2014.5 Citroen C4 check engine

217
AdBlue® additive and SCR system
f
or
 
BlueHDi   Diesel   engines
To assure respect for the environment and c
onformity   with   the   new   Euro   6   emissions  
s

tandard,   without   adversely   affecting   the  
p

er formance   or   fuel   consumption   of   Diesel  
e

ngines,   CITROËN   has   taken   the   decision   to  
e

quip   its   vehicles   with   an   effective   system   that  
a

ssociates   SCR   (Selective   Catalytic   Reduction)  
w

ith   a   particle   filter   (FAP)   for   the   treatment   of  
e

xhaust   gases.
Presentation of the SCR system
Using an additive called AdBlue® containing urea, a
 
catalytic
 
converter
 
turns
 
up
 
to
 
85%   of   nitrous o

xides
 
(NOx)
 
into
 
nitrogen
 
and
 
water,   which   are
 h

armless
 
to
 
health
 
and
 
the
 
environment.
The AdBlue® additive is held in a special t
ank
 
located
  under   the   boot   at   the   rear   of  
t

he
 
vehicle.
 
It   has   a   capacity   of   17   litres:   this  
p

rovides
 
a
 
driving   range   of   about   12   500   miles  
(

20
 
000
 
km),
  after   which   an   alert   is   triggered  
w

arning
 
you
 
when   the   reserve   remaining   is  
e

nough
 
for
 
just   1   500   miles   (2   400   km).
During
 
each
  scheduled   service   of   your   vehicle  
b

y
 
a
 
CITROËN   dealer   or   a   qualified   workshop,  
t

he
 
AdBlue
® additive tank is refilled in order to a
llow
 
normal   operation   of   the   SCR   system.
If
 
the
 
estimated   mileage   between   two   services  
i

s
 
greater
 
than   12   500   miles   (20   000   km),   we  
r

ecommend
  that   you   go   to   a   CITROËN   dealer  
o

r
 
a
 
qualified   workshop   to   have   the   necessary  
t

op-up
 
carried   out. Once
  the   AdBlue
® tank is empty, a s
ystem
 
required
 
by   regulations   prevents  
s

tarting
 
of
 
the
 
engine.
If the SCR

is faulty, the level of
emissions
 
from
 
your   vehicle   will   no  
l

onger
 
meet
 
the
 
Euro   6   standard:   you  
v

ehicle
 
becomes
 
polluting.
In
 
the
 
event
 
of
 
a
 
confirmed   fault  
w

ith
 
the
 
SCR
 
system,   you   must   go  
t

o
 
a
 
CITROËN
 
dealer   or   a   qualified  
w

orkshop
 
as
 
soon   as   possible:   after  
a

 
running
 
distance   of   650   miles  
(

1 100
 
km),
 
a
 
system   will   be   triggered  
a

utomatically
 
to
 
prevent   engine   starting.
10
Checks

218
Range indicators
When switching on the ignition, an indicator gives   an   estimate   of   the   distance   that   can  
b

e   travelled   with   your   vehicle   before   engine  
s

tarting   is   automatically   prevented,   once   the  
v

ehicle   starts   using   the   reserve   of   AdBlue
® or
after
 
a
 
fault
 
is
 
detected
 
with
 
the
 
SCR
 
system.
In
 
the
 
event
 
of
 
simultaneous
 
system
 
fault
 
and  
l

ow
 
AdBlue
® level, the shortest range is the one d
isplayed.
In the event of the risk of non-starting related to a lack of AdBlue®
Range greater than 1 500 miles (2 400 km)
W hen   the   ignition   is   switched   on,   no  
i

nformation   on   range   is   displayed   automatically  
i

n   the   instrument   panel.
Remaining range between 350 and 1500 miles (600 and 2 400 km)
When switching on the ignition, the UREA warning   lamp   comes   on,   accompanied   by   an  
a

udible   signal   and   the   temporary   display   in  
t

he   instrument   panel   of   "NO   START   IN"   and  
a

  distance,   indicating   the   remaining   range  
e

xpressed   in   miles   or   kilometres   before  
e

ngine   starting   is   prevented   -   (For   example  
"

NO START   IN   900   miles"   means   that   "Starting  
w

ill   be   prevented   in   900   miles).
When
  driving,   this   display   appears   every  
1

