2018 AUDI A5 COUPE check engine

Checking and Filling
any circ umstances. Immediately contact the
nearest author ized Audi dealer or author­
i zed Audi Service Facility for assistance .
These fuels contain substances that can se­
verely damage the fue l system and the en­
gine if the engine is started .
Refueling
Fuel filler neck
The fuel fille r neck is located on the right rear
s ide pan el behind the fu el filler flap .
I f the power locking system should fail, you can
still open the flap manua lly
-for detai led instruc­
tions see
c::> page 326.
You can find the fuel tank capac ity of you r vehicle
in
c::> page 388 .
The label on the inside of the fuel filler flap tells
you the correct fue l for your vehicle . For more in­
formation about fue l specifications , see
c::> page 322 .
Your veh icle fuel tank has an onboard refuelling
vapor recovery system . This feature he lps to pre­
ve nt fuel vapors from escap ing from the tank and
pollut ing the e nvironment while yo u re fuel your
veh icle. In order to fi ll the tank properly while
protecting the environment, please fo llow this
r e fu eling procedure carefu lly.
& WARNING
Under normal operating conditions, never car­
ry additiona l fuel containers in yo ur car. Gas
canisters and other conta iners used to trans­
port fuel can be dangerous . S uch containers,
full or empty , may lea k and could cause a fire
in a collision. If yo u m ust t ransport fue l to
use for yo ur lawn mower, snow blower, etc.,
be very careful and a lways obse rve loca l and
state laws regard ing the use, t ransportation
and sto rage of such fue l conta iners. Make cer­
tain the container meets industry standards
(ANSI/ASTM F852
-86).
(D Note
Never drive your vehicle unt il the fuel tan k is
comp letely empty . The irregular supply of
324
fu el can cause misfiring. Gasoline could ente r
the exhaust system and damage the catalytic
converter.
Fueling procedure
F ig . 2 6 8 Righ t rea r side of th e vehicl e: op enin g the fue l
fi ller door
Fig. 269 Fuel fille r doo r wit h attached fuel c ap
The fuel filler doo r is unlocked or locked by the
cent ral lock ing system .
Opening the fuel cap
.. Press the left side of the fuel f iller doo r to open
i t
c::> fig. 268 -arrow-.
.. Unscrew the tank cap counterclockwise .
.,.. Place the cap from above on the open fuel filler
door
c::> fig . 269 .
Closing the fuel cap
.. Turn the fuel cap to the right until it stops.
.. Close the fuel filler door until i t latches.
Onc e the pump noz zle sw itches
off, the fuel tank
is "full ". Do not fill the tank more . Otherwise the
expans ion space in the tank w ill be filled.
The correct fuel type fo r your ve hicle can be
fo und o n a label located on the inside of the f uel
IJJ,

This message appears when there is only enough
Ad Blue left to drive the distance indicated in the
i nstr ument cluster . Fill the Ad Blue .
• Refill with at least x qt (l) AdBlue. No en·
gine start in
x mi (km ). See owner 's manual
This message appears when there is only eno ugh
Ad Blue lef t to d rive the distance indicated in the
i nstr ument cluster. Fill the Ad B lue. O therwise
the engine will not start again if you stop it once
the distance indicated has been driven .
• Refill with at least x qt (l) AdBlue . Engine
start n ot possibl e. See owner 's manual
This message appea rs when the Ad Blue tank is
empty. Fill the AdB lue. Otherwise you will not be
ab le to s tart the engine aga in once yo u stop it.
The AdBlue must be refilled when the amount in
the tank has reached the minimum level
¢ page 327, Preparation.
Incorrect filling /system ma lfunction
A message appears if the Ad Blue tank was filled
with a fluid other than AdBlue and the system
has detected that the tank was f illed incor rectly,
or if there is a system malfunction .
II Ad Blue: malfunct ion ! No engine start in
x mi (km ). Se e owner's manual
This message appears when it is only possible to
drive the d istance ind icated in the instrument
cluster . Drive to the nearest author ized Audi
dealer o r authorized Aud i Serv ice Facility to have
the malfunction corrected . Otherwise the engine
w ill not start again if you stop it once the d is­
tance indicated has been dr iven .
• Ad B lu e: malfunction! No engine start poss i­
ble . See owner' s manual
This message appears if the system has detected
that the tank was filled incorrectly or that there
is a malfunction . Drive immediately to the near ­
est autho rized Aud i dea ler or authorized Aud i
Service Facility to have the malfunction correct­
ed. Othe rwise you will not be able to start the en­
g ine again once you stop i t.
