my Honda Accord 8th Generation (2008-2012) has a light on the dashboard and a code P0133

Learn how to diagnose and fix P0133 oxygen sensor circuit issue in Honda Accord 2008-2012. Step-by-step guide with diagnostic procedures and repair instructions.

Solution

1. Preparation

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

2. Remove the Upstream Oxygen Sensor

• Locate the upstream oxygen sensor (usually found on the exhaust manifold or before the catalytic converter).
• Use a socket wrench to carefully unscrew the oxygen sensor from its mounting location.
• Disconnect the electrical connector from the sensor.

3. Inspect and Clean

• Visually inspect the old oxygen sensor for any physical damage or excessive carbon buildup.
• Clean the mounting area on the exhaust system to ensure a proper seal for the new sensor.

4. Install the New Oxygen Sensor

• Apply anti-seize compound to the threads of the new oxygen sensor (if not pre-coated).
• Screw the new sensor into the exhaust system by hand to avoid cross-threading, then tighten it with a torque wrench to the manufacturer's specified torque (typically around 30-40 ft-lbs).
• Reconnect the electrical connector securely.

5. Reconnect Battery and Test

• Reconnect the negative battery terminal.
• Start the engine and allow it to reach operating temperature.
• Check for any warning lights on the dashboard.