2018 AUDI TT ROADSTER check engine light

Assistance systems
Messages
App lies to: ve hicles w ith Aud i side ass ist
If th e side assist sw itches off automatically, a
message appears in the Infotainment system dis­
p la y.
@j Audi side assist: currently unavailable.
Sensor vision restricted due to surroundings.
See owner's manual
The radar sensor vision is impaired . Do not cover
the area in front of the sensors with bike wheels,
stickers, dirt or other objects. Clean the area in
front of the sensors, if necessary
c:> page 76,
fig . 84 .
@j Audi side assist: currently unavailable.
See owner's manual
Side assist cannot be switched on at th is time be­
cause there is a malfunction (for example, the battery charge level may be too low) .
@j Audi side assist: malfunction! Please
contact Service
The system cannot guarantee that it will detect
veh icles correctly and it has switched off . The
sensors have been moved or are faulty. Have the
system checked by an author ized Audi deale r or
authorized Audi Service Facility soon.
Audi drive select (drive
settings)
Introduction
A pp lies to: ve hicles w ith Aud i d rive select
Drive select makes it possible to expe rience d if­
fe rent types of vehicle settings in one vehicle.
The driver can select from three modes, Comfort,
Auto and Dynamic , using the
i:l:ta button in the
center console or by using the Infotainment sys­
tem . T his allows you to switch between a sporty
and a comfortab le driving mode, for examp le. In
the Indi vidual mode, the settings can be adjust­
ed to your personal preferences. This makes it
possible to combine sett ings such as a sporty en­
g ine setting w ith light steering.
78
A WARNING
Using Aud i drive select incorrectly can lead to
coll is ions, other accidents and serious inju­
ries.
Description
App lies to: vehicles with A udi drive se lect
The veh icle setup in each mode depends on the
vehicle's features.
Engine and automatic transmission
Depending on the mode, the engine and auto­
matic transmission respond more quickly or in a
more balanced manner to accelerator pedal
movements.
Suspension control (Audi magnetic ride)*
The suspension control uses sensors to record in­
format ion regarding steering movements, brak­
i ng and acceleration operations by the driver, as
well as information about the road surface, driv­
i ng speed, and load. W ith dr ive se lect, you can
adjust the suspension control to sporty (dynam­
ic ), comfortable (comfort) or balanced (auto).
Steering
The power steering adapts . Indirect steering that
moves eas ily as in comfort mode is espec ially
su ited to long drives on a highway . The dynamic
mode provides sporty, direct steering.
Engine sound*
The engine sound adapts to the current mode
and can be subtle to sporty .
(D Tips
In some models, the maximum vehicle speed
can only be reached in the auto and dynamic
modes .

Cl co .... N ,....
N .... 0 ,....
Vl co
Emissions control
systems
Catal ytic conve rt er
The vehicle may on ly be driven with unleaded
gasoline, otherwise the catalyt ic converter will be
destroyed.
Never drive until the tank is completely empty.
The irregular supply of f uel that results from that
can cause engine m isfires. Uncombusted fuel will
enter the exhaust system, wh ich can cause over­
heat ing and damage to the catalyt ic converter .
A WARNING
The temperature of the exhaust system is
high, both when d riving and after stopping
the engine.
-
- Never touch the exhaust tail pipes once they
have become ho t. This could result in bu rns.
- Do not park your vehicle ove r flammable
materials such as g rass or leaves because
the high temperat ure of the em iss ions con­
trol system co uld s tart a fire.
- Do not apply underbody p rotectant in the
exha ust system area, because this inc reases
the risk of fi re.
On Board Diagnostic
System (OBD)
The On -Board Diagnostic System monitors the
engine and transmission components that influ­
ence emissions.
F ig . 177 Footwell on left side of the vehicle : connect ion
port for the On-Board Diagnostic System (OBD)
Chec king and Filling
On -Board Diagnostic System
Engine da ta can be read out at the On-Board Di­
agnost ic System connection port using a spec ia l
testing
dev ice~ fig. 177 .
Indicator light
If thP ¢'4 ind icator light blinks or turns on, there
is a ma lf u nction that is caus ing poo r emissions
quality and that cou ld damage the catalytic con­
verter .
Drive slowly to an a uthorized Aud i dea ler or au­
t h orized Audi Serv ice Facili ty to have t he mal­
f unct ion corrected.
