My check engine light came on in my 99 Nissan Maxima SE. I took it to Autozone and they read a code of P0135. The fault code on the machine said something to the effect of: Upstream Heated Sensor Heater circuit fault - Bank No. 1.
I came home and called a Nissan Dealer and they told me one of the O2 sensors was bad. They said it would be about $185 for the part and $85 in labor. Does anyone know which sensor this is and if I could replace it myself? I looked at oxygensensors.com and their parts are all in the $70-90 range for O2 sensors. I'd much rather pay that than $260, if I can.
Any advice?