Started as intermittent fault, no start/no crank/ key not recognised code 13. Now total failure. Change Transponder ring, fitted good ECU no change. Skilled engineer has tried to communicate with three scanners and computer cannot communicate with ECU. Any one experienced this problem. Engineer seems to think it may be a defective or failing part controlled by the ECU effecting it's working.
Any idea's chaps
Thanks
Mick