2012 AUDI A3 check engine

200 Checking and filling
(D Note
Driving with an insufficient oi l level is like­
ly to ca use seve re damage to the eng ine.
@ Tips
- The oil pressure warning display. i s
not an indicator of the oil level. Do not
r ely on it. Instead , check the oil level in
your engine at regular intervals, pref ­
erably each t ime you refuel, and always
before going on a long trip .
-If you have the impression your engine
consumes excessive amo unts of oi l, we
r ecommend that yo u consult your au­
thorized Aud i dea ler to have the caus e of
you r concern p rope rly diag nosed. Keep in
mi nd t hat t he accur at e measure ment of
oi l cons ump tion requires great care and
may ta ke some time. Yo ur autho rize d Au ­
di dea ler has inst ruct ions about how to
measure oil consumptio n accurately.
Checking the engine oil level
Fig. 15 9 Dipstick (Ve rs io n A) : Oi l level ranges
Fig . 160 Dipstick (Ve rs io n B): Oil leve l ra nges
B efore you che ck any thing i n the eng ine com ­
p ar tmen t,
alway s read and heed all WARN-
INGS ~ .&. in Working in the engine comport ­
ment on poge 19 4.
Determining oil level
• Park yo ur vehicle so tha t it is hori zo ntally
level.
• Wh ile at ope rat ing st ate tempe rat ure,
briefly let the engine r un at idle and then
shut it off .
.. Wait approx. two minutes.
.. Pull out the oil dipst ick. W ipe off t he oil
d ipstick with a clean cloth, and slide it back
in as far as it w ill go.
• Pull it back out and read off th e oil level
~ fig. 159 or ~ fig. 160. Top off the eng ine
oil, if applicable ~
poge 200.
Oil level within range 0
.. Do not add oil.
Oil level within range@
• Yo u con add oil. Afterwords, the oil leve l
should be within range
G) .
Oil level within range 0
• Yo u must ad d oil. Afterwards, the oil leve l
should be wi thin r ange
G) .
The oil level need s to be checke d at regu la r in ­
te rva ls. Th e be st ti mes to do th is are w henev ­
er you refuel and prior to long trips .
Depend ing on the way the vehicle is dr iven
and the ope ra tin g con ditions, oi l co nsumption
c a n b e up to 1/ 2 quar t pe r 600 mile s (0. 5 li ter
p er 2,000 km). Co nsumption m ay be hig he r
within the first 3,00 0 miles (5,000 km) .
'1:::7: Adding engine oil
Fi g. 16 1 Engine compa rtment: Oil filler cap location

Before you check anything in the engine com­
partment,
always r ead and heed all W ARN­
ING S
¢ A in Working in the engine compart­
ment on page 194.
.. Park your vehicle so that it is horizontally
level.
.. Stopping the eng ine.
.. Unscrew the cap
«t=;,. to the engine oil fill ing
hole
¢fig. 161 .
.. Carefully top off with the appropriate o il in
0 .5 lite r doses.
.,. Check the o il leve l again after two minutes
¢ page 200.
.,. Top off the oil again, if necessary.
.. Screw the cap back on the filling hole and
slide the oil dipstick in as far as it will go.
A WARNING
- While topping off, the oil must not come
in contact with hot engine parts -fire
hazard!
- The oil filler cap must be properly se­
c u red to prevent oil from being sprayed
on the hot engine and exhaust system
when the eng ine is running - fire hazard!
- If your skin has come in contact w ith the
engine oil, you must subsequently
cleanse it tho roughly .
(D Note
-The oil leve l must not be above range~
- danger of converter or eng ine damage!
Contact a qualified workshop to draw off
oi l, if necessary .
-Audi does not recommend the use of o il
add iti ve s. They may damag e the engine
and adve rsely affect you r New Vehicle
Limited Warranty .
@) For the sake of the environment
-Under no circumstances can the o il come
i n contact with the sewage network or
the soil.
- Observe and follow legal regu lations
when d isposing of empty oil containers.
Checkin g and fillin g 201
Changing the engine oil
We recommend that have your oil changed by
an authorized Audi dealer or a qualified serv­
ice station .
Before you check anyth ing in the eng ine com­
partment,
alw ays read and h eed all WARN­
INGS ¢
A in Working in the engine compart­
ment on page 194 .
The engine oil mus t be changed according to
the intervals spec ified in your Warranty
&
Maintenance booklet. This is very important
because the lubricat ing properties of o il di­
min ish g radually du ring normal vehicle use .
