how to replace the oxygen sensor in Honda Accord 10th Generation (2018-2022)

Honda Accord 9th Generation (2013-2017)

Error Codes

1-2 hours

Time

medium

Difficulty

medium

Severity

3 min read

544 words

Problem Statement

Step-by-step guide to replace the oxygen sensor in Honda Accord 10th Generation (2018-2022). Learn symptoms, diagnostic steps, and tools required.

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 engine to cool before starting work on exhaust components.

Symptoms

•Check engine light illuminated
•Poor fuel economy
•Rough engine idle
•Increased emissions
•Decreased engine performance

Diagnostic Steps

1
Scan the vehicle's OBD-II system for error codes related to the oxygen sensor.
2
Visual inspection of the oxygen sensor wiring and connectors for damage or corrosion.
3
Measure the voltage output of the oxygen sensor with a multimeter to check for proper operation.
4
Check the vehicle's fuel trim values to see if they are outside normal ranges.
5
Confirm the location of the oxygen sensor (upstream or downstream) based on the vehicle’s configuration.

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
•Socket set (including 22mm and 10mm sockets)
•Torque wrench
•Oxygen sensor socket
•Dielectric grease
•Safety glasses
•Gloves

Parts Required

•New oxygen sensor (upstream or downstream based on requirement)
•Anti-seize compound (if not pre-applied)

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Diagnostic Steps

1
Scan the vehicle's OBD-II system for error codes related to the oxygen sensor.
2
Visual inspection of the oxygen sensor wiring and connectors for damage or corrosion.
3
Measure the voltage output of the oxygen sensor with a multimeter to check for proper operation.
4
Check the vehicle's fuel trim values to see if they are outside normal ranges.
5
Confirm the location of the oxygen sensor (upstream or downstream) based on the vehicle’s configuration.

Solution

1. Preparation

Tools Required: OBD-II scanner, socket set (including 22mm and 10mm sockets), torque wrench, oxygen sensor socket, dielectric grease, safety glasses, gloves.
Park the vehicle on a level surface and engage the parking brake.
Allow the engine to cool down completely before starting work.

2. Disconnect Battery

Disconnect the negative terminal of the battery to ensure safety while working on the electrical components.

3. Locate Oxygen Sensor

Identify the location of the oxygen sensor. The upstream sensor is typically located before the catalytic converter on the exhaust manifold, while the downstream sensor is after the catalytic converter.

4. Remove Old Oxygen Sensor

Use the oxygen sensor socket to loosen and remove the old sensor. Turn counterclockwise to unscrew it.
If the sensor is stuck, apply penetrating oil and let it sit for a few minutes before attempting to remove it again.

5. Install New Oxygen Sensor

Apply a small amount of anti-seize compound to the threads of the new oxygen sensor (if not pre-applied).
Screw the new sensor into place by hand, then use the oxygen sensor socket to tighten it to the manufacturer’s specifications (typically around 30-40 ft-lbs).

6. Reconnect Electrical Connector

Plug the electrical connector of the new oxygen sensor back into the wiring harness.
Ensure that the connector clicks into place securely.

7. Reconnect Battery

Reattach the negative terminal of the battery.

8. Clear Error Codes

Use the OBD-II scanner to clear any stored error codes and reset the check engine light.