Safety Warning

DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.

2009 Toyota Matrix Base, StandardFACTORY OEM SERVICE PROCEDURE

Heated Oxygen Sensor: Removal

REMOVE HEATED OXYGEN SENSOR
1. Disconnect the heated oxygen sensor connector.
2. Remove the grommet and pull the sensor connector out of the cabin through the floor panel.
3. Remove the wire harness clamp bracket and disconnect the wire harness clamp.
  
  Fig 1: Locating Wire Harness Clamp
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
4. Using SST, remove the heated oxygen sensor.
  SST 09224-00010
  
  Fig 2: Removing Heated Oxygen Sensor
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

• You smell fuel, burning insulation, or see smoke.
• Brakes feel soft, pull hard to one side, or make grinding noises.
• The engine overheats, stalls repeatedly, or misfires under load.
• You are missing required tools, torque specs, or safe lifting equipment.
• You are not confident in the next step or safety outcome.