citreon ds3 anti poplution fault

[gun12b]

my daughters ds3 is showing this fault, any ideas to what it could be ??
it had an o2 sensor fitted 6 months ago.
thx in advance

[tonyb1968]

What engine are we talking about here and how old?

If its a new diesel then I would say you either have a dpf issue or your ad blue is low.

[gun12b]

1.6 2010 plate
borrowed my mates obd, and reset the code all good now.

[SebringMan]

If it is using the PSA Eolys fluid clearing the code may make things worse.

This fluid needs to be refilled and the counter on the ECU correctly reset. Bodge this at your peril.

[gun12b]

the code came back on the next day.
fitted one of these myself, all good now