Yes.
Write may fail too. Better have a known working bootmode setup handy or a spare ECU.
Is the risk of brikking it the same if i use boot mode?, Im getting a donor ecu with wideband o2 of ebay so will test if it work with that before Im trying boot mode.
I also have fgtech v54 but think i will try nefmoto in boot mode before trying with fgtech.
Thanks for your help