Under some c ircumstances the engine oil
should be changed more frequent ly . Change
o il more ofte n if you drive mostly short d is­
tan ces, opera te the veh icle in dus ty a reas or
u nder p redominant ly stop -and-go traffic con­
ditions, or have you r vehicle where tempera ­
tures remain below freezing for extended pe­
riods .
Dete rgent additives in the oil will make fres h
o il look dar k after t he engine has been run ­
ning for a sho rt time. T his is normal a nd is not
a reason to change the oil more often t han
recommended.
Because of the prob lem of p roper disposal,
along with the specia l tools and necessary ex­
pertise req uired, we strongly recommend that
you have your oil changed by an authorized
Audi dealer or a qualified service station.
If you choo se to change your oil your self ,
please note the fo llowing important informa ­
tion:
A WARNING
To reduce the risk of personal injury if you must change the eng ine oil in your vehicle
yourself:
- Wear eye protect ion.
- To reduce the risk of burns from hot en-
gine oil, let the engine cool down to the
touch.
•
•

202 Checking and filling
-When removing the oil drain plug with
your fingers, stay as far away as possible.
Always keep your forearm parallel to the
ground to help prevent hot oil from run­
ning down your arm.
- Drain the oil into a container designed
for this purpose, one large enough to
hold at least the total amount of oil in
your engine.
- Engine oil is poisonous. Keep it well out
of the reach of children .
- Continuous contact with used engine oil
is harmful to your skin. Always protect
your skin by washing oil off thoroughly
with soap and water.
(D Note
Never mix oil additives with your engine
oil. These additives can damage your en­
gine and adversely affect your Audi New
Vehicle Limited Warranty.
@) For the sake of the environment
- Before changing your oil, first make sure
you know where you can properly dispose
of the used oil.
-Always dispose of used engine oil proper­
ly. Do not dump it on garden soil, wood­
ed areas, into open streams or down
sewage drains.
- Recycle used engine oil by taking it to a
used engine oil collection facility in your
area, or contact a service station.
Important information for vehicles with
diesel engine when adding or changing
engine oil
App lies to vehicles: with diesel engine
On vehicles with a diesel engine always use
engine oil that conforms to Audi oil specifica­
tion VW
507 00 when adding or changing en­
gine oil.
Vehicles with diesel engines require and
must
always
use special engine oil that conforms to
Audi oil specification
VW 507 00 .
Never use any other kind of engine oil in your
vehicle, not even to top off the oil level.
At the time of printing, we are aware that Cas­
trol ® produces engine oil that conforms to Au­
di oil specification VW 507 00. This oil may
not yet be available throughout North Ameri­
ca. Other oil manufacturers may offer engine
oil that conforms to Audi oil specification
VW 507 00 at this time or some future date.
Please be sure to consult with your authorized
Audi dealer for information and availability of
the proper engine oil for your vehicle's diesel
engine and for the latest technical informa­
tion .
Because this special engine oil may not be
available when need it, we strongly recom­
mend that you always carry with you extra
quart (liter) of oil that conforms to Audi oil
specification VW 507 00, in case you have to
top off oil while on the road .
.&, WARNING
Failure to use engine oil for your diesel en­
gine that expressly conforms to Audi oil
specification VW 507 00 can cause engine
failure on the highway that can cause a crash and serious personal injury.
- Never use any amount of engine oil in
the diesel engine that does not conform
to Audi oil specification VW 507 00.
- Always carry with you an extra quart (li­ ter) of engine oil that conforms to Audi
oil specification VW 507 00 in case you must top off the oil while on the road.
.&, WARNING
Improperly stored items can become air­borne missiles, flying through the vehicle
causing serious personal injury in the
event of hard braking or an accident . To
help reduce the risk of serious personal in­
Jury:
-Always store extra quart (liter) of engine
oil for your diesel engine in its original oil
container that is securely closed in the
~

luggage compartment. Make sure the
container is securely stored and mount­
ed.
0 Note
-If you use engine oil that does not ex­
pressly conform to Audi oil specification
VW 507 00, very serious and very expen­
sive damage to your vehicle 's engine will
occur . Engine damage caused by using
the wrong engine oil is not covered by
your New Vehicle limited Warranty .
- Not all commercially available oils con ­
form to this very rigid Audi oil quality
standard even though they may be syn­
thetic-based and have the same viscosi­
ty.
