95 850T Various Codes

[ARaderer]

This car has been quite a pain this summer and it just popped up with another round of issues. I had a gas leak a few weeks ago that i thought was fixed when they replaced the fuel pump. Turns out the leak is still there.

Additionally, my transmission has started shifting pretty hard and is throwing code 323, Lock up slips or is not engaged. What might the issue be here?

Also I am getting a 241 in the A2 socket, EGR system flow malfunction. Does this have anything to do with the K&N Filter that i installed 2 years ago?

Also, from A7, I am getting 122 and 113. Temp sensor interval too long and Fuel gauge open circuit. What do these mean and could they have occurred when the shop installed the new fuel pump?

How much will this round cost me?

Thanks in Advance