[Info@mad-us.com]

Originally Posted by FrozenBlueG82

I’ve cleared it a few times now but it comes back each time after about 5-10 miles.

Normally it wouldn’t bother me, but you can’t remote start with a CEL, which is annoying.

Have you read the code that doesn't sound like an emissions issue. You could have a broken or unplugged sensor.

It should take at least 40 miles and sometimes two drive cycles to get a cel .

[Dasky_spas]

So concensus is that the supplied single washer is enough to clear the o2 sensor in the mini cat?

[530bimmer]

Originally Posted by Dasky_spas

So concensus is that the supplied single washer is enough to clear the o2 sensor in the mini cat?

Def not enough, buy this

https://www.autozone.com/ignition-tu...009/730544_0_0

Im attaching a picture that shows the washer bigdaddies provides. In the picture the o2 sensor is hand threaded on not even slightly tight and I can feel the sensor hitting the honeycomb. after I bought the new spacer, the sensor did not touch.


Sidenote, the BDG minicat did not help. I still have a CEL light. I even tried pairing the miniact with the 90 degree spacer. I'm over it, will probably go back to stock cats.

Also I have no idea how people are clearing the lower pipe o2 sensor with just the minicat. The minicat extends the sensor out so far the I think its touching the trans(or whatever is in that spot). (second picture showing that)

[Info@mad-us.com]

Originally Posted by 530bimmer

Def not enough, buy this

https://www.autozone.com/ignition-tu...009/730544_0_0

Im attaching a picture that shows the washer bigdaddies provides. In the picture the o2 sensor is hand threaded on not even slightly tight and I can feel the sensor hitting the honeycomb. after I bought the new spacer, the sensor did not touch.


Sidenote, the BDG minicat did not help. I still have a CEL light. I even tried pairing the miniact with the 90 degree spacer. I'm over it, will probably go back to stock cats.

Also I have no idea how people are clearing the lower pipe o2 sensor with just the minicat. The minicat extends the sensor out so far the I think its touching the trans(or whatever is in that spot). (second picture showing that)

What code did you receive ?

[530bimmer]

Originally Posted by Info@mad-us.com

What code did you receive ?

P014A
P013E

[Info@mad-us.com]

Originally Posted by 530bimmer

P014A
P013E

The spacer is not allowing enough flow to the sensor for it to record data. Adding a 90 degree is making the situation worse.

[Hit_Apex]

Originally Posted by Info@mad-us.com

The spacer is not allowing enough flow to the sensor for it to record data. Adding a 90 degree is making the situation worse.

It crossed my mind when I saw the addition of Autozone spacers. I (and many others) have the mini-cats on straight DP and not a CEL in 4.8k miles. It's likely the sensor is in contact with the honeycomb - even when I used the extra washer provided, I never checked that close but hasn't been a problem. Please do not assume you have to solve for that small interference beyond the extra washer. Lastly, I do not recall any interference with trans - that must be due to the Autozone spacers.

No one has cracked the code on why some cars throw CEL and some don't. I am sure it is a wide mix of installation error - mini-cats in wrong position, wiring in wrong position - low cell race cats not playing nice with the solution selected (spacer only vs mini-cat) - or other yet to be identified variation. Full tune is the only fool-proof solution. Anecdotally, the large majority do not have an issue but there is no data to confirm.