Engine cooling system
Coolant
T he engine coolant performs two functions: it
keeps the engine from overheating and it pro­
tects the engine from freezing in the winter.
The cooling system is sealed and generally re­
quires little attention.
The cooling system has been filled at the fac­
tory with a permanent coolant which does not need to be changed. The coolant consists of a
mixture of water and the manufacturer's gly­
col-based coolant additive Gl2++ antifree ze
with anticorrosion additives (50% for USA models; 60% for Canadian models). This mix ­
ture both assures the necessary frost protec­
tion and protects metal components in the
engine 's cooling system from corrosion and
scaling.
It also raises the boiling point of the
coolant.
Do not reduce the concentration of the cool­
ant in the summer by adding plain water.
The
proportion of coolant additive must be at
least 50% but not more than 60%
to main­
tain antifreeze protection and cooling efficien­
cy. If the coolant frost protection is too low,
the coolant could freeze and damage the vehi­
cle heating and engine cooling system.
Checking and filling 203
For year-round driving, antifreeze is added at
the factory for temperatures down to:
--31°F(-35°C)USA
- - 40 °F ( - 40 °C) Canada.
You can mix the Gl2 ++ coolan t additive with
other additives Gl2 + or Gl2. Always check
with your authorized Audi dealer .
A WARNING
-
Before you check anything in the engine
compartment, always read and heed all
WARNINGS~
& in Working in the engine
comportment on page 194.
(D Note
- Before winter sets in, have the coolant
checked to see if the coolant additive in
your vehicle is sufficient to meet the cli­
mate conditions. This is especially impor­
tant if you live in a region where the
win­
ter is extremely cold. If necessary, in­
crease the proportion of coolant additive
to 60% .
- When adding coolant additive to your
cooling system, remember :
- We recommend using only coolant ad­
ditive G 12++ (check the label) for your
vehicle. This coolant additive is availa­
ble at authorized Audi dealers. Other
types of antifreeze can significantly re­
duce corrosion protection. The result­
ing corrosion can cause a loss of cool­
ant and serious engine damage.
- Do not add any type of radiator leak seal­
ant to your vehicle's engine coolant.
Adding radiator repair fluid may adverse­ ly affect the function and performance of
your cooling system and could result in
damage not covered by your New Vehicle
Limited Warranty.
•
•

204 Checking and filling
Checking the engine coolant level
The engine coolant level can be checked with
a quick glance .
Fig. 162 Engine compartme nt: coo lant expansio n tank
Before you check anything i n the eng ine com­
partment,
a lw ays rea d and h eed all WARN­
ING S ¢&. in Working in the engine compart­
ment on page 194.
.. Park your vehicle on a level surface.
.. Turn
off the ignit ion .
.. Read the eng ine coolant leve l from the
coolant expansion tank<=>
fig. 162 . With a
cold eng ine, the coo lant level should be be­
tween the "min" and "max" markings . When
the engine is warm, the level may be slightly above the "max" marking.
The location of the coolant expansion tank
can be seen in the engine compartment illus­
tration
i:> page 196.
To obtain an accurate read ing, the engine
must be switched
off.
The expansion tank in yo ur vehicle is equipped
with an e lectric coolant level sensor .
When the coolant level is too low, the warning light in the Auto -Check System
c> page 17 w ill
blink until you add coo lant and the level has
been restored to norma l. Even though there is
an electric coolant level sensor, we still rec­
ommend you check the coolant level from
time to time.
Coolant lo ss
Coolant loss may indicate a le ak in the cooling
system . In the event of coolant loss, the cool­
ing system should be inspected immediately by your authorized Audi dea
ler .
It is not
enough merely to add coolant .
In a
se aled system, losses can occur on ly if
the boiling point of the coo lant is exceeded as
a res ult of overheating.
(D Note
Do not ad d any type of radiator leak sea l­
ant to your veh icle's engine coolant . Add­
i ng radiator repair fl uid may adverse ly af ­
fect the funct ion and performance of your
cooling system and could result in damage not covered by your New Veh icle Limited
Warranty .
Adding coolant
Be very careful when adding engine coolant.
Before you check anything in the eng ine com ­
partment,
a lw ays re a d and heed all WARN­
INGS c::> A in Working in the engine compart ­
ment on page 194 .
.. Turn off the engine .
.. Let the engine cool down.
.. Place a thick rag over the coolant expansion
tank
c::> page 204, fig . 162 and ca refull y
twist the cap counter-clockwise c::> A.