50 miles   (300   km)   until   the   additive   tank   has  
be

en
 t
opped-up.
Go
  to   a   CITROËN   dealer   or   a   qualified  
w

orkshop   to   have   the   AdBlue
® tank topped-up.
Y
ou
 
can
 
also
 
top-up
 
the
 
tank
 
yourself.
Refer
 
to
 
the
 
"Topping-up"
 
section.
The
 
engine
 
start
 
prevention
 
system
 
r

equired
 
by
 
regulations
 
is
 
activated
 
a

utomatically
 
once
 
the
 
AdBlue
® tank is e
m pt y.
Checks

219
Breakdown related to a lack of AdBlue® additive
When switching on the ignition, the SERVICE warning   lamp   comes   on   and   the   UREA  
w

arning   lamp   flashes,   accompanied   by   an  
a

udible   signal   and   the   temporary   display   in   the  
i

nstrument   panel   of   "NO   START   IN"   and  
0
  km   or   miles   -   ("NO   START   IN   0   miles"   means  
"

Starting
 p
revented").
The
 Ad

Blue
® tank is  empty:  t he  s ystem  r equired  b
y
 
regulations   prevents   engine   starting.
Remaining range between 0 and 350 miles (0 and 600 km)
When switching on the ignition, the SERVICE warning   lamp   comes   on   and   the   UREA  
w

arning   lamp   flashes,   accompanied   by   an  
a

udible   signal   and   the   temporary   display   in  
t

he   instrument   panel   of   "NO   START   IN"   and  
a

  distance   indicating   the   remaining   range  
e

xpressed   in   miles   or   kilometres   before  
e

ngine   starting   is   prevented   -   (For   example  
"

NO START   IN   350   miles"   means   "Starting   will  
b

e   prevented   in   350   miles).
When
  driving,   this   display   appears   every  
3

0   seconds   until   the   additive   tank   has   been  
t

opped-up.
Go
  to   a   CITROËN   dealer   or   a   qualified  
w

orkshop   to   have   the   AdBlue
® tank topped-up.
Y
ou
 
can
 
also
 
top-up
 
the
 
tank
 
yourself.
Refer
 
to
 
the
 
"Topping-up"
 
section.
ot

her wise you will not be able to restart your
engine. To
  be   able   to   start   the   engine,  
w

e   recommend   that   you   call   on  
a

  CITROËN   dealer   or   a   qualified  
w

orkshop   for   the   top-up   required.   If  
y

ou   carry   out   the   top-up   yourself,   it   is  
e

ssential   to   add   at   least   3.8   litres   of  
Ad

Blue
® to the additive tank.
R
efer
 
to
  the   "Topping-up"   section.
10
Checks

220
In the event of a fault with the the SCR emissions control system
In the event of the detection
of a fault
The  UREA,   SERVICE   and   diagnostic   warning  
l

amps   comes   on,   accompanied   by   an   audible  
s

ignal   and   the   display   of   the   message  
"

Emissions
 f
ault".
The
  alert   is   triggered   when   driving,   when  
t

he   fault   is   detected   for   the   first   time,   then  
w

hen   switching   on   the   ignition   for   subsequent  
j

ourneys,   while   the   fault   persists.During an authorised driving phase
(between 650 miles and 0 miles) (1 100 km and 0 km)
If a fault with the SCR system is confirmed ( after   30   miles   (50   km)   covered   with   the  
p

ermanent   display   of   the   message   signalling  
a

  fault),   the   SERVICE   and   engine   diagnostic  
w

arning   lamps   come   on   and   the   UREA  
w

arning   lamp   flashes,   accompanied   by   an  
a

udible   signal   and   the   temporary   display   in  
t

he   instrument   panel   of   "NO   START   IN"   and  
a

  distance,   indicating   the   remaining   range  
e

xpress   in   miles   or   kilometres   before   engine  
s

tarting   is   prevented   -   (e.g.:   "NO   START   IN  
350
  miles"   means   "Starting   will   be   prevented  
in
  350   miles").
A
 
system
 
that
 
prevents
 
engine
 
starting
 
is
 
activated   automatically   from   650   miles   (1   100   km)   after   confirmation   of   a   fault   with   the   SCR   emissions  
c

ontrol
 
system.
 
