Thought the following may be of interest.
Whilst on a recent trip experienced DTC Failure manifested by a loss of power in a sharp, 1st gear, 180 degree turn, up a steep hill, two up and loaded with full luggage. Not an experience I'd care to repeat. The loss of power very nearly caused a low speed tip over as I powered out of the turn only saved, more by instinct than skill, by slipping the clutch revving her up and powering away.
Initially I thought the engine itself had developed a fault but once stopped noticed the DTC light on the dash was flashing rapidly. Tried pulling away uphill on a straight away, same problem. Reduced power as if the engine had developed a fault and was not pulling. Switched the ignition off for a couple of minutes thinking this may reset the problem, no joy. Then remembered that the DTC is switchable. Went into the menu and selected it off. Problem solved, road the bike for 2,500kms all the way home from UK to Austria. The only subsequent issue was that the Cruise Control was unreliable especially at lower speeds.
Once home took her to the dealer who put the bike on the diagnostics......no fault registered. The DTC light was still flashing rapidly, they took her for a test run and confirmed the problem. After consultation with BMW a new Yaw Sensor was ordered along with front and rear Speed Sensors as a back up should the replacement Yaw Sensor not fix the problem. I'm told the Yaw Sensor costs $700, thank god I took a 5 year service/parts and labour package when I bought the bike 12 months ago. Anyway after a couple of days the parts duly arrived. The new Yaw Sensor fixed the problem.
The GTL was also given a 10,000kms service, new Air Filter, Transmission Oil, Engine Oil and Filter ete etc. Cost $0 thanks to the service package once again. The package cost me about $1,800 but boy Oh boy is it worth it. So far the dealer (EuroMotors Graz Austria, great guys pro-active, proffesional and friendly, nothing is too much trouble) have serviced the bike and replaced numerous parts cost $0. The GTL is 12 months old with 24,000kms (about 15000 miles) on her.
Am off on a 15,000km trip to Norway in 4 days, can't wait. Hopefully the bike will do its customary magic and keep that ear to ear
going all the way.