Got same prob as most?

hmm,
additive light,
so Peug/Cit or one of the other makes that use the PSA engine.
that system is to help the DPF stay clean,
ignore it and say goodbye to the DPF,or if it's the PSA1.4 or 1.6 it'll kill the engine too!
DPF filter soot,
same stuff you got up chimneys long ago,
the additive burns at a higher temperature so as to clean the filter,
No fluid means it will choke up.

1/4drive
October 2014

Don't tell us the car and expect us to answer?

Concerned Parent
October 2014