My check engine light came on yesterday and the code says its the Bank 1 o2 sensor.. can anyone tell me the location of this thing?

 

Which one. You have a upstream and downstream O2 sensor. One is before the cat and one is after the cat.

The code will read "Bank one Sensor 1 or 2". Sensor 1 is before the cat and sensor 2 is after the cat.

Re'

 

They are both located under the vehicle after the "Y" coming from the echaust manifolds. One is before the cat and one is after. This is unlike most vehicles that have the primary in the exhaust manifold(s).