Checking and Filling
Preparation
Applies to: vehicles with selective cata lytic reduction
Fig. 272 R ight rear s ide o f th e ve hicle: removing t he Ad Bl­
u e cap
The Ad Blue tank ope ning is located near the d ie­
se l tank opening. Add at least the amount of
AdB lue shown in the instrument cluster display.
This is the minimum amount required to ensure
the system detects the refilling and to start the
engine. You can add a maximum of 6.3 gallons
(24 L).
Requirement: the request to add Ad Bl ue must
appear in the instrument cluster display.
.. Switch t he ignit ion off .
.. Open the tank filler door¢ page 324 .
.. Turn the ta nk filler neck cap to the left to re­
move
¢fig . 272.
.. Refill Ad Blue us ing a pump noz zle ¢ page 328,
a canister ¢ page 328 or a bott le ¢ page 328 .
A WARNING ,~ -Ad B lue can irritate the s kin, eyes and respira­
tory sys tem.
If th ere is contact with t he flu id,
flus h immed iate ly w ith plenty of wa ter. Con­
su lt a phys icia n if necessary .
(D Note
- Only use Ad Blue that conforms to the
standard ISO 22241-1. Do not m ix any addi­
tives with the Ad Blue and do not dilu te it
w ith wate r.
- Do not add AdBl ue to the diesel tank or add
diese l fuel to t he A d Bl ue tank. Do not s tart
t he engine un de r any c ircumst ances if th e
wrong fuel is filled in the tan k. There is a
327

Checking and Filling
risk of damaging the fuel tank system and
the engine. See an authorized Audi dealer or
authorized Audi Service Facility for assis­
tance.
- Ad Blue attacks surfaces such as painted ve­
hicle components, plastic and carpet. Re­
move the fluid as quickly as possible with a
damp cloth and plenty of cold water. If the
Ad Blue has already crystallized, use warm
water and a sponge . AdBlue residue that is
not removed will crystallize and can damage
the affected surface.
- Do not store refill bottles or canisters per­
manently in the vehicle. If the container
leaks, the escaping AdBlue could damage
the vehicle interior.
- Do not allow AdBlue to come into contact
with clothing. If there is contact with the
fluid, flush immediately with plenty of wa­
ter.
(D Tips
Follow the Ad Blue manufacturer 's instruc­
tions for use and storage.
Refilling AdBlue using a pump
Applies to: veh icles with selective catalyt ic reduction
.,. Open the tank filler door c::> page 324, fig. 268.
.,. T urn the tank filler neck cap to the left to re­
move
c::> page 327 , fig . 272.
.,. Refill Ad Blue until the pump noz zle switches
off for the first time
c::> (D .
.,. Close the filler neck . c::> page 329, Completing
AdBlue refill
(fl Note
- The pump nozzle handle must be pointing downward when filling. Otherwise the pump nozzle will not switch off automati­
cally
c::> Q) in Preparation on page 32 7.
- Do not continue filling once the pump noz­
zle automatically switches off for the first
time. The AdBlue tank system could be
overfilled and leak Ad Blue
c::>(D in Prepara­
tion on page 327.
328
Refilling AdBlue using a canister
Applies to: vehicles with selective cata lytic reduction
®
+®
Fig. 273 Caniste r w ith attachable hose
.,. Remove the cover from the refill canis ter c::> A
in Preparation on page 3 27, c::>(D in Prepara ­
tion on page 32
7 .
.,. Secure the end of the hose (D on the opening in
the canister @by turning the hose to the right.
.,. Remove the cap@from the other end of the
hose @ .
.,. Position the end of the hose @on the filler
neck in the vehicle and turn the hose to the
right to tighten it .
.,. Lift th@ canister up and then tip it. Continue
holding the canister in a tipped position until it
is empty or until no more fluid flows into the
tank .
.,. Remove the canister and close the filler tube
c::> page 329, Completing AdBlue refill .
(D Note
Only use refill canisters that are approved for
your vehicle. Using other systems can cause Ad Blue to leak .
(D Tips
-An authorized Audi dealer or authorized
Audi repair facility can tell you which refill
canisters are approved for your vehicle .
- A permitted refill canister contains approxi­
mately 1.3 gallons (5 liters) of Ad Blue.
Refilling AdBlue using a bottle
Applies to: vehicles with selective catalytic reduction
.,. Remove the cap from the refill bottle c::> A in
Preparation on page 327,
c::> (D in Preparation
on page 327.
