Hello, I'm new to the forums! I just bought a 1996 850 turbo a month ago, and have been working on fixing her up, long story short I ran the check engine codes and 3 came up, first was
p0135 02 heater circuit (bank 1 sensor 1)
then
p0130 02 circuit ( bank 1 sensor 1)
then finally :/
p0137 02 circuit low voltage (bank 1 sensor 2)

So what are the odds I would get two faulty 02 sensors at the same time? Or is there some other problem causing both of these? I want to do a visual inspection but I'm down with a bad cold and don't feel like leaving the bed. I'm thinking it might be a vaccum leak, there is this weird plug like thing that goes into the passagner side of the intake manifold that has a line going to it. one time during heavy use, it shot out and I lost all compression and the car wouldn't start. once I pushed it back in the car runs fine, is it possible that this weird plug in the intake manifold is causing the codes? any help and any ideas in what this weird plug is what would very helpful

 

Just to clarify , its not the line that come out of the intake manifold, but the weird plug its self

 

post a picture of the plug thing when you can

 

 

Its too dark to take the photo, but this is from google. the plug like thing where the hose connects can pop out if I floor hard.

 

Any idea?

 

Im not familiar, sorry.

 

I have seen that happen before. That is part of the intake manifold, when out, it is a massive intake manifold leak and yes, a car will not start or run with an intake manifold leak that large. If that were to happen to me, I would replace it. Turbo cars simply apply to much pressure to the intake system to have that plug flying out again, leaving me limp on the side of the road. Junk yards are full of them.

As for your O2 sensor codes, my guess is that the sensor are old or after market and should be replaced. There is also a chance that the cat is going bad, hopefully just the sensors.