Drivetrain Malfunction

[dfdureiko]

Most of the time I drive within or close to electric range. Every now and then do a longer trip….last week drove 200mile R/T from Brooksville to Sanford to pick up an '04 Jag Vanden Plas….or like tomorrow I'm driving to St Pete….when the battery gets to less than 75% I turn on the range extender. As you know driving 75mph at times requires both the REX and the battery. Every time I do this towards the end of the trip I get a warning "Drivetrain Malfunction" get home, after a day it goes away and all is normal.
any ideas? even after the warning comes on the car drives normally, but still stressful!
Dan

 

[mindmachine]

It happened to my 2014 i3 twice before it was out of warranty and the dealer never and record of it because it was gone by the time I got it to the dealer. Then when ti was 9 months out of warranty it came on again and stayed on, i took it to the dealer and after having the car a day looking for the problem they called me and said it was a heat exchanger of some sort and the cost was estimated at $2800 to replace it. I only had 9650 miles on the car and I complained about the failure and the dealer got BMW to pay for it.