..,.

Check ing and F illing
Engine compartment
Working in the engine compartment
Special care is required if you are working in the
engine compartment
Fo r wo rk in th e engine compa rtmen t, s uch as
c h ec kin g and filli ng flu id s, th ere is a risk of in­
j u ry, sc aldin g, ac cide nts, a nd b urn s. For this
rea son, foll ow all the warning s and gener al
s a fe ty p recaution s pr ov ided in the f ollow ing in·
f o rm ation . Th e en gine c omp artmen t is a dan ­
ger ous are a.
q ,&.
_& WARNING
- T urn the engine off.
- Switch the ign ition off .
- Set the parking brake .
- Shift the gearshift lever to neutral in vehicles with a manual transm ission and se­
lect the P selecto r lever pos ition in vehicles
with an automatic transmission.
- Let the engine coo l down .
- Never open the hood when there is steam or coolant escaping from the eng ine compart­
ment, because there is a risk that you cou ld
be burned. Wait until no steam or coolant is
escaping.
- Keep ch ildren away from the engine com­
partment.
- Never spill f lu ids on a hot engine. These flu­
ids (such as the anti-freezing agent con­
ta ined in the coolant) can ignite .
- Avoid sho rt circu its in the electrical system.
- Whe n working in the engine compartment ,
remember that the rad iator fan can sw itch
on even if the ign ition is switched off, which
increases the risk of in jury.
- Never open the cap on the coolant expan­
sion tank when the eng ine is warm. The
cooling system is under pressure.
- T o protect your face, hands, and arms from
hot steam or coolant, cove r the cap with a
large cloth when opening .
- Do not remove the engine cover under any
c ircumstances. This increases the risk of
burns .
330
-If tests need to be performed with the en­
gine running, there is add itiona l danger due
to mov ing components (such as the r ibbed
belt, alternator and rad iator fan) and from
the high-voltage ignition system .
- Do not under any circumstances activate the
throttle inadvertently (for example, by hand
from the engine compartment) if the veh i­
cle is stat ionary but the eng ine is r unning
and a gear is engaged. Otherwise, the veh i­
cle will start to move immediately and this
could result in an acc ident.
- Pay attent ion to the following warnings
when work on the fue l system is required :
- Do not smoke.
- Never work near open flames.
-Always have a working fire extinguisher
nearby .
-All work on the battery or electrical system
in your vehicle can result in inju ries, chemi­
cal b urns, acc idents or burns. Because of
this, all work must be performed
onl y by an
author iz ed Audi dealer or authori zed Audi
Serv ice Facili ty .
-To reduce the r isk of e lectr ic shock and in­
jury, never touch the follow ing components
when the engine is running or is being start­ ed:
- Ign ition cable
- Other components in the electronic high- vo ltage ign ition system
- If you must che ck or perform wo rk on the
engine whi le it is running:
-First, set the parking brake and and move
the gearshift lever to neutral (for manual
transm issions) or select the P selector lev­
er posit ion (for automatic transm issions) .
- Always proceed with extreme caution so
that clothing, jewelry or long hair do not become caught in the rad iator fan, fan
belt or other moving components or do
not come into contact with hot compo­
nents. Tie bac k long hair befo re beginn ing
work and do not wear clothing that can
hang down into the engine.
-Lim it yo ur exposure to exhaust and chemi­
cals to as short a time as possible
q .&. .

,&_ WAR NING
California Proposition 65 Warning:
- Engine exhaust, some of its constituents,
and certain vehicle components contain or
emit chemicals known to the State of Cali­
fornia to cause cancer and birth defects and reproduct ive harm. In addition, certain flu­
ids contained in vehicles and certain prod­
ucts of component wear contain or emit
chem icals known to the State of California
to cause cancer and birth defects or other reproduct ive harm.
- Battery posts, terminals and related acces­ sories contain lead and lead compounds,
chem icals known to the State of California
to cause cancer and reproduct ive harms.
Wash hands after handling.
(D Note
When filling flu ids, be sure not to mix the flu­
ids up . Otherwise severe ma lf u nctions and en­
gine damage w ill occur.
@) For the sake of the environment
You shou ld regularly check the ground under
your vehicle in o rder to detect leaks qu ickly .
If
there a re visible spots from oil or other fluids,
bring your vehicle to an authorized Aud i dea l­
er or authorized Audi Service Facility to be
checked.
