Problem:
It’s a Peugeot 508 keyless model. Autotuner read DCM7.1A – Delphi OK via OBD, unlock ECU ok, but fail to OBD write after unlocking ECU.
Solution:
You have to hold and press key against the column the entire time if the writing yes.
Follow instructions exactly.
Hold the key in your hand throughout the writing process.
Always works with key held against column, it shows on autotuner instructions where to hold key.
Try holding key next to steering column as shown, and see if dash lights up
If lights come on you can rewrite the file with key again just make sure key is exactly where is should be as shown.