BMW 3-Series and 4-Series Forum (F30 / F32) | F30POST - View Single Post - Lean/Oxygen sensor trouble shooting (F-series N55)

Wires · 12-21-2016, 08:15 PM

I forgot to mention if you had a rich misfire, it will show up lean on the logs as well. Raw fuel in the exhaust is high in oxygen and can give a false positive lean reading.

12-21-2016, 08:15 PM	#8
Wires Brigadier General 1646 Rep 4,877 Posts Drives: 2016 340i xDrive Join Date: Apr 2008 Location: Calgary iTrader: (0)	I forgot to mention if you had a rich misfire, it will show up lean on the logs as well. Raw fuel in the exhaust is high in oxygen and can give a false positive lean reading.
	Appreciate 0 Quote