Have
 
the
 
system
 
checked
 
by
 
a   CITROËN   dealer   or   a   qualified   workshop   as   soon   as   possible.
If
 
it
 
is
 
a
 
temporary
 
fault,
 
the
 
alert
 
d

isappears
 
during
 
the
 
next
 
journey,
 
a

fter
 
a
 
self
 
diagnosis
 
test
 
of
 
the
 
SCR
 
e

missions
 
control
 
system. While
  driving,   this   display   appears   every  
30   seconds   while   the   fault   with   the   SCR   system  
p

ersists.
The
  alert   is   repeated   when   switching   on   the  
ig

nition.
You
  should   go   to   a   CITROËN   dealer   or   a  
q

ualified   workshop   as   soon   as   possible.
ot

her wise, you will not be able to restart your
engine.
Checks

221
Starting prevented
Every  time   the   ignition   is   switched   on,   the  
S

ERVICE   and   engine   diagnostic   warning  
l

amps   come   on   and   the   UREA   warning   lamp  
f

lashes,   accompanied   by   the   temporary   display  
o

f   "NO   START   IN"   and   0   miles   or   kilometres -  
(

"NO   START   IN   0   miles"   means   "Starting  
p

revented").
To
  be   able   to   start   the   engine,   you   must   call   on  
a

  CITROËN   dealer   or   a   qualified   workshop.
You
  have   exceeded   the   authorised  
d

riving   limit:   the   starting   prevention  
s

ystem   inhibits   engine   starting.Freezing of the AdBlue® additive
The
 
AdBlue
® additive freezes at t
emperatures   below   around   -11°C.
The
 
SCR
 
system   includes   a   heater  
f

or
 
the
 
AdBlue
® tank, allowing you to c
ontinue
 
driving   in   very   cold   conditions.
10
Checks

224
F Obtain  a   bottle   of   AdBlue®. After first c
hecking
 
the
 
use-by
 
date,
  read   carefully  
t

he instructions on use on the label before
pouring
 
the
 
contents
 
of
 
the   bottle   into   your  
v

ehicle's
 Ad

Blue
® tank. F  
A
fter   emptying   the   bottle,   wipe   away   any  
s

pillage   around   the   tank   filler   using   a   damp  
c

loth.
F  
R
efit   the   blue   cap   to   the   tank   and   turn   it  
a
  6
th of a turn clockwise, to its stop.
F
 R
efit   the   black   plastic   blanking   plug,  
c

lipping   it   in   on   the   flap
F
 
D

etach   the   cord   from   the   parcel   shelf  
s

upport   and   lower   the   boot   floor.
Important:
 
if
 
your
 
vehicle's
 
AdBlue®
tank
 
is
 
completely
 
empty
 
-
 
which
 
is
 
c

onfirmed
 
by
 
the
 
alert
 
displays
 
and
  the  
i

mpossibility
 
of
 
starting
 
the
 
engine
 
-  
you
 
must
 
add
 
at
 
least
 
3.8 litres
 

(so
 
two
 
1.89
 
litre
 
bottles). If
  any   additive   is   split   or   splashed,   wash  
i

mmediately  
w
ith  
c
old  
w
ater  
o
r  
w
ipe  
w
ith  
a

  damp   cloth.
If   the   additive   has   crystallised,   clean   it  
o

ff   using   a   sponge   and   hot   water.Important:
 i
n the event of a top-up
after a breakdown because of a lack
of additive ,   you   must   wait   around  
5   minutes   before   switching   on   the  
ig

nition,
 w
ithout opening the
driver's door, locking the vehicle,
introducing the key into the ignition
switch, or introducing the key of the
"Keyless Entr y and Star ting" system
into the passenger compartment .
Switch   on   the   ignition,   then,   after  
10   seconds,   start   the   engine.
Never   dispose   of   AdBlue
® additive b
ottles
 
in
 
the
 
household
 
waste.   Place  
t

hem
 
in
 
a
 
special
 
container   provided  
t

his
 p

urpose
 o

r
 t

ake
 t

hem
 t
o
 y
our
 d
ealer.
Checks

229
Removing the cartridge
F Stow  the   black   pipe.
F  D etach   the   angled   base   from   the   white   pipe.
F
 
S
upport   the   compressor   vertically.
F
 
U
nscrew   the   cartridge   from   the   bottom. F
 
C
onnect   the   compressor's   electrical  
c

onnector   to   the   vehicle's   12   V   socket.
F
 
S
tart   the   vehicle   and   let   the   engine   run.
F
 
A
djust   the   pressure   using   the   compressor  
(

to   inflate:   switch   B in position "I";
  to  
d

eflate:   switch   B in position "O"
 
