2016 AUDI S6 check engine light

....
Audi oil quality standard
Gas oline
VW 502 00 or
engi ne vw 504 00
Die sel vw 507 00
en gin e
Using the prope r engine oil is important for the
functiona lity and service life of the eng ine. Your
engine was factory-filled with a high -quality oil
which can usually be used throughout the entire
year.
@ Note
Your Limited New Vehicle Warranty does not
cover damage or malfunctions due to failure
to follow recommended maintenance and use
requirements as set forth in the Audi Owner's Manual and Warranty
& Maintenance booklet.
- Use only a high quality eng ine oil that ex-
pressly complies with the Aud i oil quality
standard specified for your vehicle's engine.
Using any other oil can cause serious engine
damage .
- Do not mix any lubricants or other additives
into the engine oil. Doing so can cause en­
gine damage.
(D Tips
If you need to add oil and there is none availa­
ble that meets the Audi o il quality standard
your eng ine requ ires, you may add a total of
no more than 0.5 quart/liter of a h igh-quality
"synthet ic"oil that meets the followi ng speci­
fications.
- Vehicles with gasoline eng ine: AC EA A3 o r
API SM wi th a viscosity g rade of SA E OW-30,
SAE SW-30 or SAE SW-40.
- Vehicles wit h diesel eng ine: ACEA C3 o r
API CF with a v iscosi ty grade of SA E OW-30
or SA E SW -30.
- Fo r more information abou t engine o il that
has been approved for your vehi cle, please
contact either you r a utho rized Audi dea ler
or A udi Customer Relations at
"' 1 (800) 822-2834 or visit our web site at
0
~ www.audiusa.com or www.aud icanada.ca.
.... M Ch eck ing and Filling
Engine oil consumption
The engine in your vehicle depends on on ade­
quate amount of oil to lubricate and cool oil of
its moving ports.
In order to provide effect ive lubrication and cool­
i ng of internal engine components, all internal
combust ion eng ines consume a certa in amount
of oil. Oil consumption varies from eng ine to en­
gine and may change s ign ificantly ove r the life of
the engine. Typ ica lly, engines w ith a specified
break-in period (see
¢ page 194) consume more
oi l during the break -in period than they consume
after oil consumption has stabilized.
Under normal cond itions, the rate of oil con­
sumption depends on the q uality and viscosity o f
the oil, the RPM (revol utions per minute) at
which the engine is operated, the ambient tem­
perature and road condit ions. Further factors are
the amount of oil dilution from water condensa­
tion or fuel residue and the oxidation level of the o il. As any engine is subject to wear as mileage
builds up, the oil consumption may increase over
time unt il replacement of worn components may
become necessary.
With all these variables coming into play, no standard rate of o il consumption can be estab­
li shed or spec ified . T he re is no alte rnative to reg­
u la r and frequent checking of the oi l level , see
Note .
If the yellow engine o il leve l warning symbo l in
the instrument cluster
II lights up, yo u should
c h eck the o il level as soon as possible
¢ page 220. Top off the o il at your earlies t con­
venience
¢ page 220.
A WARNING
--=-
Before you check anything in the engine com-
partment, always read and heed all WARN­
INGS
¢ &. in Working in the engine comport­
ment on page 216.
(D Note
Driving wit h an insufficient oil level is likely to
cause severe damage to the eng ine.
IJJ,,
219

• Park your vehicle on a level surface.
• Switch
off the ignition.
• Read the engine coolant level from the coolant
expansion tank¢
fig. 189, ¢ page 218,
fig. 186.
With a cold engine, the coolant level
should be between the "min" and "max" mark­
i ngs . When the engine is warm, the level may
be s light ly above the "max " marking.
The location of the coolant expans ion tank can be
seen in the engine compartment illustrat ion
¢pag e 218.
To obtain an accurate reading, the engine must
be sw itched
off.
The expansion tank in your vehicle is equipped
with an electric coolant level sensor.
