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'08 E93, replaced O2 sensor, bank 2 sensor 1. I Cleared that P0050 code and 3 weeks later a new code appears....P112d. Possible "error with O2 sensor (new Bosch), harness open or shorted and( lastly) poor circuit electrical connection." Can I schmear some dialectic grease in the O2 sensor connection to the harness plug? Or could I spray both ends with electrical contact spritz?
Possible bad fuse also?
Can I tighten the connection with a zip tie?
I know I am rambling but perhaps someone out there had the same error code and found a fix.
Pls help if y'all can.
Thanx,
Mikey
 

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Take the connection apart and examine the contacts for corrosion. Chances are that the pins or socket contacts need a cleaning or a slight tweak to make a good contact. A glass brush is good for cleaning corrosion from male contacts and a dental pick is good for slightly bending female contact. WD40 will keep things dry and clean.
 
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