Need help Newbie with B6 3.0 v6
 

Hello I just bought a used 04 a4 quattro 3.0 v6. 6spd. I paid 2800 dollars. It does have few issues I scanned car got code p0030 see image. I bought the 02 sensor. However I don't know which one it is. Also I got code for vehicle speed sensor. So I bought that one as well. I found one it is located on the transmission .
Lastly the oil dipstick was broken, PO gave me a new one but not sure how to pull out broken piece?
also the sensor with the green plug is what? where does it go?
AC blows hot or does not work, i bought a re charge kit but when i connect the hose and start filling it saids it is full. the OM said if coolant level is low or high temp AC would not run? i checked coolant level it is between low and high mark, the car temp is solid in middle of gauge always
Please help me out.
Thank you

Anyone?

The sensor is a water temp sensor. It is held into place with a plastic clip that usually breaks when you try to remove it. Get another clip before attempting to replace it.

The code for the O2 sensor will indicate which one. Bank 1 is the passenger side, Bank 2 is the driver's side. P0030 indicates Bank 1 sensor 1. So this is the upstream sensor that will be located up near the exhaust manifold. This code indicates the heater circuit in the sensor isn't working but it should still run fine.

Getting the broken dipstick out is going to be fun. If you can still see the end of it, you might be able to grab the end with some small needle nose pliers and work it out.

Not sure what the AC issue is.. yet.