When the coo lant level is too low, the warning
light in the Auto-Check System
c:> page 15 wi ll il­
luminate until you add coolant and the level has
been restored to normal. Even though there is an
e lectric coolant level sensor, we still recommend
you check the coolant level from t ime to t ime.
Coolant loss
Coolant loss may indicate a leak in the cooling
system. In the event of coolant loss, the cooling
system should be inspected immediately by your
authorized Audi dealer. It is not enough merely
to add coolant.
In a
sealed system, losses can occur only if the
boiling point of the coo lant is exceeded as a re­
sult of overheat ing.
A WARNING
The cooling system is under pressure and can
get very hot . Reduce the risk of scalding from
hot coolant by following these steps.
- Turn off the eng ine and allow it to cool
down.
- Protect your face, hands and arms from es­
caping fluid and steam by covering the cap
with a large, thick rag.
- Turn the cap slowly and very carefully in a
counter-clockwise direction while applying
light, downward pressure on the top of the
cap.
Checking and Filling
-To avoid being burned, do not spill anti­
freeze or coolant on the exhaust system or
hot engine parts. Under certain cond itions,
the ethylene glycol in engi ne coolant can
catch fire.
(D Note
Do not add any type of radiator leak sealant
to your vehicle's engine coolant. Add ing radia­
tor repair fluid may adversely affect the func­
tion and performance of your cooling system
and could result in damage not covered by
your New Vehicle Limited Warranty.
Adding coolant
Be very careful when adding engine coolant.
Before you check anything in the engine compart­
ment,
always read and heed all WARNINGS
¢.&. in Working in the engine compartment on
page 216.
• Requ irement: There must be a residual amount
of coolant in the expansion tank
c:> (D .
•Turnoff the engine .
• Let the engine cool down.
• Place a thick rag over the coolant expans ion
tank
c:>p age 222 , fig. 189 and carefully twist
the cap counter-clockwise
c:> _& .
• Add coo lant mixed in the correct ratio
c:> page 222, Coolant up to the MAX marking .
• Make sure that the fluid level remains stable.
Add more coolant if necessary.
• Twist the cap on again
tightly.
Replacement engine coolant must conform to ex ­
act specifications
c> page 222, Coolant.
We recommend using only coolant additive Gl2+
+ , Gl3
or in an emergency Gl2+. Do not use a
different additive. In an emergency use plain wa­
ter until you can get the correct additive and can
restore the correct ratio. This should be done as
soon as possible.
If you have lost a considerable amount of coo l­
ant, then you should add cold antifreeze and cold
water only when the engine is co ld.
Always use
new engine coolant when refi lling.
223

Check ing and F illing
Do not fill coolant above the "MAX" mark. Excess
coo lant wi ll be forced out through the pressure
relief valve in the cap when the eng ine becomes
hot.
A WARNING
- The cooling system is under pressure and
can get very hot . Reduce the risk of scald ing
from hot coolant by followi ng these steps.
- Tu rn off the engine and allow it to coo l
down.
- P rotect your face, h ands and arms from
escaping f lu id and steam by cover ing the
cap with a large, thick rag.
- Tu rn the cap slowly and very carefully in a
co unter -clockw ise direction while applying
light, downward p ressure on the top of
the cap.
- To avoid being bu rned, do not spill anti­
freeze or coolant on the exhaust system or
hot engine parts. Under certa in condi­
tions, the ethylene glycol in eng ine cool­
a nt can catch fire.
- Antifreeze is poisonous. A lways store anti­
freeze in its original container and well out
of the reach of children .
- If you dra in the coolant, it must be ca ught
and sa fely stored in a proper conta iner
clearly mar ked "poison".
(D Note
- Do not add coolant if the expansion tank is
empty . A ir cou ld enter the cooling system
a nd damage the eng ine. If this is the case ,
do no t continue dr iving. Seek professional
ass istance .
