how to fix P0131 code in Honda Accord 10th Generation (2018-2022)

Learn how to diagnose and fix P0131 oxygen sensor issue in Honda Accord 10th Generation. Step-by-step guide with diagnostic procedures and repair instructions.

Solution

1. Preparation

• Gather tools and parts needed for the repair.
• Disconnect the vehicle battery to prevent electrical shorts.
• Allow the engine to cool down before working on the exhaust system.

2. Inspect and Repair Wiring

• Remove the cover or panel protecting the wiring harness.
• Visually inspect for frayed wires, corrosion, or loose connectors.
• Repair any damaged wiring by splicing in new wire and securing connections with electrical tape or heat-shrink tubing.

3. Replace Oxygen Sensor

• Locate Bank 1 Sensor 1 oxygen sensor (usually found upstream in the exhaust manifold).
• Use an oxygen sensor socket to unscrew the old sensor from its mounting position.
• Apply anti-seize compound to the threads of the new sensor to prevent seizing.
• Install the new oxygen sensor by threading it in by hand, then tighten it with the socket to the manufacturer’s specified torque (typically around 30-40 lb-ft).
• Reconnect the wiring harness securely to the new sensor.

4. Clear Error Codes

• Reconnect the vehicle battery.
• Use the OBD-II scanner to clear the P0131 error code from the vehicle’s computer.
• Start the engine and let it idle for a few minutes.

5. Final Inspection

• Recheck wiring and connections to ensure everything is secure.
• Reinstall any covers or shields that were removed during the repair.