Where are the 02 sensors on a 2006 Cadillac dts?

On a 2006 Cadillac DTS, the O2 sensors are located in two main areas: upstream (pre-catalytic converter) and downstream (post-catalytic converter). The upstream O2 sensors are positioned on the exhaust manifold, while the downstream sensors are located on the exhaust pipe after the catalytic converter. Typically, there are a total of four O2 sensors—two for each bank of the engine.