I've tried to write my tune to the car through Mpvi2 and having trouble Calibrating and writing. Just at the end of the flash I get a Failed
Controller Unlocker X35 Invalid Key?
I think this could happen after ignition off the car in the middle of write process by mistake.
I might brick the ECU as the car. is restarting ECU would solve the problem????
Any help would be appreciated. Cheers