- Coolant pollutes t he e nvironment a nd could
cause an eng ine fire . Excess coolan t will be
fo rced o ut through th e pressure relief valve
i n the c ap whe n the eng ine be comes hot.
- If, in an emergency, o nly wate r can be add­
ed, the co rrect ratio between wate r and an­
ti fr ee ze ~
page 222 mu st be resto red a s
soon as possib le.
224
-
® For the sake of the environment
D raine d coolant should not be re use d. Always
d ispose of used coolant while observing a ll
environmental regulations.
Radiator fan
The radiator fan switches on automatically by it­
self
An a uxiliary e lectric ra diator fan switches on and
off depending on coo lant temperature and other
vehicle ope rating conditions .
A ft er yo u sw itc h t he engi ne off, the a uxi liary fan
can con tinue running for up to 10 m inutes -even
with t he ignitio n off .
It can even switch on again
l ater by itself~& . if
- t he tempera ture o f the engine coolan t rises d ue
to the heat build -up from the engine in the en­
gine compa rtment, or
- t he engine compar tment heats up beca use the
vehicle is pa rked in intense s unlight.
A WARNING
- To red uce the r is k of personal injury never
to uch the radiator fan .
- The a uxiliary e lectric fan is temperat ure
controlled and can switch on s uddenly even
when the engine is not running.
-
- The a uxiliary radiator fan switches on auto­
mat ically when the eng ine coolant reaches a
certain temperature and will continue to run
until the coo lant temperature d rops.

.... N
0 CJ ' M I.Cl ......
Brake fluid
Checking brake fluid level
Fig. 190 Engine compartment : cover on t he brake fluid
reservoir
N
N
-N ,::
~
Before you check anything in the engine compart­
ment,
always read and heed all WARNINGS
¢ A in Working in the engine compartment on
page 216.
.,. Read the brake fluid level from the brake fluid
reservoir
¢fig. 190, ¢page 218, fig. 186. The
brake fluid level must be between the "MIN "
and "MAX" markings.
The location of the brake fluid reservoir can be
seen in the engine compartment illustration
¢page 218.
The fluid level may drop slightly after some time
due to the automatic adjustment of the brake
pads. This is not cause for alarm.
If the brake fluid level falls
considerably below
the "MIN" mark, the brake warning/indicator
light
1111 (U.S. models) ;II (Canadian models)
will come on¢
page 14. Do not continue to oper­
ate the vehicle. The complete brake system
should be thoroughly checked by an authorized
Audi dealer or other qualified facility and the
cause corrected. If the brake fluid level is too
low, the brake warning/indicator light will illumi ­
nate. Contact an authorized Audi dealer
immedi­
ately.
Checking and Filling
Changing brake fluid
Have the brake fluid changed by an experienced
technician .
Brake fluid absorbs moisture from the air. If the
water content in the brake fluid is too high, cor­
rosion in the brake system may result after ape ­
riod of time . The boiling point of the brake fluid
will also decrease considerably and decrease
braking performance.
Therefore, the brake fluid must be changed
every
two years . Always use new brake fluid which con­
forms to Federal Motor Vehicle Standard "FMVSS
116 DOT 4" .
The brake fluid reservoir can be difficult to reach,
therefore, we recommend that you have the
brake fluid changed by your authorized
Audi
dealer. Your dealer has the correct tools, the
right brake fluid and the know-how to do this for
you.
A WARNING
- Brake fluid is poisonous. It must be stored
only in the closed original container out of
the reach of children!
- Brake failure can result from old or inappro­
priate brake fluid . Observe these precau­
tions:
- Use only brake fluid that meets SAE speci­
fication
J 1703 and conforms to Federal
Motor Vehicle Standard 116. Always check
with your authorized Audi dealer to make
sure you are using the correct brake fluid.
The correct type of brake fluid is also indi­
cated on the brake fluid 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 long.
This can seriously affect the efficiency of
the brakes as well as your safety. This
could result in an accident.
