CT200h Gear Shift Indicator Failure

Wow, that sounds frustrating! I've got a CT200h too, and while I haven't experienced the exact same issues, I did have some weirdness with the gear shift a while back. The gear indicator would flicker and sometimes show the wrong gear. Did you check the shift knob itself? Sometimes those can get loose or have some kind of electronic issue since they're connected to the system. Also, is the check engine light on?

The check engine light is illuminated. Regarding the shift knob, can you elaborate on the 'electronic issue' you mentioned? I'm trying to determine the scope of potential faults before seeking professional diagnostics.

Sure thing. What I meant by 'electronic issue' is that the shift knob isn't just a mechanical lever anymore. It's connected to sensors and a control unit that communicates with the transmission. If there's a problem with the wiring, a sensor, or even the control unit itself, it could cause the symptoms you're seeing. Given the number of issues you're experiencing, and that the light is on, it really does sound like a defective control unit. Honestly, with all those symptoms popping up at once, and especially with the error codes stored, my advice would be to take it to a reputable shop. It sounds like you're going to need someone with the right diagnostic tools.

I appreciate the detailed information. Your assessment aligns with my preliminary diagnostics. The affected control unit is indeed defective. I have scheduled a repair, the estimated cost is 1000€.