and   press  
b

utton C),
  according   to   the   vehicle's   tyre  
p

ressure   label   or   the   accessory's   pressure  
lab

el.
F
 
R
emove   the   kit   then   stow   it.
Checking tyre pressures / inflating accessories
You can also use the compressor, without injecting   any   product,   to:
-
 
c
heck   or   adjust   the   pressure   of   your   tyres,
-
 
i
nflate   other   accessories   (balls,   bicycle  
t

yres...).
F

T
urn the selector A to the "
ai
r"
position.
F
 
U
ncoil   the   black   pipe   H  
f
ully.
F
 
C
onnect   the   black   pipe   to   the  
v

alve   of   the   wheel   or   accessory.
 I

f   necessary,   fit   one   of   the   adaptors  
s

upplied   with   the   kit   first.
Beware
 
of
 
discharges
 
of
 
fluid.
The
 
expiry
 
date
 
of
 
the
 
fluid
 
is
 
indicated
 
o

n
 
the
 
cartridge.
The
 
sealant
 
cartridge
 
is
 
designed
 
for
 
s

ingle
 
use;
 
even
 
if
 
only
 
partly
 
used,
 
it
 
m

ust
 
be
 
replaced.
After
 
use,
 
do
 
not
 
discard
 
the
 
cartridge
 
i

nto
 
the
 
environment,
 
take
 
it
 
to
 
an
 
a

uthorised
 
waste
 
disposal
 
site
 
or
 
a
 
C

ITROËN
 
dealer.
Do
 
not
 
forget
 
to
 
obtain
 
a
 
new
 
sealant
 
c

artridge,
 
available
 
from
 
CITROËN
 
d

ealers
 
or
 
from
 
a
 
qualified
 
workshop.
11
Practical information

253
When your vehicle's battery is discharged, the engine   can   be   started   using   a   slave   battery  
(

external   or   on   another   vehicle)   and   jump   lead  
c

ables.
Starting using another
battery
First check that the slave battery has a n ominal   voltage   of   12   V   and   a   capacity  
a

t   least   equal   to   that   of   the   discharged  
b

attery.
Do
  not   try   to   start   the   engine   by  
c

onnecting   a   battery   charger.
Do
  not   disconnect   the   (+)   terminal   when  
t

he   engine   is   running. F
 
S
tart   the   engine   of   the   vehicle   with   the  
g

ood   battery   and   leave   it   running   for   a   few  
m

inutes.
F  
O
perate   the   starter   on   the   broken   down  
v

ehicle   and   let   the   engine   run. I
f   the   engine   does   not   start   straight   away,  s
witch   off   the   ignition   and   wait   a   few  
m

oments   before   trying   again.
Before disconnecting the battery
Wait 2 minutes after switching off the ignition before   disconnecting   the   battery.
Close
  the   windows   and   the   doors   before  
d

isconnecting   the   battery.
F
 
R

emove
 
the
 
plastic
 
cover
 
from
 

the
 
(+)
 
terminal,
 
if
 
your
 
vehicle
 
has
 
one.
F
 C
onnect
 
the
 
red
 
cable
 
to
 
the
 
positive
 
t

erminal
 
(+)
 
of
 
the
 
flat
 
battery
 
A , then to the
positive
 
terminal
 
(+)
 
of
 
the
 
slave
 
battery
 
B.
F
 
C

onnect
 
one
 
end
 
of
 
the
 
green
 
or
 
black
 
c

able
 
to
 
the
 
negative
 
terminal
 
(-)
 
of
 
the
 
s

lave battery B (or earth point on the other
vehicle).
F
 
C

onnect
 
t

he
 
o

ther
 
e

nd
 
o

f
 
t

he
 
g

reen
 
o

r
 
b

lack
 
c

able to the earth point C
 
on
 
the
 
broken
 
d

own
 
vehicle
 
(or
 
on
 
the
 
engine
 
mounting). F
 
W
ait   until   the   engine   returns   to   idle   then  
d

isconnect   the   jump   lead   cables   in   the  
r

everse
 o
rder.
F  
R
efit   the   plastic   cover   to   the   (+)   terminal,   if  
y

our   vehicle   has   one.
11
Practical information