2000 a4 1.8t atw

Ok, so the other day, after a little spirited driving, my fuel gauge and speedo started going all sorts of crazy. I'll post a link to a video. CEL cane on and everything. When I scanned it, came up with 9 fault codes. Lemme list them.
P0130- b1 s1 malfunction in circuit intermittent
P1113- b1 s1 internal resistance too high
P0106- manifold/ barometric pressure sensor (map) implausible signal
P0507- idle control system /higher than expected
P0501- vehicle speed sensor implausible signal

I cleaned the map sensor and I think that code went away. Car runs better. Shifts aren't as hard when I let off to clutch. I checked the 02 sensor with vagcom and with a Mac scan tool and everything checked out. Being that I have a soaked floor after every rain storm, coming from where I ran the boost gauge line, (parallel to the hood latch cable) I have a leak and now I'm suspecting a bad ground or a fried relay. Can anyone point me in the right direction? Relay for the cluster? 02 sensors? Etc? I gotta locate all of fthese grounds too.

 

Cel just came back. I'll scan it again tonight and find out which codes came back

 

So are you thinking that the water getting into the car is shorting something out? If you thinks thats whats causing is totally fix that problem first.