Autotuner Cannot Write Audi A8 EDC17CP44 via OBD Solution

Problem:

It’s an Audi A8 4.2 TDI 2014 with Bosch EDC17CP44 ECU. Tried writing 3 times with Autotuner via OBD but had same error every time. This vehicle has two ECU’s.

First said “Could not start transfer: 34 22”. Eventually said “This is neither a valid tuning nor a recovery file for the selected ECU”.

How to fix it?

Solution:

This ECU software ID is 0008.

0008 got new bootloader, there is a bug patching it in obd write, other tools too!

0008 software has a patch that blocks writing/flashing via OBD.

You can use bench, do manual bootloader patch. Bench this ecu, I’ve had this issue with kess3 everytime, on the 3.0 tdi, its the same ECU EDC17CP44.

Optionally, you can downgrade the software to 0005/0003 via OBD, and then everything works over OBD as well.