Question about my check engine light codes

[DSM-Franek]

helloooo

i have a 6 bolt in a 2g with stock 2g 97 ecu and i can't get it "inspected" with the CEL on so i bought a obd2 scanner and this is what it says:

PO170 Fuel Trim Malfunction
PO136 o2 sensor circuit malfunction (Bank 1 sensor 2)
PO141 Downstream Ho2S Heater Failure (m/t)
P1400 Manifold Differential Pressure Sensor Circuit Malfunction

it says i have 8 codes but it just repeats the first 4 again like this

PO170 Fuel Trim Malfunction
PO136 o2 sensor circuit malfunction (Bank 1 sensor 2)
PO141 Downstream Ho2S Heater Failure (m/t)
P1400 Manifold Differential Pressure Sensor Circuit Malfunction
PO170 Fuel Trim Malfunction
PO136 o2 sensor circuit malfunction (Bank 1 sensor 2)
PO141 Downstream Ho2S Heater Failure (m/t)
P1400 Manifold Differential Pressure Sensor Circuit Malfunction

i know the P1400 is because i took my map sensor out but will be putting that back in, but as for the rest of the codes..

can the PO170 be tied into the o2 sensor being bad?

and do both of those o2 sensor codes just mean the sensor is bad? also which is it? when it says sensor 2 im guessing its the one furthest from the turbo?

and for the PO170 my fuel mods are walbro 255 rewired, 660s, afpr set at 45psi with the vacuum line off if that info is needed

any help would be greatly appretiated

Frank

 

[DSM-Franek]

Alright, well i've been reading up on this PO170 and it seems that exhaust leaks can cause it too..

Wellllll I have 1 bolt broken off in my turbine housing and 1 or 2 broken off in my o2 housing, That means 3 bolts are holding on my turbo to the exhaust manifold and 3 or 4 are holding on my o2 housing..

AND my exhaust manifold has a about an inch and a half hairline crack on the top

With that said.. I think this may also be playing a BIG part in my PO170

Opinions?

Thanks Alot!
-Frank