Hi. This is my first post here.

I have just experienced the issue by many who have no issues during warranty period then bang the problems start!!!

This time I have our Q7 immobilized with potential start authorisation ECU issues.

No central locking
No instrument lights showing on dash
Climate control lights up and so does MMC panel
Car will start for 1-2 and turn over but will fail and shutdown (immobilzer kicking in?)
The three keys I have have been tested and neither will start the car so issue not the key. Dealer tested one of the keys and said no faults found.

I had the car towed to AUDI dealership up the road and they have run the diagnostics to determine that the errors lead to J815. This appears to be the ignition coil however Audi are claiming that both it and the ECU need replacing?

Error messages from report as follows:

Error messages:
Errors: Infrastructure.Vehicle.ODS8003E
Text: ODS8003E Infrastructure.Vehicle (EcuCom): The operation on the control unit with the control address 0x00 was faulty. Error message:
Errors: Infrastructure.Vehicle.ODS8011E
Text: ODS8011E Infrastructure.Vehicle (EcuCom): Control unit with control address 0x42 is not installed or does not respond.
Errors: Infrastructure.Vehicle.ODS8011E
Text: ODS8011E Infrastructure.Vehicle (EcuCom): Control unit with control address 0x52 is not installed or does not respond.
Errors: Infrastructure.Vehicle.ODS8011E
Text: ODS8011E Infrastructure.Vehicle (EcuCom): Control unit with control address 0x62 is not installed or does not respond.
Errors: Infrastructure.Vehicle.ODS8011E
Text: ODS8011E Infrastructure.Vehicle (EcuCom): Control unit with control address 0x72 is not installed or does not respond.
Errors: Infrastructure.Vehicle.ODS8011E
Text: ODS8011E Infrastructure.Vehicle (EcuCom): Control unit with control address 0x05 is not installed or does not respond.
Errors: Infrastructure.Vehicle.ODS8011E
Text: ODS8011E Infrastructure.Vehicle (EcuCom):

I am seeking to find out if what they are suggesting is true and I am up for a lot of $$$ or can the ignition coil be replaced assuming the ECU just can't communicate with it.

Thanks for your help

 

Year model is 2009 which I believe has the IMMO3