My e34 runs fine, then warms up and dies out

[quote=“Coldaccord”"]

I have a 92 525i, 2.5 m50 non vanos, 5 sp.

My e34 runs fine for a couple minutes, then starts running like shit and won’t move. Thought it may be a clogged cat so I pulled the exhaust off, it’s running open header right now. Put a scanner on it; no problems, even though once it starts running like shit it throws a cel. It said it’s getting 1.12v at the o2 sensor, but the o2 sensor isn’t on there.any ideas?

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what is the actual text of the trouble code? That car has the 20-pin diagnostic socket, right?