Additive Level Reset - No response from ECU

This is the Forum for all your Peugeot Technical Questions, Problems or Advice.
Martins2759
Posts: 1
Joined: 29 Apr 2025, 18:01

Additive Level Reset - No response from ECU

Unread post by Martins2759 »

Hello everyone,

I'm having trouble resetting the Additive Level counter. When I do a full test, unlike other examples I see on here, I do not see a dedicated Additive Pump ECU. I can, however, via the Engine ECU, get to a menu where I see a "Diesel fuel additive control unit", which gives me options to reset the counter. When I try this, the ECU never responds.

Car: Peugeot 206 CC 1.6 HDi
MOC: 11014
VIN: VF3**************[VIN obfuscated, can be read by forum staff]
Diagbox versions I've tried: 7.58 and 9.68

I select "206MUX" as I believe that is the right option given my MOC code, and have tried the plain "206" option, but still with no luck getting a response from the ECU.

What else should I try?
Could I be looking at a bad fuel additive control unit? If so, where would it be located?

Thanks in advance!