A WARNING ..
Incorrect use of the connection port for the
On-Board D iagnostic System can cause ma l­
f u nctions, which can then result in accidents
and serious injuries.
- Only allow an authorized Audi dea ler or au­
thor ized Audi Service Fac ility to read out the
engine data.
Engine compartment
Working in the engine compartment
Special care is required if you are working in the
engine compartment
-
F o r work in the engine compa rtment such as
checking and fill ing fl uids , there i s a risk of in­
jury , scalding, accident s, and b urn s. For thi s
re ason , follow all the warnings and general
safety pre cautions prov ided in the following
in ­
formati on. The engine compartm ent i s a dan­
gerou s area .
~ .&..
A WARNING
-----Turn the engine off.
- Sw itch the igni tio n off.
- Set the parking brake.
- P lace the se lector lever in the P position.
-Let the eng ine cool down.
-Never open the hood when there is steam or
coolant escaping from the engine compart­
ment, because there is a risk that you could
233

Cl co .... N ,....
N .... 0 ,....
Vl co
bring your vehicle to an authorized Aud i dea l­
er or authorized Audi Service Facility to be
checked.
Opening/closing the hood
The hood is released from inside the vehicle.
F ig. 178 Sect ion from the drive r's side footwell: release
lever
F ig. 179 Unloc ked hood: lever
"' 8
~ (I)
Make sure the w iper arms are not raised up from
the windshield. Otherwise the pa int could be
damaged .
Checking and Filling
Opening the hood
... With t he driver's door open, pull the lever be­
low the inst rument pane l in the direction of the
arrow ¢ fig. 178 .
... Raise the hood slightly ¢.&, .
... Press the lever¢ fig. 179 in the direction of the
arrow. Th is releases the hooks .
... Open the hood .
Closing the hood
... Push the hood down unti l yo u override the
force of the struts .
... Let the hood fall lightly into the latch. Do not
press it in.
¢ .&, .
A WARNING
--Never open the hood when there is steam or
coolant escaping from the engine compart­
ment, because there is a risk that you could
be burned. Wait unt il no steam or coolan t is
escapi ng.
- F or safety reasons, the hood m ust always be
closed securely while driving. Because of
this, always che ck the hoo d after closing it
to make sure it is latched correct ly. The
hood is latched if the front corners cannot
be lifted.
-If you notice that the hood is not latched
while you are driving, stop immediately and
close it, because driving when the hood is not latched increases the r isk of an accident.
235

Cl 00 .-< N r-­N .-< 0 r-­Vl 00
lubricating properties of oil diminish gradually
during normal vehicle use.
Unde r some c ircu mstances the eng ine o il should
be changed more frequently . Change oil mo re of­
ten if you drive most ly short distances, ope rate
the vehicle in dusty areas or under predominant ly
stop-and -go traffic condit ions, or have your vehi­
cle where temperatures remain below free zing
for extended periods.
Detergent additives in the oil will make fresh oil
l ook dark after the engine has been running for a
short time. Th is is normal and is not a reason to
change the oil more often than recommended.
Because of the problem of proper disposa l, along
with the special tools and necessary expertise re­
qu ired, we strongly recommend that you have
your oil changed by an authorized
A ud i de ale r or
a qualified service station .
If you c hoo se to change your o il y our self , please
note the following important information:
A WARNING
To reduce the risk of personal injury if you
must change the engine oil in your veh icle
yourself:
- Wear eye protection .
- To reduce the risk of burns from hot engine oil, let the eng ine cool down to the touch.
-
- When removing the o il drain plug with your
fingers, stay as far away as poss ible. A lways
keep your forearm paralle l to the ground to
help prevent hot o il from runn ing down your
arm .
- Drai n the oil into a container designed for
this pu rpose, one large enough to hold at
least the total amount of oil in your e ng ine .
- Engine oil is poisonous . Keep it well out of
the reach of ch ild ren .
- Cont inuous contact w ith used eng ine oi l is
harmful to your sk in. A lways protect your
sk in by washing oil off thoroug hly w ith soap
and water.
@ Note
Never mix oil addit ives with your engine o il.
These additives ca n damage your eng ine and
Ch eck ing and F illing
adverse ly affect yo ur Audi Limited New Vehi­
cle Warranty.
@ For the sake of the environment
- Before chang ing yo ur oil, first make sure
you know where you can proper ly d ispose o f
the used oi l.
