Similar Problem Almost Caused Me to Go Off Bridge
I have a 2010 Aud/Conv package and have had it for 3 months now, only 500 miles and about 8 rides (am disabled). My bike went into Limp Mode the first week I had it and they said it was a brake sensor fault.
Well, I was riding the other night and preparing to exit onto a very high ramp. I had a car right on my tail, followed by many others and was travelling at 69 mph. The bike suddenly went into Limp Mode, which slowed the bike instantly to 40 mph and then 45 mph. The cars behind me were screaching their tires and I almost got rear-ended off a 200' bridge in a corner. Then the Check Engine light came on, followed by the VSS light. I pulled over immediatley, as you can imagine and I turned the bike off for about 5 minutes. I restarted, Limp Mode was gone, VSS was gone, but DPS was on now. So, I made it home, started the bike about 5 hours later and no warning lights at all.
I didn't swerve abruptly, no potholes and was just going straight. So, my record for Limp Mode is about a 25% of the time occurence to date ! The dealer has no idea, but is going to install the software again and apply all the patches and recalls to date. But, you can lose your life over this Limp Mode problem as I almost did. It scared the bejesus out of me and I have been riding bikes for over 35 years.
Tom