how to fix P0135 O2 sensor code on Honda Civic 11th Generation (2022-Present)

Solution

1. Preparation

• Tools Required: OBD-II scanner, multimeter, socket set, torque wrench
• Ensure the vehicle is parked on a level surface and the engine is cool.
• Disconnect the negative battery terminal to prevent electrical shorts.

2. Inspect Wiring and Connectors

• Visually examine the wiring harness and connectors for the upstream O2 sensor.
• Repair or replace any damaged wires or connectors as necessary.
• Ensure all connections are secure and free from corrosion.

3. Replace O2 Sensor

• Tools Required: O2 sensor socket, penetrating oil, torque wrench
• Locate the upstream O2 sensor (usually found in the exhaust manifold).
• Apply penetrating oil to the O2 sensor threads and allow it to sit for a few minutes.
• Disconnect the electrical connector from the O2 sensor.
• Use the O2 sensor socket to remove the sensor by turning it counterclockwise.
• Install the new O2 sensor by threading it into the exhaust manifold and tightening it to the manufacturer’s torque specification (usually around 30-40 ft-lbs).
• Reconnect the electrical connector securely.

4. Reconnect Battery and Clear Codes

• Reconnect the negative battery terminal.
• Use the OBD-II scanner to clear the P0135 code.
• Start the engine and allow it to reach operating temperature.