I have a question about a problem encountered on my car (Audi A3 2004, 2.0TDI automatic sportback).
I noticed my GSG-DSG 0623 gearbox behaving very oddly, like it does not know when to change gears, especially from 3rd gear on.
Putting the tester on it, I've read two codes, P0606 and P0716. P0606 it says that my PCM unit is defective, and the P0716 says that the Input Speed Sensor (G182) is faulty, with the message: Implausible signal.
Now, I'm almost sure the both the PCM and the sensor are working just fine, so I suspect that the gearbox is the main cause (maybe the clutches are slipping), so it sends an out-of-range value to the sensor, which in turn sends an out-of-range value to the PCM, thus causing the error codes.
Does this makes sense to you? How can I test the sensor to make sure it's working correctly? I don't want to just change the components, when the real cause might be somewhere else.
Thank you very much!