Need Help Code intermittently comes up, something to do with o2 sensors.

[Kiwidude]

My R18 classic converted to a Rogue motorcyles bobber has recently had a custom full system exhaust put on. O2 sensors transferred over etc, servo's removed under bike and servo dummies put in, the servo's were removed and dummies put in a while back when it had the pro race slip ons on it.. Sounds awesome and runs sweet. Every 4 or 5 rides I go out on it the check engine light comes on, I put my Hex GS-911 on it and its a plausibility of the LSU, minimum error... have attached screenshot of it.. now that is something to do with the o2 sensors.. we checked them out to make sure they were tight and seated properly, all good...I can go for a long ride, over 100kms, no code, but it seems to pop up when warm after a number of rides.. I have noticed no consistency when this happens, its happened under acceleration hard, happened calmly going through the gears, so far when bike warmed up, otherwise runs great and the confusing part it only happens every now and then, thank god for the GS-911 so i can clear the code and get the check engine light to go off... any ideas from anyone or has anyone had something similar...

 

[Star-Lord]

Maybe just a faulty sensor or on edge of failing; perhaps, roll the sensors and see if the failure moves to the other exhaust side, following the suspect sensor?

 

[Rufus]

If it’s not the above I can only think all those mods have taken the engine emissions outside of its pre-determined limits, whatever they may be. The CanBus isn’t happy.

 

[Star-Lord]

My R18 classic converted to a Rogue motorcyles bobber has recently had a custom full system exhaust put on. O2 sensors transferred over etc, servo's removed under bike and servo dummies put in, the servo's were removed and dummies put in a while back when it had the pro race slip ons on it.. Sounds awesome and runs sweet. Every 4 or 5 rides I go out on it the check engine light comes on, I put my Hex GS-911 on it and its a plausibility of the LSU, minimum error... have attached screenshot of it.. now that is something to do with the o2 sensors.. we checked them out to make sure they were tight and seated properly, all good...I can go for a long ride, over 100kms, no code, but it seems to pop up when warm after a number of rides.. I have noticed no consistency when this happens, its happened under acceleration hard, happened calmly going through the gears, so far when bike warmed up, otherwise runs great and the confusing part it only happens every now and then, thank god for the GS-911 so i can clear the code and get the check engine light to go off... any ideas from anyone or has anyone had something similar...View attachment 15738

Just checking in.. any luck with understanding the failure?

 

[Noelpolar]

I would start with deleting all adaptions...... then.....

Check....
1. O2 Sensor... inc connector etc....
2. Air leak (ie vacumm side of things).... then exhaust.

Might as well swap the servo budies over and see if the fault moves....

I've not seen anything online about this..... most BMW engine code stuff online is auto based, and these codes don't seem to be mentioned in that world (I had a brief look).

Whilst this link isn't relevant specifically..... a read does show how weird things can get (buried in there is something about reseting adaptions) ... https://bimmerprofs.com/12c401-plausibility-signal-activity-low/