So with a few spare ecu's and a 1.8t auq leon to tinker with i thought i would have a go.

06a906032mj was the ecu in the car

and attempted to flash onto a 06a906032hn (from another auq leon) and 06a906032hj (aum octavia) ecu (both immo off)

I've never tried cross flashing before as not sure what would happen. Plugged both ecus into the car and flashed with the "mj" ori file and bricked both ecu's. Recovered both on the bench and flashed back to stock, however both the hn and hj ecus now suffer from a "accelerator position sensor (g71) signal too high" when plugged into the test car. code and epc light on dash that will not clear.

This was what i always feared would happen if i did this so i'm glad i tried but i've heard others saying these ecus should be cross flashable? I likely did something wrong.

Any thoughts?