how to replace the oxygen sensor on Ford Explorer Fifth Generation (2011-2019)

Ford Explorer Fifth Generation (2011-2019)

Error Codes

1-2 hours

Time

medium

Difficulty

medium

Severity

3 min read

498 words

Problem Statement

Step-by-step guide on how to replace the oxygen sensor on Ford Explorer (2011-2019). Includes symptoms, diagnostic steps, tools, and safety warnings.

Affected Component

Exhaust System

Estimated Time

1-2 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Disconnect the battery before working on electrical systems.
•Allow the exhaust system to cool before handling components.

Symptoms

•Check engine light illuminated
•Decreased fuel efficiency
•Rough engine idle
•Increased exhaust emissions
•Failure to pass emissions test

Diagnostic Steps

1
Scan the vehicle for error codes using an OBD-II scanner to confirm oxygen sensor fault.
2
Inspect the oxygen sensor wiring and connectors for any visible damage or corrosion.
3
Measure the voltage output of the oxygen sensor with a multimeter to check its functionality.
4
Check the exhaust system for leaks that could affect oxygen sensor readings.
5
Verify the vehicle's fuel trim readings to see if they are excessively high or low, indicating a potential issue with the oxygen sensor.

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
•Oxygen sensor socket
•Ratchet and extension
•Penetrating oil
•Torque wrench

Parts Required

•New oxygen sensor

Related Faults

Share this solution

Comments

No comments yet

Be the first to share your thoughts

Back to Generation

Diagnostic Steps

1
Scan the vehicle for error codes using an OBD-II scanner to confirm oxygen sensor fault.
2
Inspect the oxygen sensor wiring and connectors for any visible damage or corrosion.
3
Measure the voltage output of the oxygen sensor with a multimeter to check its functionality.
4
Check the exhaust system for leaks that could affect oxygen sensor readings.
5
Verify the vehicle's fuel trim readings to see if they are excessively high or low, indicating a potential issue with the oxygen sensor.

Solution

1. Preparation

Gather all necessary tools and parts.
Disconnect the negative battery terminal to prevent electrical shorts.
Allow the exhaust system to cool before proceeding.

2. Remove the Old Oxygen Sensor

Locate the oxygen sensor on the exhaust system (pre-catalytic converter or post-catalytic converter).
Use a socket wrench with an oxygen sensor socket to carefully unscrew the sensor from its mounting.
If the sensor is difficult to remove, use penetrating oil to lubricate the threads and wait a few minutes before trying again.

3. Install the New Oxygen Sensor

Apply a small amount of anti-seize compound to the threads of the new oxygen sensor to prevent it from seizing in the future (avoid getting compound on the sensor tip).
Screw the new oxygen sensor into the exhaust system by hand, then tighten it with the oxygen sensor socket. Torque to manufacturer specifications (typically around 30 lb-ft).
Reconnect the electrical connector to the new oxygen sensor, ensuring a secure connection.

4. Reconnect Battery and Test

Reconnect the negative battery terminal.
Start the engine and let it idle for a few minutes to allow the ECU to recognize the new sensor.
Monitor for any error codes using the OBD-II scanner and clear any existing codes.