i you have KPro can u by-pass the o2 sensor?

 

you can turn off the secondary O2, I think that disables OBDII and you can also disable the primary O2 which makes the engine run in open loop.

Open loop isnt exactly a good idea unless you are in a race only environment and its necessary to do so.

 

my friend doesn't have KPro and he has a k swap on he's eg, he needs the both sensors or just the primary like u said. is there any other way that u could run the motor without the primary. or u still need kpro.
can he just disconect something?

 

the primary sensor is the one that the ECU reads in closed loop operation for adjusting air fuel. if the ECU does not detect the primary sensor response, it will throw a CEL.

why don't you want to run a primary sensor? doesn't make sense