On the C0 plug on the module to the right I been searching for hours of a diagram or list of which every wires role is. Would anyone happen to have a diagram? It's throwing me a b2961.

for leaks, but can't find one. It leaks when there's fluid in reservore, but not when empty.

For the past two days after I start my car the engine continues to rev with the rpm needle staying between the 2 and the 3. I turn the car off and try it again - the engine does the same thing. It will do this even if I put it in drive, move the car a little, and then put it back in park. Usually by the third time of turning it off and restarting it, the engine will idle fine. What could possibly be causing this and if it needs repair is it going to be expensive? Service engine soon light came on last night but did not come back on this morning.