Oil pressure sender?

[kiNGMak]

Ok so i am driving around... no problems.. other then the car is running some what rough after HG replacement.. i attribute to needing a new O2 sensor.. some new plugs and wires... well i turn off the car.. and OIL PRESSURE SENDER is on the display... anyone?

[Rigmaster]

check the connection of the oil pressure sender (on the side of the head, near the firewall, intake side). A new sensor is cheap (~$5) and you might want to grab a spare just in case.

I had the same problem on the wife's '91 535i after I reinstalled the head after a rebuild- but the sensor was leaking. The problem was- I forgot to remove the sensor from the head when I sent it to the machine shop- I think the sensor got damaged when the head was cleaned in the "hot tank", and it started leaking.

Bret.