how to fix P0133 code in Honda Accord 10th Generation (2018-2022)

Learn how to diagnose and fix P0133 code related to the upstream oxygen sensor in Honda Accord 10th Generation. Step-by-step guide included.

Solution

1. Preparation

• Gather necessary tools and equipment.
• 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 and Replace O2 Sensor

1. Locate the Upstream O2 Sensor:

   • The upstream O2 sensor is typically located in the exhaust manifold or just after it.

2. Remove the O2 Sensor:

   • Use an O2 sensor socket or a wrench to carefully unscrew the O2 sensor from its mounting location.
   • Be cautious of excessive force as this can damage the sensor or exhaust threads.

3. Install the New O2 Sensor:

   • Apply anti-seize compound to the threads of the new O2 sensor (if not pre-coated).
   • Screw the new O2 sensor into place by hand to avoid cross-threading, then tighten it to the manufacturer's specifications (usually about 30-40 ft-lbs).

4. Reconnect the Wiring Harness:

   • Ensure the connector is clean and securely attached to the new O2 sensor.

3. Clear Codes and Reconnect Battery

1. Reconnect the Negative Battery Terminal:

   • Ensure all tools are removed from the engine bay before reconnecting.

2. Clear the Engine Codes:

   • Use the OBD-II scanner to clear any existing trouble codes from the vehicle's computer.

4. Test Drive

• Take the vehicle for a test drive under various conditions to monitor performance and ensure the check engine light does not reappear.