How do you replace oxygen sensor on 2001 Toyota tundra?
Problems with the O2 sensor are individually identified by the trucks on-board computer. When there is a check engine light it indicates a code on the system that can be read by a scan gauge. (The code for a passenger side pre-converter sensor is PO 155 and the driver side is PO 135)The gauges are available at many retail outlets and cost around $75.00. If you choose not to purchase a gauge, Auto Zone or Advanced Auto Parts provide the service of reading and clearing the codes for free. They also have the sensors and wrenches. The pre-converter sensors on this Toyota are located just to the rear of the manifold on the top near the exhaust pipe attachment and are accessed from under the vehicle. They are difficult to see and reach requiring a special wrench to remove them. The after converter sensors are just to the rear of the catalytic converter on the exhaust pipe and are fairly accessible. Wrenches are available on-line and at some local auto parts stores. It is suggested that you t
