BMW i8 Hybrid Error Messages, System Check Problems

Hey there! I have some experience working on hybrids. I drive a 2012 BMW i3, and my cousin owns a BMW i4. Last month, I had a similar issue with error messages popping up. Took it to my regular workshop, and they ran a full OBD2 diagnostic scan free of charge since I'm a regular customer. Turned out it was indeed related to the system readiness monitoring cycle. They cleared the codes and everything went back to normal. Could you share what specific error messages you're seeing? Also, have you noticed any changes in the car's performance or had any recent work done? This info would help me better understand if your situation matches what I experienced.

Thanks for sharing your experience! To add some context, my i8 has 24243 KM on the clock and was last serviced 3 months ago. The main error message I'm seeing is "Drivetrain malfunction" along with a yellow warning light. The car still drives, but feels a bit sluggish, especially when switching between electric and petrol modes. Haven't had any recent work done besides regular maintenance. You mentioned your diagnostic scan was related to system readiness, did they have to do any recalibration or was clearing the codes enough to fix it?

Hey again! Yes, I remember helping you with this issue. When I had that similar problem with my i8, clearing the codes alone wasn't actually enough, though initially, we thought it might be. After the first attempt of just clearing the codes, the warnings came back within a day or two. My workshop ended up having to do a full recalibration of the hybrid system, particularly focusing on the transition module between electric and petrol modes. The sluggish performance you're describing is exactly what I experienced, that hesitation when switching between power sources was really annoying. The full fix included recalibrating the power management system and updating some software. Cost me about 2 hours of labor, but it's been running smoothly for the past 8 months since then. Given your symptoms sound identical to what I dealt with, I'd recommend asking your workshop specifically about the hybrid system recalibration rather than just going for a simple code clear. Also, try to note down exactly when the sluggishness occurs, like if it's worse when the battery is at a certain level or during specific driving conditions. This really helped my mechanic pinpoint the issue faster. Let me know how it goes!

Thanks so much for the detailed response! That's really helpful, especially knowing that a simple code clear might not be enough. You've actually made me feel better about the whole situation since your symptoms were so similar to mine. I've been keeping notes about when the sluggishness occurs, and you're right, it's definitely worse when the battery is around 20% and the car needs to switch to petrol mode. I'll take it to my workshop tomorrow and specifically ask about the hybrid system recalibration and software updates you mentioned. The 2-hour labor time gives me a good idea of what to expect too. I really appreciate you sharing your experience in such detail, particularly about the transition module between electric and petrol modes. I'll update you once I get it sorted. Thanks again for taking the time to help out a fellow BMW hybrid owner!