(D Note
Brake fluid will damage the paint of your vehi-
cle.
IJ>
225

Check ing and F illing
@ For the sake of the environment
Because of the prob lem of proper disposal of
brake fluid as we ll as the special tools re­
quired and the necessary expertise, we rec ­
ommend that you have the b rake fluid
changed by your author ized Audi dealer .
Battery
General information
Under normal operating conditions, the battery
in your Audi does not need any maintenance.
W ith
high outside temperat ures or long da ily
drives we recommend that you have the electro­
lyte level checked by a service fac ility . The elec­
trolyte level should also be chec ked eac h time
the battery is charged ¢
page 228 .
Have the battery checked when you take your ve­
h icle in for service. You a re well advised to re­
p lace a battery t hat is o lder than S years .
W ith certain types of a irbag dep loyment, the
battery is disconnected from the vehicle electr i­
cal system for safety reasons
¢ &. in Repair, care
and disposal of the airbags on page 157 .
Disconnecting the battery terminal s
Some vehicle functions (power window reg ula­
tors, for example) are lost i f th e battery termi ­
na ls are disconnected. These functions have to be
relearned after the battery termina ls are con­
nected aga in. To prevent th is , the batte ry shou ld
only be disconnected from the vehicle e lectr ica l
sys te m when abso lutely ne cessary for repairs.
Vehicles not driven for long periods
If you do not drive your vehicle over a period of
seve ral days or weeks, electrical components a re
gradua lly cut back or sw itched off . T hi s reduces
e n ergy cons umption and ma inta ins starti ng ca­
pab il ity over a longer pe riod
¢ page 192. Some
of the conve nience f unct io ns may not o pera te,
such as the inter io r lig hts or powe r seat a dju st­
ment . The convenience funct ions wi ll be avai lab le
again when you switch on the ignition and start
the engine.
226
Winter operation
Dur ing the winte r mon ths, ba ttery c apacity tends
to decrease as tempe ra tu res drop . This is be ­
ca use mo re power is also consume d while start ­
i ng, and the headlights, rear window defogger,
etc., are used more often.
Avo id unne cessary powe r consum ption, pa rticu­
l arly in city traffic or when traveling on ly short
distances . Let your author ized Audi dealer check
t h e capacity of the vehicle battery before winter
sets in~
page 228. A we ll charged battery will
not only p reve nt sta rting prob lems when the
weather is cold, but will also last longer.
(D Tips
If yo ur vehicle is left standing for several
weeks at extreme ly low temperatu res, the ve­
hicl e battery should be re m oved a nd stor ed
where it will not freeze. This w ill preven t it
fro m bei ng damaged and hav ing to be re­
p lac ed .
Working on the battery
Be e specially car eful when working on or near
t he bat tery.
The battery is loca ted in the luggage com part­
ment under the floo r. Befo re yo u check anything
i n the luggage compa rtment,
read and heed all
WARNINGS ¢
.cl·
Always heed the safety warnings , when working
o n the vehicle ba tte ry o r the veh icle elect rical
system to p reve nt injury.
The following WARNINGS are very important
when working on the battery:
Always heed the following WARNING SYM·
BOLS and safety precautions when working on
the battery.
®
Always wear eye protection.
A
Battery acid contains sulfuric acid . Al-
ways wear gloves and eye protection.

@
No
• sp ark s
• fl ame s
· sm oki ng .
&
Wh en a battery is charg ed , it produces
h yd rogen ga s which i s ex plosi ve and
c o uld c au se p ers onal injury .
®
Always keep the b atter y well out of
rea ch of child ren.
A WARNING
Whenever working on the battery or on the
electrical system, there is the risk of injury,
accident and even fire. Read and heed the fol­
lowing WARN INGS:
- Always wear eye protection. Do not let bat­
tery a cid or any lead pa rticles get on your
sk in or cloth ing. Sh ield your eyes. Exp losive
gases can cause blindness or other injury .