- Always dispose of used engine o il properly.
Do not dump it on garden soil, wooded
areas, into open streams or down sewage
drains.
- Recycle used engine oi l by taking it to a used
engine oi l collection faci lity in you r area, or
contact a service station .
Cooling system
Coolant
The eng ine cooling system is fi lled w it h a m ixtu re
of purified water and coo lant additive at the fac ­
tory . This coolant must not be not c hanged.
T he coo lant level is mo nitored th ro ugh
the . in­
dicator light
<:!) page 12. However, we do recom­
mend occasionally checking the coolant leve l
manua lly.
If you must add coolant, use a mixture of wate r
and coolant additive . Mix ing t he coo lant add it ive
with dis tilled water is recommended.
Coolant additive
T he coolant add itive is made of anti-free zing and
cor rosion protect ion agents. On ly use the follow­
i ng coolant additives . These add itives may be
mixed wi th ea ch o the r.
Coolant additive Specification
G 13 TL 774 J
G12++ TL 774 G
The amount of coolant additive that needs to be
mixed with water depends on the cl imate where
the vehicle w ill be oper ated. If the coo lant add i­
t ive percentage is too low, the coolant can freeze
and damage the eng ine .
.,.
239

Checking and Filling
Coolant Freeze protec-
tion
additi ve
Warm min. 40% min. -13 °F
regions (- 25 °C)
max . 45%
Cold min. 50% max. -40 °F
regions (-40 °C)
max. 55%
@ Note
- Before the start of winter, have an author­ ized Audi dealer or authorized Audi Service
Facility check if the coolant additive in your
vehicle matches the percentage appropriate
for the climate. Th is is especially important
when driving in co lder climates.
- If the appropriate coolant additive is not
available in an emergency, do not add any
other additive . You cou ld damage the en­
gine.
If t his happens, only use wate r and re­
store the correct mixture ratio with the
specified coolant additive as soon as possi­
ble .
- Only refill with new coo lant.
- Radiato r sealant must not be mixed w ith
the coo lant .
Adding coolant
Fig . 183 Eng ine co mpartment : coo lant expans ion ta nk
cove r (exa mple)
Observe the safety precautions c:::> page 233 ,
Working in the engine compar tment.
Che cking the engin e coolant l evel
.. Park the vehicle on a level surface .
.. Switch the ignition off .
240
~ 0 > 00 ID
.. Read the coolant level on the coolant expansion
tank
c:::> page 236, fig. 180 . The coolant level
must be between the markings when the en­
gine in cold. When the engine is warm it can be
slightly above the upper mark ing .
Adding coo lant
Requirement : there must be a residual amount of
coolant in the expansion tank
c:::> @ .
.. Let the engine cool down.
.. Place a clot h over the coolant expansion tank
cap and unscrew the cap counterclockwise
c:::> ,A .
.. Add coo lant mixed in the correct rat io
c:::> page 239 up to the upper marking .
.. Make sure that the fluid level remains stable.
Add more coolant if necessary .
.. Close the cap securely .
Coolant loss usually ind icates there is a leak. Im­
mediate ly dr ive your vehicle to a n author ized
Audi dealer or author ized Audi Service Fac il ity
and have the cooling system inspected. If the
cooling system is not lea king , a loss can come
from the coolant boiling through overheat ing
and being pushed ou t of the cooling system .
Lil WARNING
- The cooling system is under pressure. Do
not open the coo lant expansion tank cap
when the engine is hot. This increases the risk of burns.
-The coolant additive and the coolant can be dangerous to your health. For this reason ,
keep the coolant in the original container
and away from children. There is a risk of
poisoning.
-When working in the engine compartment,
remember that the radiator fan can switch
on even if the ignition is switched
off, wh ich
increases the r is k of injury.
@ Note
Do not add coolant if the expans ion tank is
empty . A ir could enter the cooling system and
-
damage the eng ine . If this is the case, do not ..,.

Checking and Filling
A WARNING
California Proposit ion 65 Warning:
- Battery posts, terminals and related acces­ sories contain lead and lead compounds, chemicals known to the State of California
to cause cancer and reproductive problems .
Wash hands after handling .
Q) Note
If the vehicle will be parked for long periods
of t ime, protect it against the cold so that it
w ill not be destroyed by "freezing"
~page 242 .
