P0134 – O2 Sensor Circuit No Activity Detected Sensor 1 Bank 1: The front heated oxygen sensor (or O2 sensor 1) is placed into the exhaust manifold. It detects the amount of oxygen in the exhaust gas ...

I drive an '04 Toyota Matrix which has remained in pretty good condition even thought I drive the hell out of it. I've already put almost 43k on it, but I suppose it could be worse. The only problem I ...