how to fix the P0133 code on my Toyota Corolla E140 (2006-2013)

Learn how to diagnose and fix P0133 oxygen sensor issue in Toyota Corolla E140. Step-by-step guide with diagnostic procedures and repair instructions.

Solution

1. Preparation

• Gather tools and parts needed for the repair.
• Disconnect the battery to ensure safety while working on electrical components.
• Tools Required: OBD-II scanner, multimeter, socket set, torque wrench.

2. Inspect and Replace Oxygen Sensor

1. Locate the Oxygen Sensor

   • Find the upstream oxygen sensor (Bank 1 Sensor 1) on the exhaust manifold or near the catalytic converter.

2. Disconnect Electrical Connector

   • Unplug the electrical connector from the oxygen sensor by pressing the release tab and pulling it apart.

3. Remove the Oxygen Sensor

   • Use a socket or wrench to loosen and remove the sensor from the exhaust pipe. Take care not to damage the threads.

4. Install New Oxygen Sensor

   • Apply anti-seize compound to the threads of the new oxygen sensor (if not pre-applied).
   • Screw in the new oxygen sensor by hand to avoid cross-threading, then tighten it with a wrench to the manufacturer's specified torque (typically around 30 ft-lbs, check service manual for exact specification).

5. Reconnect Electrical Connector

   • Plug the electrical connector back into the new oxygen sensor until it clicks into place.

3. Reconnect Battery and Clear Codes

1. Reconnect the Battery

   • Reconnect the negative terminal of the battery.

2. Clear the Diagnostic Codes

   • Use the OBD-II scanner to erase the P0133 code from the vehicle’s computer.