2006 Alfa Romeo 166 catalytic converter

WARNING SYMBOLS
Power steering
Do not exceed the maximum fluid level in the
reservoir. Use only the recommended fluid; see
table “Specifications of fluids and lubricants”.
Brake circuit
Do not exceed the maximum fluid level in the
reservoir. Use only the recommended fluid; see
table “Specifications of fluids and lubricants”. Catalytic converter
Do not park over inflammable materials. See para-
graph “Protecting emission reducing devices”. Belts and pulleys
Moving parts; keep limbs and clothing away.
Jack
See the owner Handbook.
Climate control tubing
Do not open.
Gas under high pressure.
PROHIBITION SYMBOLS
Battery
Keep away from children. Battery
Keep away from naked flames.
Heat shields - belts - pulleys - fan
Do not touch.
AIRBAG
Passenger’s Air bag
Do not install a child’s seat on the front passen-
ger’s seat with operational air bag.
7

76
Engine control system
(EOBD) failure
(optional for versions/
markets where applicable)
Normally, when you turn the ignition
key to MAR, the warning light must
come on but must switch off when the
engine is running. It initially lights up to
indicate that the warning light is working.
If the warning light stays on permanent-
ly or comes on when the car is moving:
1)With a fixed light- indicates
that the supply/ ignition system is mal-
functioning that could cause high exhaust
emissions, possible loss of performance,
bad driveability and high consumptions.
In these conditions, you way continue
to drive while avoiding asking a lot from
the engine or high speeds. The prolonged
use of the car when this warning light is
on could cause damage. Contact an Alfa
Romeo Authorized Service Station as
soon as possible. The warning light turns
off if the malfunction disappears, howev-
er the system stores the warning anyhow.
U
2)Flashing light - indicates that the
catalytic converter could be damaged
(see paragraph on “EOBD System” in
this chapter).
If the warning light is on and flashing,
take your foot off the accelerator and dri-
ve at low speeds until the warning light
stops flashing; continue travelling at a
moderate speed trying to avoid driving
conditions that could cause the warning
light to flash again. Contact an Alfa
Romeo Authorized Service Station as
soon as possible.
If, when turning the ig-
nition key to MAR, the
Uwarning light does
not switch on or if, when dri-
ving, the light flashes or emits a
fixed light, contact an Alfa
Romeo Authorized Service Sta-
tion as soon as possible.
Engine control system
(versions for markets where
applicable)
1) In normal conditions, turning the ig-
nition key to MAR, the dial warning
light turns on but it should go off when
the engine has started. The initial turning
on indicates that the warning light is
working properly.
2) If the warning light stays on or turns
on when travelling, it indicates a fault in
the supply /ignition system which could
cause high exhaust emissions, possible
lack of performance, poor handling and
high consumption levels.
In these conditions, it is possible to con-
tinue driving without however demanding
heavy effort or high speeds.
Prolonged use of the car with the warn-
ing light on may cause damage. Contact
an Alfa Romeo Authorized Service as
soon as possible.
The warning light turns off if the fault
disappears, but it is still stored by the sys-
tem.
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131
EMISSION REDUCING DEVICES
(diesel engines)
Oxidising catalytic converter
Converts the polluting substance in the
exhaust gases (carbon monoxide, un-
burnt hydrocarbons and particulate), thus
reducing the fumes and smell that are
typical of diesel engines.
The catalytic converter consists of a
stainless steel case that houses a ceramic
honeycomb coated with noble metal used
as a catalyst.Exhaust gas recirculation system
(E.G.R.)
This system recycles, i.e. re-uses, a
varying percentage of the exhaust gases
depending on engine operating condi-
tions.
It is used, when necessary, to control ni-
tric oxides.

151
Use an auxiliary battery to start the ve-
hicle in an emergency.
If the engine is not “running smoothly”
when the vehicle is travelling, reduce the
request for performance to a minimum
and contact Alfa Romeo Authorized Ser-
vices as soon as possible.
When the fuel reserve warning light
comes on fill up as soon as possible. A
low fuel level may cause an irregular sup-
ply to the engine with inevitable increase
of the exhaust gas temperature.
When travelling downhill for long
stretches slightly rev the engine every
now and again. This action will extend
the life of the catalyzer.
Never run the engine, even as a test,
with one or more spark plugs disconnect-
ed.
During normal operation
the catalytic converter
reaches high temperatures. Do not
therefore park the vehicle over in-
flammable materials (grass, dry
leaves, pine needles etc.): fire haz-
ard. Do not install other heat
shields and do not remove the ex-
isting ones on the catalyst and on
the exhaust pipe.
Do not spray anything on the cat-
alyst, lambda sensor and exhaust
pipe.
WARNING
The failure to follow
these rules may cause a
fire hazard.
WARNING

225
– Application of enamels with greater
resistance to atmospheric pollutants.
– Adoption of “open” boxed parts to
prevent condensation from triggering cor-
rosion from the inside.
The underbody is treated with the appli-
cation of a special protective material.
If this protective layer requires restora-
tion the exhaust system, lambda probe
and catalytic converter must be left free
of any wax, oil, plastic and/or inflamma-
ble product.
This should therefore be carried out by
Alfa Romeo Authorized Services.SPRAY JETS
Make sure that the windscreen and
headlight washer jets deliver a jet of fluid
which is adequate and correctly directed.
If the spray devices are not working
check that the supply circuit is not
blocked. If necessary unclog the nozzles
using a needle.
BODYWORK
PROTECTION FROM
ATMOSPHERIC AGENTS
Alfa Romeo employs manufacturing
technologies which are designed to pro-
tect the bodywork against chemical corro-
sion caused by various factors, for exam-
ple:
– atmospheric pollution.
– Salty air and humidity (coastal areas,
hot-humid climates).
– Road surfaces covered with salt and
de-icing products during the winter.
To further increase resistance against
corrosion the following procedures have
been adopted:
– painting system and paint products
which render the vehicle particularly resis-
tant to corrosion and abrasion.
– Wide use of sheet metal which is ex-
tremely resistant to corrosion.
– Spraying of the underbody, engine
bay, wheel arches and boxed parts with
suitable products which adhere strongly
to the metal parts and have a high pro-
tection capability.