hi all I have an a problem with the car when I turn the ignition key it does a dial sweep then you here a bong and the traction control light and the tyre pressure monitor light come on , the car will turn over but will not fire up and you have turn igninition on and off several times to clear and then car will start, its been it at skoda but they cant find whats causing it only saying it comes up with a communication error has anyone else come across this

 

cheers andy

Ecu relay? Wiring to the relay or ecu? ECU itself? 

Update to this post it turned out to be the main relay in the fuse box next to the batery it had corrosion on it I replaced it with a new one an car been fine now for over 8 weeks