C4 Picasso 2014 auxiliary belt reset

[Vikis]

Hello,

Citroen C4 Picasso 2014 2L 150 hp. There are three fault codes:
P16AB
P1383
P0494.
I'm concerned about the first two codes. As I know, the first two faults are by kilometer count and not by some sensor. What I tried to do was go into Engine ECU - parts replacement - system start stop - change auxiliary belt.
I get the message that it was not successful, try again or something.
I tried with Diagbox clone, Launch, and Autel. Exactly the same thing with all of these.
Can anybody help me with this?
Thank you

[PaulC5]

Can you post the definition for the fault codes to save us having to search on them.

[Vikis]

Sorry, I haven't saved it. I will try to upload it tomorrow. It is basically about the auxiliary belt being worn, with a risk of breaking or something. My Diagbox was in French, so maybe my translation is not very good