the engine compartment
•Increased emissions

Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify specific trouble codes.
2
Record the codes and research their meanings to determine potential issues.
3
Inspect the vehicle’s gas cap for proper sealing and condition.
4
Check engine oil and coolant levels to ensure they are within normal ranges.
5
Visually inspect the wiring and connectors related to the engine sensors for damage or corrosion.
6
Conduct a visual inspection for any vacuum leaks in hoses and intake manifold.

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
•Screwdriver set
•Torque wrench

Parts Required

•Oxygen sensor (if faulty)
•Mass airflow sensor (if faulty)
•Vacuum hoses or gaskets (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
Record the codes and research their meanings to determine potential issues.
3
Inspect the vehicle’s gas cap for proper sealing and condition.
4
Check engine oil and coolant levels to ensure they are within normal ranges.
5
Visually inspect the wiring and connectors related to the engine sensors for damage or corrosion.
6
Conduct a visual inspection for any vacuum leaks in hoses and intake manifold.

Solution

1. Preparation

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

2. Clear Error Codes

Connect the OBD-II scanner and navigate to the option to clear error codes.
Follow the prompts on the scanner to erase the codes from the vehicle's memory.
Disconnect the scanner and reconnect the battery.

3. Repair Identified Issues

If a faulty sensor is indicated (e.g., oxygen sensor, mass airflow sensor), replace the defective component:
- Oxygen Sensor Replacement:
  - Locate the faulty oxygen sensor.
  - Use a wrench to unscrew the old sensor.
  - Install the new sensor, ensuring it is tightened to the manufacturer's specifications (typically around 30 lb-ft).
- Mass Airflow Sensor Replacement:
  - Disconnect the electrical connector and unscrew the sensor from the air intake duct.
  - Install the new sensor and reconnect the electrical connector.
If any vacuum leaks are found, replace damaged hoses or gaskets.

4. Finalize Repairs

Reconnect the battery terminals.
Start the engine and allow it to idle for a few minutes.
Check for any unusual noises or leaks.