how to resolve the P0135 code on my Honda Civic 10th Generation (2016-2021)?

Solution

1. Preparation

• Gather tools and parts needed for the repair.
• Ensure the vehicle is parked on a flat surface, and the engine is cool.
• Disconnect the negative battery terminal to prevent electrical shorts.

2. Replace the Oxygen Sensor

• Tools Required: Socket set, O2 sensor socket, Torque wrench, Wire brush (for cleaning connectors), Multimeter
• Locate the oxygen sensor (usually on the exhaust manifold or downstream).
• Disconnect the wiring harness from the oxygen sensor.
• Use the O2 sensor socket to unscrew the old sensor from its mounting location.
• Clean the threads of the mounting hole with a wire brush to remove debris and carbon deposits.
• Apply a small amount of anti-seize compound to the threads of the new oxygen sensor (if recommended).
• Screw in the new oxygen sensor by hand to avoid cross-threading, then use a torque wrench to tighten to manufacturer specifications (typically around 30-40 ft-lbs, refer to the specific service manual).
• Reconnect the wiring harness securely.

3. Check Connections and Fuses

• Tools Required: Multimeter
• Inspect the wiring harness and connectors for any signs of damage; repair or replace as necessary.
• Check the fuse related to the oxygen sensor heater circuit by using a multimeter or visually inspecting it. Replace if blown.

4. Reconnect Battery and Clear Codes

• Reconnect the negative battery terminal.
• Use the OBD-II scanner to clear the P0135 code from the vehicle's computer.