Kouki 5 speed swap throwing codes

[Almosttt]

Okay so I swapped my 98' 240 to 5 speed about six months ago, at the time it was throwing these codes since it had a 96' ECU in it:

P0705 - Park Neutral Position switch
P0446 - Evaporative emission control system vent control circuit fault
P0335 - Crankshaft position sensor
P0325 - Knock sensor circuit malfunction
P0136 - Heated oxygen sensor - bank 1 sensor 2 circuit fault
-P2271 - Secondary heated oxygen sensor - bank 1 sensor 2 stuck rich
-P2270 - Secondary heated oxygen sensor - bank 1 sensor 2 stuck lean

(last two are under P0136)

Now I just put a 97' manual ECU in it and it is down to these codes:

P0325 Knock Sensor circuit bank 1 or single cylinder
P0335 Crankshaft position sensor circuit
P0141 Heated oxygen sensor - bank 1 sensor 2 heater circuit malfunction

Where should I start?? I know the crankshaft sensor codes is there because I have an s13 tranny in my car so it is missing that. I've heard I can just plug one in and zip tie it somewhere under the car though, is that true?

But as for the others... it wasn't throwing any of those before the swap.

Help please? I have to pass emissions in 10 days...