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How to Replace an Oxygen Sensor on a 1998 Sienna

If the Check Engine light is on in your 1998 Toyota Sienna, the oxygen sensor may be the cause. The oxygen sensor reads the oxygen levels in the exhaust and reports those levels to your trucks computer. If the sensor is failing, you may notice a decrease in your fuel efficiency. If you suspect that your O2 sensor is bad, many auto parts stores will scan the computer to determine the cause of your Check Engine light.

Instructions

1

Raise the truck using a jack and place it on a set of jack stands. Make sure it is raised enough to comfortably work under it.

2

Locate the oxygen sensor on the exhaust pipe just beyond the catalytic converter, toward the back of the truck. The sensor protrudes from the pipe on the passenger side of the vehicle.

3

Disconnect the electrical connection on the sensor. The connector should pull straight out of the sensor.

4

Remove the nuts on either side of the sensor using a socket and ratchet. Set the nuts aside in a safe place.

5

Remove the sensor from the pipe by pulling it straight out. Remove the gasket if it does not come out with the sensor.

6

Insert a new gasket and then insert the sensor into the mounting space on the exhaust pipe. Secure the sensor with the two nuts and tighten them with a socket and ratchet.

7

Connect the electrical connection to the sensor. The connector will plug straight into the sensor.

8

Raise the truck with a jack and remove the jack stands. Lower the vehicle to the ground.

Posted by Unknown at 4:00 AM

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