Vehicle battery
The term "vehicle battery " refers to the 12 Volt
battery in your vehicle .
Not running the vehicle for long p eriods of
t ime
If you do not drive your vehicle for several days or
weeks, electrical equipment is gradually scaled
back or switched off . This reduces energy use and
ensures the veh icle w il l be able to sta rt after long
pe riods of time
i:::> page 91. Some convenience
functions, such as interior light ing or power sea t
adjustment, may not be available under certain
circumstances . These convenience functions will
be avai lab le again once you switch the ignition on
and start the engine.
Even when electrical equipment is switched off ,
the equipment can still drain the vehicle battery if the vehicle is not driven for long periods of
time. Deep draining results in a chemical reaction
that destroys the inside of the vehicle battery.
The vehicle battery must be charged every month to reduce the risk of this happen ing
i:::> page 242.
Contact an author ized Audi dealer or authorized
Aud i Serv ice Facility for more information.
Winter operati on
Cold weather places higher demands on the vehi­
cle battery . This results in reduced start ing abili ­
ty . Have the vehicle battery checked by an au­
thori zed Audi dealer or authorized Audi Service
Facility before the co ld time of year.
242
Charging the vehicle battery
Fig. 18 5 En g in e compartmen t: co nn ectors fo r a cha rger
a n d jum p start cab les
Requireme nt: only use chargers with a maximum
charging volt age of 30 amp s/14.8 Volts.
The
vehicle battery cables remain connected.
... Read the wa rnings i:::> ,& in General warnings
about batteries on page 241
and i:::> ,& .
... Switch off the ignition and all electrica l equip ­
ment .
... Open the hood i:::> page 235 .
... Open the red cover on the positive terminal
¢fig. 185.
... Clamp the charger terminal clamps to the jump
s ta rt pins
according to the instructions
c::> fig . 185 .
... Now insert the power cable for the cha rging de­
vice into the socket and switch the device on .
... At the end of the charging process, switch the
charger off and pull the power cable out of the
socket .
... Remove the charger terminal clamps.
... Close the red cover on the pos itive terminal.
... Close the hood i:::> page 235.
A WARNING
-A highly explosive m ixture of gases can form
when charg ing batteries . Only charge the
veh icle battery in well-ventilated areas.
-A drained vehicle battery can freeze at tem­
peratures around 32
QF (0 QC) . A frozen or
thawed vehicle battery must not be charged
and must not be used anymore. If ice forms,
the battery housing can crack and battery
electrolyte can leak out, which increases the
risk of an explosion and c hemical burns .
Contact an authorized Audi dealer or
..,_

Cl 00 .-< N r-­N .-< 0 r-­Vl 00
authorized Audi Service Facility for more in­
formation.
- Do not connect or disconnect the charging
cable while charging because this increases
the risk of an exp losion.
(D Tips
- Only charge the vehicle battery through the
connections in the engine compartment.
- Read all of the manufacturer's instructions
for the charger before charging the vehicle
battery.
Windshield washer system
Fig. 186 Engine compa rtment: washer flu id reservo ir cap
The windshield washer reservoir W contains the
cleaning solution for the windshie ld and the
headlight washer
system* ¢ page 236, fig . 180.
The reservoir capacity can be found in
¢page 288.
To reduce the risk of lime sca le deposits on the
spray nozzles, use clean water with low amounts
of calc ium. A lways add window cleaner to the wa­
ter. When the outs ide temperatures are cold, an
anti -freezing agent should be added to the water
so that it does not freeze.
@ Note
-The concentration of anti-freezing agent
must be adjusted to the vehicle operating
cond itions in the respective climate. A con­
ce ntrat ion that is too high can lead to vehi­
cl e damage.
- Never add radiator anti-freeze or other addi­
tives to the washer fluid.
Checking and Filling
- Do not use a glass cleaner that contains
paint so lvents, because t his could damage
the paint.
Service interval display
The service interval display detects when your ve ­
hicle is due for service .
The service interval display works in two stages:
-Inspection or oil change reminder : after a cer-
tain distance driven, a message appears in the
In fotainment system display each time the ig ­
nition is switched on or off. The remaining dis­
tance or time is disp layed briefly.
- Inspection or oil change due: if your vehicle
has reached an inspection or oil change interval
or both intervals at the same t ime, the mes­
sage
Inspection due! or Oil change due! or Oil
change and inspection due!
appears briefly af ­
ter switching the ignition on/off .
