Fix It

Trying to work with an O2 sensor without the proper tools may result in a myriad of problems. An oxygen sensor plays an important role as it measures the amount of oxygen in both the gas or liquid that the sensor is analyzing. Should a problem arise with the O2 sensor and it needs to be repaired or replaced, the importance of having the appropriate O2 sensor tools on hand increases significantly.

Oxygen Sensor Wrench

Reaching an oxygen sensor is often a challenge as it is generally located in a hard-to-reach space. The oxygen sensor wrench was created for just this purpose, as it is capable of replacing and installing new oxygen sensors, or simply giving the oxygen sensor a "checkup." Oxygen sensors wrenches are generally 22 mm, and vary in style based on what tool is needed for a particular O2 sensor (such as rusty or overheated sensors).

Oxygen Sensor Tester

The oxygen sensor tester tool measures the response time of the O2 sensor. If the O2 sensor, when tested, is unable to move from under 175mV to over 800mV in under 100mS upon snapping the throttle, then the test is failed, indicating the need for a new O2 sensor.

Oxygen Sensor Socket

The oxygen sensor socket tool is specifically designed to assist in removing the O2 sensor from the exhaust manifold. Alternatively, a 22-mm socket may be used if you are unable to acquire an oxygen sensor socket. The socket is placed over the O2 sensor and turned clockwise to loosen it, with heat (via letting the car warm for five minutes) and oil applied if you are unable to loosen it.

The oxygen sensor is an integral part of your Dakotas emissions system. It monitors the amount of oxygen in the exhaust. When an O2 sensor fails, your Dakota may hesitate or your fuel mileage may noticeably decrease. If your Check Engine light comes on, the O2 sensor may be to blame. Most auto parts stores will scan the computer for you to determine the problem at no cost. Purchase replacement sensors from an auto parts store or Dodge dealership.

Instructions

1

Lift your Dakota using a jack. Secure the truck on a set of jack stands so that you can comfortably work under it.

2

Locate the downstream oxygen sensor on the pipe behind the catalytic converter, running beside the frame rail. Disconnect the wiring from the sensor by pulling it straight out of the connector. Remove the O2 sensor using an oxygen sensor socket and a ratchet.

3

Install the replacement sensor with the oxygen sensor socket and the ratchet, turning it clockwise until it is secure. Torque the sensor to 22 foot-pounds with a torque wrench. Connect the wiring harness to the sensor by plugging it into the connection on the sensor.

4

Locate the upstream O2 sensors on either side of the transmission oil pan. There is an exhaust pipe running on each side of the pan with sensors in each one. Disconnect the wiring harness from each of the sensors then remove the sensors with the oxygen sensor socket and ratchet.

5

Install the new sensors in each location using the oxygen sensor ratchet. Torque the sensors to 22 foot-pounds with a torque wrench. Attach the wiring harness to the sensors by plugging them straight into the connections on the sensors.

6

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

When the oxygen sensors in your 1997 RAV4 fail, you will find yourself paying significantly more at the fuel pumps until you replace it. The sensor regulates the engines fuel consumption based on the oxygen density of the exhaust. For the most cost-effective repair method, purchase replacement oxygen sensors from an auto-parts store. Change them at home for the cost of parts, saving the labor expense of a service center.

Instructions

1

Raise the RAV4 with a jack and insert a set of jack stands beneath the truck. Remove the jack when the jack stands are secure.

2

Pull the electrical connection apart to disconnect it from the top of the sensor. The sensors are threaded into the exhaust system on either side of the catalytic converter.

3

Remove the sensor with a ratchet equipped with an oxygen sensor socket. Install the new sensor by hand to avoid cross threading, which can damage the sensor and the mounting area. Press the electrical connection into place.

4

Repeat the process for the second sensor if needed. Raise the car with a jack to remove the jack stands. Return the RAV4 to the ground.