how to fix the emission issues in my Ford Explorer Fifth Generation (2011-2019)

Ford Explorer Fifth Generation (2011-2019)

Error Codes

3-6 hours

Time

medium

Difficulty

high

Severity

4 min read

609 words

⚠️ Safety Warning

This issue requires immediate attention. If you are not experienced with automotive repairs, consult a professional mechanic. Working on critical systems can be dangerous.

Problem Statement

Learn how to diagnose and fix emission issues in Ford Explorer Fifth Generation (2011-2019). Step-by-step guide with diagnostic procedures and repair instructions.

Affected Component

Exhaust System

Estimated Time

3-6 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 exhaust system.

Symptoms

•Check engine light illuminated
•Increased exhaust smoke
•Failed emissions test
•Rough idle or stalling
•Decreased fuel economy
•Strong fuel odor

Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify specific emission-related codes.
2
Inspect the vehicle's exhaust system for visible leaks or damage.
3
Check the condition of the oxygen sensors and catalytic converter for proper operation.
4
Examine the Mass Air Flow (MAF) sensor for dirt or malfunction.
5
Review the fuel system for leaks or faults, including fuel injectors and lines.
6
Test the EVAP (Evaporative Emission Control) system for leaks using a smoke test.

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
•O2 sensor socket
•Ratchet
•Torque wrench
•Socket set
•Exhaust pipe cutter
•Torch
•Jack and jack stands
•MAF sensor cleaner
•Screwdriver
•Smoke machine

Parts Required

•Oxygen sensors
•Catalytic converter
•MAF sensor
•EVAP system components

Related Faults

Share this solution

Comments

No comments yet

Be the first to share your thoughts

Back to Generation

Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify specific emission-related codes.
2
Inspect the vehicle's exhaust system for visible leaks or damage.
3
Check the condition of the oxygen sensors and catalytic converter for proper operation.
4
Examine the Mass Air Flow (MAF) sensor for dirt or malfunction.
5
Review the fuel system for leaks or faults, including fuel injectors and lines.
6
Test the EVAP (Evaporative Emission Control) system for leaks using a smoke test.

Solution

1. Preparation

Gather tools and parts needed for the repair.
Disconnect the battery to ensure safety while working on electrical components.
Allow the engine to cool before starting any work.

2. Replace Oxygen Sensors

Tools Required: O2 sensor socket, ratchet, torque wrench.
Sub-steps:
1. Locate the upstream and downstream oxygen sensors on the exhaust system.
2. Use the O2 sensor socket to unscrew and remove the faulty sensors.
3. Install the new sensors and torque them to the manufacturer's specifications (typically around 30-40 ft-lbs).
4. Reconnect the electrical connectors.

3. Inspect and Replace the Catalytic Converter (if necessary)

Tools Required: Socket set, exhaust pipe cutter, torch (if rusted), jack and jack stands.
Sub-steps:
1. Raise the vehicle using a jack and secure it with jack stands.
2. Inspect the catalytic converter for physical damage or blockage.
3. If replacement is needed, disconnect the exhaust pipes leading to the converter.
4. Cut the exhaust pipes if necessary, and remove the old catalytic converter.
5. Install the new catalytic converter, ensuring proper alignment and sealing.
6. Reconnect the exhaust pipes and secure all connections.

4. Clean or Replace MAF Sensor

Tools Required: MAF sensor cleaner (or isopropyl alcohol), screwdriver.
Sub-steps:
1. Disconnect the MAF sensor electrical connector.
2. Remove the MAF sensor from the air intake duct.
3. Clean the sensor element carefully with MAF cleaner; allow it to dry completely.
4. Reinstall the MAF sensor and reconnect the electrical connector.

5. Repair EVAP System

Tools Required: Smoke machine (for testing), basic hand tools.
Sub-steps:
1. Use a smoke machine to introduce smoke into the EVAP system to identify leaks.
2. Inspect and replace any damaged hoses or components.
3. Ensure the EVAP canister is functioning properly.