- Battery acid contains su lf ur ic ac id. Sulfur ic
acid can cause blindness and severe b urns.
-Always wear gloves and eye protection. Do
not tilt the battery because acid could leak
out of the ventilat ion open ings.
- If you get battery ac id in your eyes or on
your skin, immediately rinse with co ld wa­
ter for seve ral minutes and get medical at·
tention .
- If you should ingest any battery acid, seek
medical attention immediately .
- Do not expose the battery to an open flame,
electric sparks or an open light.
- Do not smoke.
- Do not interchange the positive and nega -
tive cab les.
- When working on the battery, be sure not to
short-c ircuit the terminals with tools or oth­
er meta l objects. Th is wou ld cause the bat­
tery to heat up very quickly, which could
lead to damage or explosion and persona l
injury.
- When a battery is charged, it produces hy­
drogen gas which is explosive and could
cause pe rsonal injury.
- Always keep the battery well out of the
reac h of ch ildren .
-
Check ing and Filling
-Before work is done on the electrical sys­
tem, disconnect the negat ive ground cable.
- Before performing any work on the electri­
cal system, switch off the engine and igni­
tion as well as any electrical equ ipment. The
negat ive cable on the battery must be dis­
connected . If you are just going to replace a
light bulb, then it is enough to switch off
the lights.
- Before d isconnecting the battery, switch off
the anti-theft a larm system! Otherwise you
will set off the alarm.
- When disconnecting the battery, first dis­
connect the negat ive cable and then the
positive cable.
- Before reconnect ing the battery, make sure
all electrical consumers a re switched off.
Reconnect the positive cable first and then
the negative cable. Never in terchange the
cables -this could start a fire !
- Never cha rge a froze n or a thawed-out bat ­
t ery . It co uld explode! If a battery has fro­
zen, then it must be replaced. A discharged
battery can freeze over at 32 °F (0 °C).
- Make sure the vent hose is always attached to the opening on the side of the battery.
- Never use batteries which are damaged.
There is the danger of an exp losion! Always
replace a damaged battery .
A WARNING ,_____
California Proposition 65 Warning:
- Ba ttery posts, term inals and related acces ­
sories contain lead and lead compounds,
chemicals known to the State of California
to cause cancer and reproductive prob lems.
Was h hands after handling.
(D Note
- Do not disconnect the vehicle battery when
the ignition is on or when the engine is run­ ning, otherwise, you w ill damage electronic
components in the electrical system.
- If your ve hicle is go ing to stand for a long
period of time w ithout being driven, protect
the battery from "freezing", otherwise it .,..
227

(D Note
Never use a fast charger as a booster to start
the engine . This will serious ly damage sensi­
tive electronic components, such as control units, relays, radio, etc., as well as the battery
charger.
Battery replacement
The new battery must have the same specifica­
tions and dimensions as the original equipment
battery .
Intelligent energy management in your vehicle is
responsible for distributing the electrical energy
throughout your vehicle
¢ page 192 . The intelli ­
gent energy management system w ill keep the
engine battery charged better than vehicles with­
out this system . To make sure the addit ional
e lectrica l energy is available once again after you
have changed the battery, we recommend that
you install batteries of the same type and manu­
facture only (the same as those installed at the
time your veh icle was delivered). Specifications
are listed on the battery housing. Your author­
ized dealer must code the battery in the energy
management system to enable you to use the en­
ergy management functions correctly after re­
p lacing the battery .
The new battery must have the same capacity,
voltage (12-volts), amperage, construction and
plug sealing .
When installing the battery, make sure the igni­
tion and all electrical consumers are sw itched
off.
(D Note
Make sure the ventilation hose on the side of
the battery is connected, otherw ise fumes or
battery acid can leak out.
