N55 stuck in Open Loop Fueling

controllerplus · 10-28-2019, 07:05 PM

Ran into an issue 3 months back where we randomly got multiple faults on the lambda bank 1 o2 causing it to have no afr or fuel trim readings. Replaced that. Didnt fix it. Got another new O2, replaced that and the tmap ground wire.

Worked great!

Now we're stuck in open loop fueling again with an O2 heater fault code. No other codes present. Does anyone know what this could be? F series so there is no fuse for the o2.

Thanks.

weehe126 · 10-28-2019, 09:19 PM

How did the sensors look that you took out? Burning oil?

controllerplus · 10-28-2019, 10:09 PM

Quote:

Originally Posted by weehe126

How did the sensors look that you took out? Burning oil?

the original one was white. Not burning any oil at this time.

weehe126 · 10-28-2019, 10:31 PM

Are you running a tune?

controllerplus · 10-29-2019, 03:05 AM

Quote:

Originally Posted by weehe126

Are you running a tune?

wedge performance 100% e85

weehe126 · 10-29-2019, 08:05 AM

Have you asked him to look into it? Tried going back to stock tune and see if it still does it?

10-28-2019, 07:05 PM	#1
controllerplus Private First Class 13 Rep 105 Posts Drives: e46 m3 Join Date: May 2016 Location: St. Louis iTrader: (0)	N55 stuck in Open Loop Fueling Ran into an issue 3 months back where we randomly got multiple faults on the lambda bank 1 o2 causing it to have no afr or fuel trim readings. Replaced that. Didnt fix it. Got another new O2, replaced that and the tmap ground wire. Worked great! Now we're stuck in open loop fueling again with an O2 heater fault code. No other codes present. Does anyone know what this could be? F series so there is no fuse for the o2. Thanks.
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10-28-2019, 09:19 PM	#2
weehe126 Brigadier General 1161 Rep 3,189 Posts Drives: 2017 340i Join Date: Apr 2014 Location: San Antonio iTrader: (2)	How did the sensors look that you took out? Burning oil?
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10-28-2019, 10:31 PM	#4
weehe126 Brigadier General 1161 Rep 3,189 Posts Drives: 2017 340i Join Date: Apr 2014 Location: San Antonio iTrader: (2)	Are you running a tune?
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10-29-2019, 08:05 AM	#6
weehe126 Brigadier General 1161 Rep 3,189 Posts Drives: 2017 340i Join Date: Apr 2014 Location: San Antonio iTrader: (2)	Have you asked him to look into it? Tried going back to stock tune and see if it still does it?
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