What might cause frequent O2 sensor failures?

Quick335XI · 01-11-2022, 09:38 AM

I had to replace my O2 sensors about 5 months ago, now another one has gone bad and I'm getting ECu codes and open loop issues. What sort of things might cause this?

Quick335XI · 01-13-2022, 10:10 AM

Anyone?

feuer · 01-13-2022, 08:30 PM

Quote:

Originally Posted by Quick335XI

Anyone?

If you burning oil and coolant o2 won't last long. Also engine running rich. Damaged during installed or manufacturer defect too.

Mustafa.e92 · 01-13-2022, 08:58 PM

flame tune will cook them pretty quick

Quick335XI · 01-15-2022, 04:15 PM

Quote:

Originally Posted by feuer

If you burning oil and coolant o2 won't last long. Also engine running rich. Damaged during installed or manufacturer defect too.

Ok thanks. Motor is rebuilt so hopefully shouldn’t be burning coolant or oil lol. We’ve been tuning it though so maybe rich sometimes.

feuer · 01-15-2022, 10:02 PM

Quote:

Originally Posted by Quick335XI

Ok thanks. Motor is rebuilt so hopefully shouldn’t be burning coolant or oil lol. We’ve been tuning it though so maybe rich sometimes.

Are you adding coolant or oil? Did you rebuild the engine yourself?

Quick335XI · 01-19-2022, 09:48 AM

Quote:

Originally Posted by feuer

Are you adding coolant or oil? Did you rebuild the engine yourself?

It was rebuilt by a shop in town

I'm having to add oil periodically because one of the turbo lines as a small leak

I created a thread a while back about having to add a little coolant over the course of a year and was told that's typical

Thanks

feuer · 01-20-2022, 02:02 PM

Quote:

Originally Posted by Quick335XI

It was rebuilt by a shop in town

I'm having to add oil periodically because one of the turbo lines as a small leak

I created a thread a while back about having to add a little coolant over the course of a year and was told that's typical

Thanks

Then is probably fueling that is causing the problem.

01-11-2022, 09:38 AM	#1
Quick335XI First Lieutenant 105 Rep 315 Posts Drives: 2010 335xi Join Date: Dec 2017 Location: Dallas iTrader: (0)	What might cause frequent O2 sensor failures? I had to replace my O2 sensors about 5 months ago, now another one has gone bad and I'm getting ECu codes and open loop issues. What sort of things might cause this? __________________ 2010 335XI, Carillo Steel rods, JE pistons, Closed Deck, Stage 4 race heads, 6mt, Pure Stage 2 High Flows, B58 Coils, VRSF\|Vu Brothers (Ft Worth, TX)\|JSRTuning, https://youtube.com/channel/UC_kL3RvFSGv9QmTVt6787gg
	Appreciate 0 Tweet Quote

01-13-2022, 10:10 AM	#2
Quick335XI First Lieutenant 105 Rep 315 Posts Drives: 2010 335xi Join Date: Dec 2017 Location: Dallas iTrader: (0)	Anyone? __________________ 2010 335XI, Carillo Steel rods, JE pistons, Closed Deck, Stage 4 race heads, 6mt, Pure Stage 2 High Flows, B58 Coils, VRSF\|Vu Brothers (Ft Worth, TX)\|JSRTuning, https://youtube.com/channel/UC_kL3RvFSGv9QmTVt6787gg
	Appreciate 0 Quote

01-13-2022, 08:58 PM	#4
Mustafa.e92 Lieutenant 206 Rep 498 Posts Drives: 2009 bmw 335i Join Date: Feb 2020 Location: Canada iTrader: (0)	flame tune will cook them pretty quick
	Appreciate 1 feuer4275.50 Quote