.. Add coo lant .
.. Twist the cap on aga in
tightly .
Replacement engine coolant must conform to
exact spec ificat ions
c::> page 203, Coolant.
Even in an emergency, if coolant addi-
t ive G12++ . G 12+ or G12 is not ava ilable, do
n ot use a d iffe rent addit ive. Use plain water
instead unt il you can get the correct add itive
and can restore the correct ratio. This shou ld
be done as soon as possible .
If you have lost a considerab le amou nt of
c oolant, then you sho uld add cold ant ifree ze
and co ld wate r on ly when the engine is cold.
Always use
new engine coo lant when refilling .
Do not f ill coolant above the
"MAX" mark. Ex­
cess coolant will be forced out through the
pressure relief valve in the cap when the en -
gine becomes hot .
Iii>

& WARNING
-The cooling system is under p ress ure and
can get very hot . Reduce the risk of
sca ld ing from hot coo lant by following
these steps.
- Tur n off the engine and a llow it to cool
down.
- Protect your face, hands and arms from
escap ing flu id and steam by cover ing
the cap wi th a large, thick rag.
- Tu rn the cap slowly and very ca refully
i n a cou nte r-clockw ise d irect ion w hile
ap ply ing ligh t, downw ard press ure on
the top of the cap.
- To avo id being burned, do no t sp ill an­
tifreeze o r coolan t on the exhaust sys­
tem or hot engine parts. Under certa in
conditions, the ethylene glyco l in en­
gine coolant can catc h fir e.
- An tifreeze is poisonous . Always store an ­
tifreeze in its or iginal co ntainer and we ll
o ut o f the reach of children.
- If you drain the coolant, it must be
caught and safely stored in a p roper con­
tainer clearly marked "poison".
(D Note
- Coolant po llutes the env ironment and
could cause an engine fire. Excess coo l­
ant wi ll be forced out throug h the pres ­
su re re lief va lve in the cap when the en­
gine becomes hot.
- If, in an emergency, only water can be
added, the cor rect ratio between water
and antifreeze
c:> page 203 must be re­
stored as soon as possib le.
@) For the sake of the environment
Drained coolant shou ld n ot be re used. Al­
ways dispose of used coolant while obse rv­
ing all environmental regulations.
Checkin g and fillin g 205
Radiator fan
The radiator fan switches on automatically by
itself .
The electric radiator fan is controlled by ther­
moswitches t hat sw itch on a nd off depending
o n coo lant and eng ine compartment tempera ­
tures .
An a uxiliary electric radiator fan* sw itches on
and off depending on coolant temperature
and othe r vehicle operat io n conditions.
After switching off the eng ine, the auxiliary
fan -even with the ignition off -can continue
runn ing for up to 10 minutes. It ca n even
switch on aga in later by itself
c:> A , if
- the temperature of the engine coo lant rises
due to the heat build-up from the engine in
the engi ne compartment , or
- the engine compa rtment heats up because
the vehicle is parked in intense sunlig ht.
& WARNING
- To reduce the risk of personal in ju ry nev­
er touch the radiator fan .
- The auxiliary electric fan is temperature
contro lled a nd can switch on suddenly
even when the engine is not ru nning.
- The a uxiliary radiator fa n sw itches on a u­
tomatically when the engine coo lant
reaches a certa in te mpera tu re and w ill
con tinue to ru n until t he coo lant temper­
a ture drop s.
•
•

206 Checking and filling
Brake fluid
Checking brake fluid level
The brake fluid level can be checked with a
quick glance .
Fig. 163 Engine compartme nt: brake flu id reservo ir
Before you check anything i n the engine com ­
partment,
a lwa ys rea d and h eed a ll WA RN·
ING S c:> & in Working in the engine compart ­
ment on page
194.
~ Read the brake fluid level from the bra ke
fluid reservoir. The brake fluid Level must be
between the "MIN" and "MAX" markings
9fig. 163 .
The brake f lu id rese rvoir is located at the rear
partition of the engine compartment on the
L eft side
¢page 196.
The fluid level may drop slightly after some
time due to the automatic adjustment of the b rake pads . This is not cause for alarm .
