Hi, I had same issue with cc on my 2021 890 Duke with same fault description you have. It turned out to be a bad front brake switch, I believe its part number is 63711051000.

One way to test it is to compare the brake light activation when using the rear brake to the front brake. The brake light did not always turn on distinctly, but instead like a dimmer when using the front brake lever, but was very distinct when using the rear brake.

 

I have the same issue with cruise control. My 890R Duke is now one year old and has 5200 km on the clock. From day one the c c worked intermittently. Some times it does not even come on. Lately it will activate and display orange on the screen but does not activate (go green). I have an appointment with the dealer for next week but as from yesterday the c c is working again. This is very problematic as the dealer says it must be non-operational for him to check it out.....

 

I have the same problem on my 2023 890 Adventure.
Did the dealer find fix the problem? If yes, what was the cause?

 

The issue was seemingly resolved. The rear brake sensor (sitting under the tank) was replaced. For the past few rides now cruise control worked as intended. This is as I understand a common issue with the 890's... Hope this helps. Regards.

 

Seems my Cruise Control issue is back... Twice it did not want to set. Dealer could not pick up any fault in data retrieved from bike. Seriously thinking of selling as the horror stories of cam issues escalate too....

 

Same here with my 2022 890 Duke. Cruise functionality was sketchy since taking delivery. Now with 7,000 miles it exhibited the "will not set" issue many others have experienced. Previously it was intermittent but now nothing. I replaced both brake sensors/switches with OEM switches and problem resolved. I bought two of the Tusk switches but they are a different size (i.e., longer) so I didn't try to use them. Several others stated they tried the Tusk switches but they did not work.
PRO TIP: You DO NOT have to fully remove the tank to access the sensors. Remove the two bolts securing it to the frame and you have plenty of room to lift the rear of the tank up a bit and rotate to the left to gain access. Bad things happen when you disconnect electrical connections and fuel lines.

 

Hi, thanks for your post. Do you know if ill have to flush the brake lines to change this sensor? Or can i possibly just switch it out quickly, letting only a bit of brake fluid out? So just top it off after.