"Fault in the engine control" caused by aftermarket slip-on exhaust?

[CanadianRS]

Hi, I have a 2020 R1250RS and I was changing the enormous factory chrome exhaust to a new slip on. My bike has always ran perfect. Started it to record the original exhaust note, shut it off, removed the exhaust and started it for a second with no exhaust can to hear how loud it was. Recorded that too. Then installed the new slip on and very quickly got a message on me TFT saying "Fault in the engine control. Onward journey possible. Ride carefully to next specialist workshop."

 

Do you think the difference in back pressure from stock, to nothing, to aftermarket caused the error? I only have 7,000 km on my bike. Issue for me right now is that it's winter and snowing and my dealer is over an hour away. 

 

I'm hoping it's nothing and will just clear itself after enough ignition cycles or being ridden, but this is my first BMW so not sure.

 

Any thoughts appreciated.

[TSConver]

It has no idea on exhaust back pressure.  It measures O2 pre and post cat.  Without the can it could be getting significant reversion and seeing O2 pulled back into the open header.  The reversion would likely make the downstream O2 sensor read wrong and make the computer think the catalyst was not performing correctly. That downstream O2 is real close to the can connection.  Probably need to have it reset.

[CanadianRS]

12 minutes ago, TSConver said:

It has no idea on exhaust back pressure.  It measures O2 pre and post cat.  Without the can it could be getting significant reversion and seeing O2 pulled back into the open header.  That downstream O2 is real close to the can connection.  Probably need to have it reset.

Thank you. I've also just learned about Motoscan so I ordered an OBDLink LX to try that out tomorrow. If I reset the light and it doesn't come back on then I'm gold. If it does, well that's a trip to the dealer that should be covered under my warranty. 

[Hati]

You can always fit the original exhaust back and see if the message goes away.

[scout6]

Disconnect the battery to do a reset, then run with the new exhaust to see what the computer sees.