faint creaking/rattling sounds could be blend door(electric) or a vents vacuum valve moving, but nothing to do with the code
Bank 1 is passenger side of engine
Bank 2 is Drivers side
Sensor 1 is the O2 sensor closest to the engine, so on a V6 or V8 there are TWO sensor 1's, Sensor 1's are also referred to as "Upstream" O2 sensors
Sensor 2 is the O2 sensor behind the Cat Converter, if there is a "Y" pipe and a single exhaust then there is only One sensor 2
If there is a Dual Exhaust the there would be TWO sensor 2's
Sensor 2's are referred to as "Downstream" O2 sensors
Code P0153 O2 Circuit Slow Response (Bank 2, Sensor 1)
This means Drivers side Upstream O2 sensor is sluggish
Could be a wiring problem
When engine is cold remove the plugin for this sensor and make sure connections are clean.
Check the wires for signs of burns, they are near the exhaust pipes
Also an exhaust leak at the exhaust manifold on that side can suck in air, making sensor slow to react.
And it could be O2 sensor is just going bad, they are usually good for 150k, Ford recommends changing at 100k