I have a problem with my car, a Golf 5 GTI 2.0 TFSI fitted with a MED9.1. I've always read and written safely, initially with powergate and then with mpps v5. A few days ago I connect mpps and I to read it: error "invalid key". Since the same mpps in the evening before I had blocked a edc16u31 (then recovery in recovery always with mpps), I think either the cable is defective and I buy a rooster v48. I plug in the cock, I start reading and.... error sk2, silentkey reading... it seems the same error of the mpps. At this point, I think that the problem is not the interface, but my ecu. What is pu? be successful according to you? C'? the way to resolve it? Of course I didn't trust to write......