Checking service intervals
You can check the remaining distance or time un ­
t il the next oil change or next inspection. Se lect
in the Infotainment system: the
I MENU I button>
Vehicle > left control button > Service & checks >
Service intervals .
Resetting the indicator
An authorized Audi dea ler or authorized Audi
Service Facility w ill reset the service interval dis­
play after performing service.
If you have ch anged the oi l yourse lf, you must re ­
set the oil change interval.
T o reset the disp lay, select in the Infotainment
system: the
I MENUI button> Vehicle> left con­
trol button >
Service & checks > Service intervals
> Reset oil change interval.
@ Note
-Only reset the oil change indicator if the oi l
was changed.
- Following the service intervals is crit ica l to
maintaining the service life and value of
your vehicle, especially the engi ne. Even if
the mileage on the vehicle is low, do not ex­
ceed the time for the next service.
243

Wheels
Displaying tire pressures/temperatures
Applies to: vehicles with tire pressure monitoring system
Requirement: you must be d rivi ng the veh icle .
"'Se lect in the Infotainment system: IMENU I but­
ton
> Service & checks > Tire pre ssur e monitor­
ing > Di splay tire pressure.
- Green:
the current tire pressure and the speci­
fied t ire pressure are approximately the same .
-Yellow: the current tire pressure is too low
compared to the specified tire pressure .
The specified tire press ure is the last tire pres ­
sure that was stored
c> page 264.
Note that t he tire p ressure also de pends on the
temperature of the tire . The tire press ure in­
creases as the engine becomes wa rmer whi le
driving.
A WARNING
Read and follow the important information
and notes
c> page 263.
(D Tips
The tire pressure or temperature is not d is ­
played while the veh icle is stationary and in
adaptation mode. Dashes --.--are shown in
place of the pressu re and temperature.
(D Tire pressure loss
Applies to: vehicles with tire pressure monitoring system
-
If the Rt] indicato r light turns on, the p ressure in
at least one t ire is too low o r new sensors we re
not adapted :
[I] indicator lights turns on after turning the
ignition on
The tire pressure is too low compared to the
specified p ressure.
"' Check and store the t ire pressure(s) the next
time it is poss ible
c> page 264 .
[I] indicator light turns on while dri ving
Wheels with new sensors were not adapted or
the t ire pressure has reached a critical leve l com­
pared to the specified pressure .
264
"'Avoid unnecessary steering and brak ing maneu -
vers .
"'Adapt your dr iving sty le to the s ituation.
"' Stop as soon as possible and check the tire(s).
"'If it is possib le to continue driv ing, see an au-
thorized Audi dealer or authorized Aud i Service
Facility immediately and have your tire(s) re­
pa ired o r rep laced .
A WARNING
Read and fo llow the impo rtant info rmation
and n otes
c>page 263.
Storing new tire pressures
Applies to: vehicles with tire pressure monitoring system
Correctly stored tire pressure specifications are
necessary for reliable tire pressure monitoring.
-
It is always necessary to store the t ire pressures
whe n the t ire pressu res a re modified, fo r exam­
ple d ue to a change in load . o r when new senso rs
a re installed.
"' Before storing the t ire pressures, make su re the
tire pressures of all four t ires meet the spec i­
fied va lues and are adapted to t he load
c::> page 254, fig. 190 . Only correct and store
the pressure in tires whose temperature is ap ­
proximate ly the same as the ambient tempera ­
t u re . If the temperature of the tire is higher
than the ambient air temperature, the tire pressure must be increased approximately
3.0 PSI (0.2 bar) above the value on the st icker.
"' Switch the ignit ion on .
"'Select in the Infotainment system : IMENU! but­
ton
> Service & checks > Tire pressure monitor­
ing > Store tire pre ssure > Ye s, store now .
Af­
ter storing the t ire pressures, the t ire press ure
mon itor ing system measures the c urrent pres ­
sures while driving and stores them as the new
specified pressures .
"'If the changed tire pressures are not displayed
in the Infotainment system, drive the vehicle
for approximately 10 minutes so that the sen­ sor signa l from the wheels is received again .
During this adaptation phase, -- .- - is d isplayed
for the pressure and temperature and the tire pressure monitoring system is on ly partially