Toyota Repair: tacoma 2002, oxygen sensor, air sensor

Question
check engine light on. comes up P1135.fuel and air sensor I belive it said. Is it hard to replace and is it expensive? Where is it?
Thank You
Mike

Answer
Hard? No. It's on the exhaust manifold.
Expensive. Eh. Relatively no. Normally they go about $75-150 depending on what kind of sensor it is.
They tend to alst about 100,000-150,000 miles before they're reading poorly, or they're just useless.

All you really need is an oxygen sensor socket.