Opening and closing the hood
The hood is released from inside the vehicle.
Fig. 274 Driver footwell: release leve r
Checki ng an d Fill in g
Fig. 275 Unlocked hood : lever
Make sure the wiper arms are not raised up from
the windshield. Otherwise the paint could be damaged .
Opening the hood
" With the driver's doo r open, pull the lever be­
low the instrument panel in the direction of the
arrow
r:;, fig . 2 7 4.
" Ra ise the hood slightly ¢.&_ .
"Press the lever ¢ fig. 275 in the direct ion of the
arrow. This releases the hooks .
"Open the hood .
Closing the hood
" Push the hood down until you override the
force of the str uts.
" Let the hood fall lightly into the latch . Do not
press it
in. ¢ .&_ .
A WARNING ,..___
-Never open the hood when there is steam or
coo lant escaping from the engine compart ­
ment, because there is a risk that you could
be burned. Wait until no steam or coolant is
escaping.
- For safety reasons, the hood must always be
closed securely while driv ing. Because of
this, always check the hood after closing it
to make sure it is latched correctly . The
hood is latched if the front corners cannot
be lifted.
- I f you notice that the hood is not latched
while you are d riving, s top immed iately and
close it, because driving when the hood is not latched increases the r isk of an accident . .._
331

Checking and Filling
-If the hood is not latched completely, it
could fly up while you are driving and ob­
struct your vision.
Engine compartment overview
The most important check points.
Fig. 276 Typ ical location of the reservoir and the engine o il filler o penin g
@ Washer fluid reservoir (W) c:> page 339
@ Jump start po int( +) under a cover,(-) w ith
hex head sc rew
c:> page 339 c:> page 381
@ Engine oil filling open ing ( page 334
© Eng ine oil label* w ith VW standard
c:> page332
® Coolant expansion tank (- L) c:> page 336
® Brake fluid reservoir ((0)) c:> page 33 7
The location of the engine oil fill ing opening and
the coolant expansion tank
c:> fig. 2 76 (items @
and@) may differ depending on the engine ver­
sion .
332
8,_ WARNING
Read and follow all WARNINGS befo re check­
ing anything in the engine compartment
c:>page330.
Engine oil
Engine oil specifications
The engine oil used must conform to exact speci ­
fications.
The serv ice interval d isplay i n the instrumen t
clus ter o f your veh icle will inform you when it is
time for an o il change . We recommend that you
have your oi l changed by an author ized Audi Serv-
ice Advisor.
..,_

<( a, .... N ,....
N .... 0 \0
3 a,
If you must add oil between oil changes, use an
oil that matches the Audi oil quality standard listed on the st icker. The sticker is located at the
front of the engine compartment
c> page 332,
fig . 276.
Audi re comm end s
Ocastrot /[g/j;t{E'g Frtw.::<.. ·-:dr,,JA.L
A ud i recommends Longlife h igh perform ance
e ngin e oil from Audi Genui ne Part s
Using the proper engine oil is important for the
functionality and service life of the eng ine. Your
engine was factory -filled with a high-quality oil
which can usua lly be used throughout the entire
yea r.
Note
Your Limited New Vehicle Warranty does not
cover damage o r malfunctions due to failure
to follow recommended maintenance and use requirements as set fo rth in the Aud i Owner's
Manual and Warranty
& Maintenance booklet.
- Use only a high q ual ity eng ine oil that ex-
pressly complies with the Aud i oil q uality
standard specified for your vehi cle's engine .
Using any other oil can cause serious engine
damage .
- Do not mix any l ubricants o r 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 ­
b le that meets the Audi oil quality standard
your eng ine requires, you may add a total of
no more than 0.5 qt (0.5 l) of a h igh-quality
"synthet ic" o il that meets the following speci­
fications .
- Vehicles with gasoline eng ine: ACEA A3 or
API SM with a viscosity grade of SAE OW-30,
SAE 5W -30 or SAE 5W-40 .
- Vehicles with d iesel eng ine : ACEA C3 or
API CF with a v iscosity grade of SAE OW-30
or SAE 5W -30 .
- For more information about engine o il that
has been approved for your vehicle, please
contact e ither you r authorized Audi dea le r
or A udi C ustome r Relat ions at
Ch eck ing and Filling
1 (800) 822 -2834 or visit our web site at
www.audiusa .com or www .audicanada .ca.
Engine oil consumption
The engin e in your v ehicl e dep ends on an ad e­
quat e amount of oil to lubricate and cool all of
its moving parts.