I f the b rake fluid Level falls
considerably be­
low the "MIN" mark, the brake wa rning/ind i­
cator Light (U.S. models:
1111 , Canadian
models:
llllt will come on c:> page 15 . Do not
continue to operate the vehicle . The complete
brake system sho uld be thoroughly checked
by an authorized Audi dealer or other quali­
fied facility and the cause corrected. If the
brake fluid level is too low, the brake warn ing/
indicator Light w ill illuminate . Contact an au­
thor ized Audi dealer
imm ediatel y.
Changing brake fluid
Have the brake fluid changed by an experi­
enced technician .
Brake fluid absorbs moisture from the air. If
the water content in the brake fluid is too high, corrosion in the brake system may result
after a period of time . The boiling point of the
brake flu id will also decrease conside rably and
decrease braking pe rformance.
Therefore, the brake fluid must be changed
eve ry two y ears. Always use new brake flu id
which conforms to Federal Motor Veh icle
Standard "F MVSS 116 DOT 4".
The brake fluid reservoir can be diff icult to
reach, therefore, we recommend that you
have the b rake fluid changed by your author­
ized
Audi dealer . Your dealer has the correct
tools, the right brake fl uid and the know -how
to do this for you.
A WARNING
- Brake fluid is poisonous . It must be stor­
ed only in the closed original container
out of the reach of children!
- Brake failure can resu lt from o ld or inap­
propriate brake flu id. Observe these pre­
cautions:
- Use only brake f luid that meets SA E
specifica tion
J 1 7 03 and conforms to
Federa l Moto r Ve hicl e Standard 1 16.
Always check with yo ur authorized Aud i
dealer to make sure yo u are using the
correct brake fluid. The correct type of brake f lu id is also ind icated on the
brake flu id reservoir.
- The brake fluid must be new. Heavy use
of the brakes can cause a vapor lock if
the brake fluid is left in the system too
l ong. This can seriously affect the effi­
c iency of the brakes as well as your
safety. This cou ld resu lt in an accident.
(D Note
Brake fluid will damage the paint of your
vehicle .

@ For the sake of the environment
Because of the problem of proper disposal
of brake fluid as we ll as the special tools
req uired and the necessary expert ise, we
recommend that you have the brake fluid
changed by your author ized Audi dealer.
Battery
General information
All work on the battery requires technical
knowledge!
F ig . 1 64 Eng ine co mpa rtment: Batte ry w it h cover*
The battery is located in the engine compart­
ment
c::> fig. 164 and is near ly m ain te nance­
fre e.
The condition of the battery is checked in the
framework of the inspection.
Disconnecting the battery
The batte ry should not be disconnected. Some
ve hicl e functions such as power windows are
unavailable if the battery termina ls are dis­
connected. These funct ions have to be re­
l earned after the battery term inals are con­
nected aga in. To prevent this, the battery
should only be disconnected from the vehicle
electrical system if absolutely necessary .
Function
Power window
one-touch up/
down function
Master key with
remote control
Reprogramming
c::, page 45, Reactivating
the system after battery
disconnection
Synchronization
~page 38
Checkin g and fillin g 207
Reprogramming
Digita l clock c::, page 11
ESP indicator light The indicator ligh t goes
out after driving a few
meters
Vehicl es not driven for long periods and
sho rt -d is tance op eration
If you do no t drive your vehicle for several
days or weeks, electrical consumers are grad ­
u ally scaled back or switched off . This reduces
energy use and ensures the vehicle will be
able to start after long periods of time
c::, page 167. Some convenience functions
such as opening w it h the remote control key
may not be available. These conve nience func­
tions wi ll be available again once you switch
the ignit io n on and sta rt the engine. Even
whe n consume rs a re switched off, the battery
will become deeply discharged by stand -by
power consumers if the vehicle is not driven
for several months . Deep discharging results
in a chemical reaction that destroys the inside
of the battery. The battery must be charged
every month to prevent th is
c::, page 209. Do
not disconnect the battery or the anti-t heft
alarm system* will not work .
Winter operation
Cold weather places higher demands on the
battery. This results in reduced starting abili­
ty. Have the battery checked and recharged if
necessary befo re the cold weather begins.
Avoid unnecessary power consumpt ion, par­
ticularly in city traffic or when traveling only
short distances . Let your authorized Audi
dealer check the capacity of the vehicle bat­
tery before winter sets in
c::, page 209 . A well
c harged bat tery will not o nly prevent s tarti ng
problems when the weather is cold, but will
also last longer .
(D Note
-All wo rk on the batte ry requ ires techn i­
cal know le d ge. P lease con ta ct an Audi
dealership or another authorized fa cility
lill>