- Vehicles with the Start-Stop-System* are
equipped with a special cycle-proof AGM
battery . Install ing a different type of bat­
tery can cause prob lems in the vehicle elec­
trical system. When replacing the vehicle
battery, always install one with the same
specifications as the original battery.
Checking and Filling
{® For the sake of the environment
Because of the problem of proper disposal of
a battery, we recommend your authorized
Audi dealer change the battery for you. Bat­
teries contain sulfur ic acid and lead and must
always be disposed of properly in compliance
with all environmental regulations. Disposing
of veh icle batteries improperly is very danger­
ous to the environment .
Windshield/head Light
washer container
Fig. 192 Eng in e compar tment: cover on the windshie ld
and head light * washer fluid reservoir
The washer fluid container is marked with the
symbol~ on its cap
¢fig. 192, c:;,page 218,
fig. 186 .
.. Before you check anything in the engine com­
partment,
always read and heed all WARN­
INGS c::;, A in Working in the engine compart­
ment on page 216.
.. Lift the filler cap tongue to add washer fluid .
You can fill the container to the top .
.. Press the cap back onto the filler neck after fill-
ing the container .
You can find the reservoir
capacity in the table in
¢page 271.
Clean water should be used when filling up. If
possible, use soft water to prevent scaling on
washer jets. Always add a glass cleaner solution
(with frost protection in the winter) . ..,.
229

Emergency situations
Emergency situations
General
This chapter is intended for trained emergency crews and working personnel who have the nec­
essary tools and equipment to perform these
operations.
Starting by pushing or
towing
CD Note
Vehicles with an automatic transmission can­
not be started by pushing or towing.
Starting with jumper
cables
If necessary, the engine con be started by con­
necting it to the battery of another vehicle .
If the engine should fail to start because of a dis­
charged or weak battery, the battery can be con­
nected to the battery of
another vehicle, using a
pair of jumper cables to start the engine.
Jumper cables
Use only jumper cables of sufficiently large cross
section
to carry the starter current safely. Refer
to the manufacturer's specifications.
Use only jumper cables with
insulated terminal
clamps which are distinctly marked :
plus(+) cable in most cases colored red
minus(-) cable
in most cases colored black .
A WARNING
Batteries contain electricity, acid, and gas.
Any of these can cause very serious or fatal in­
jury. Follow the instructions below for safe hand Ling of your vehicle's battery .
-Always shield your eyes and avoid leaning
over the battery whenever possible.
-A discharged battery can freeze at tempera­
tures just below 32 °F (0 °C). Before con­
necting a jumper cable, you must thaw the
264
frozen battery completely, otherwise it could explode .
- Do not allow battery acid to contact eyes or
skin. Flush any contacted area with water immediately.
- Improper use of a booster battery to start a
vehicle may cause an explosion.
- Vehicle batteries generate explosive gases.
Keep sparks, flame and lighted cigarettes
away from batteries.
- Do not try to jump start any vehicle with a
low acid level in the battery .
- The voltage of the booster battery must also
have a 12-volt rating. The capacity (Ah) of
the booster battery should not be lower
than that of the discharged battery. Use of
batteries of different voltage or substantial­
ly different "Ah" rating may cause an explo­
sion and personal injury .
- Never charge a frozen battery. Gas trapped in the ice may cause an explosion .
- Never charge or use a battery that has been
frozen . The battery case may have be weak­
ened .
- Use of batteries of different voltage or sub­ stantially different capacity (Ah) rating may
cause an explosion and injury. The capacity
(Ah) of the booster battery should not be
lower than that of the discharged battery.
- Before you check anything in the engine
compartment, always read and heed all
WARNINGS
~page 216.
CD Note
-Applying a higher voltage booster battery
will cause expensive damage to sensitive
electronic components, such as control
units, relays, radio, etc.
- There must be no electrical contact between
the vehicles as otherwise current could al­
ready start to flow as soon as the positive
(+) terminals are connected.
@ Tips
The discharged battery must be properly con-
nected to the vehicle's electrical system. .,.