In order to provide effect ive lub rication and cool­
ing of inte rnal engine components, all inte rnal
combustion engines consume a certain amount
of oil. Oil consumption varies from eng ine to en­
gine and may change significantly over the life of
the engine. Typ ically, engines w ith a specified
break -in period (see
c> page 86) consume more
o il dur ing the break-in per iod than they consume
after oil consumption has stabilized .
Under normal cond itions, the rate of oil con­
sumption depends on the qua lity and viscos ity of
the oil, the RPM (revolutions per m inute) at
which the engine is operated, the amb ient tem­
perature and road condi tions. Further facto rs a re
the amo unt of oil di lution from water co ndensa­
tion or fue l resid ue a nd the oxidation level of the
oi l. As any engine is subject to wear as mileage
builds up, the oi l consumption may increase ove r
time unt il replacement of worn components may
become necessary.
With a ll these variab les coming into play, no
standard rate of oi l consumption can be estab­
lished or spec ified . There is no alternative to reg­
ular and frequent checking of the oi l level, see
Note .
If the y ellow engine oil leve l warning symbo l Bl
in the instrument cluster lights up, you should
check the o il level as soon as possible
c> page 334. Top off the o il at your earliest con­
venience
c> page 334 .
A WARNING
--Before you check anyth ing in the eng ine com-
partment, always read and heed all WARN­
I NGS
c> .&. in Working in the engine compart-
ment on
p~e 330. ~
333

Check ing and F illing
CJ) Note
Driving with an insufficient oil level is likely to
cause severe damage to the engine .
@ Tips
-The oil pressure warn ing display. i s not
an ind icato r of the oil l evel. Do not rel y on
it. In stead , che ck th e oil le vel in your e n­
gi ne a t regul ar int ervals, prefe rably e ach
t ime you re fuel , and al ways befo re go ing
on a long trip .
-If you have the impression your engine con­
sumes excessive amounts of oil, we recom­
mend that you consult an authorized Aud i
dealer to have the cause of your concern properly d iagnosed . Keep in mind that the
accurate measurement of oil consumpt ion
r equi res great ca re and may take some
time. An authorized Audi dealer has instruc­
tions about how to measure oil consump­
tion accurately.
Checking the engine oil level and adding
engine oil
The engine oil level can be checked in the Info­
t ainmen t sys tem
F ig . 277 Engin e co mpartme nt: e ngine o il fille r ope ning
c ove r
Checking th e engine oil l evel
-Park t he vehicle on a leve l surface .
-Sh ut the engine off when it is warm.
0 N
-N
>< (X) IX)
-Switc h only the ignition back on. Wa it approxi-
mately two minutes so that the engine oil can
flow back into the oil pan.
334
-Select in the Infotainment system: the ! MENUI
button > V ehicle > l eft control button > Se rvice
& ch ec ks > Oil level.
-Check the oil level in the Infotainment system
disp lay . Add engine oi l if the bar in the oil level
indicator is just before
"m in".
Adding engine oil
Fo llow the safety precautions r:';> Li::. in Working in
the engine compartment on page 330.
-Stop the engine and open the hood
<:';> page 331 .
-Unscrew the cap 9=;,1 on the engine oi l filling
open ing
r:';> fig. 277, <:';>page 332.
-Carefully add 0.5 quart (0.5 liter) of the correct
oil
r:';> page 332 .
-Close the eng ine oil filler opening cap.
-Close the hood, restart the ignit ion after two
m inutes and read the current o il level in the In ­
fotainment system.
&_ WARNING
-When adding oil, do not let oil dr ip onto hot
engine components.
This i nc reases the risk
of afire.
-You must secure the cap on the oil fi ller
open ing correctly so that oil does not leak
ou t onto the ho t engine and exhaust system
when the engine is running, beca use this is
a fire hazard .
- Always clean skin thoroughly if it comes into
contact with engine oil.
(D Note
-The engine o il level must not be under the
" min" marking, because this incre ases the
risk of engine damage.
-If the message II Pl ea se redu ce oil lev el
appears, there is too much oil in the eng ine
and there is a risk of damaging the cata lytic
converter and engine. Do not start the en­
gine . Contact an authorized A udi dealer or
authorized Audi Service Fac ility to have ex­
cess engine o il extracted if necessary .
- Do not mix any add it iona l lubricants into
the engine oil. Damage caused by such add i­
t ives is not covered by the warranty.
...