CITROËN DS 4 Handbook page 301

Starting prevented
Every time the ignition is switched on, the
SERVICE and engine diagnostic warning
lamps come on and the UREA warning lamp
flashes, accompanied by the temporary display
of "NO START IN" and 0 miles or kilometres -
("NO START IN 0 miles" means "Starting
prevented").
You have exceeded the authorised
driving limit: the starting prevention
system inhibits engine starting.
To be able to start the engine, you must call on
a CITROËN dealer or a qualified workshop.
In the event of a fault with the the SCR emissions control system
Type 2 instrument panel
A system that prevents engine
starting is activated automatically
from 650 miles (1 100 km) after
confirmation of a fault with the SCR
emissions control system. Have the
system checked by a CITROËN dealer
or a qualified workshop as soon as
possible.
In the event of the detection of a fault
The UREA, SERVICE and diagnostic warning
lamps comes on, accompanied by an audible
signal and the display of the message
"Emissions fault".
The alert is triggered when driving when the
fault is detected for the first time, then when
switching on the ignition for subsequent
journeys, while the fault persists.
If it is a temporary fault, the alert
disappears during the next journey,
after self-diagnosis of the SCR system.
299
Checks