2021 AUDI TT check engine light

8S1012721BE
Quick access

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Side assist display ..............
Door handle
Central locking switch ...........
Air vent with seat heating controls
Lever for:
—Turn signals and high beams ....
Multifunction steering wheel with:
— Horn be
— Driver's@irbag . ccis ss ewan sens
— Buttons for the virtual instrument
cluster, including the driver infor-
mation system, audio/video, tele-
phone, navigation and voice rec-
ognition system
—[START ENGINE STOP] button ...


— Audi drive select ..............
— Shift paddles ................
Audi virtual cockpit (instrument
cluster) ........ 2... ee eee eee ee
Windshield washer system lever ..
Starting the engine if there is a
malfunction ..............-0005
Adjustable steering column ......
Cruise controllever .............
Instrument illumination .........
Hood release ............--.00-
Headlight control switch ........
Power exterior mirror adjustment .
Power windows ................
Air vent including climate control
system controls ..............-.
Lockable glove compartment
Drives for CD, DVD, SIM/SD cards .
Front passenger's airbag ........
Rear window defogger button
Depending on equipment, buttons
for:
—drive select ..................
— Electronic Stabilization Control
(ESO) « ss mews ¢ x news 8 x eis eo es
—Emergency flashers ...........
— Retractable rear spoiler ........
Depending on equipment, center
console with:
— Audi music interface ..........
93
23
37
52 7S
96
85
10
41
77
48
89
39
200
36 39 27 69
170
52
96
104
38
108 176
— Audi phone box ............... 130
@ Infotainment system on/off button . 110
@5) Infotainment system unit ........ 110
@8 Wind deflector button .......... 33
@ Depending on equipment:
— Storage compartment

—Cup holder ...............0.. 63
@8 Power top button .............. 31
@9 Parking brake ................. 79
G0) Depending on equipment:
—[START ENGINE STOP] button ... 75
— Engine sound button
@) Selector lever (S tronic).......... 81
@) Tips
Some the equipment listed here is only instal-
led in certain models or is available as an op-
tion.
Indicator lights overview
The indicator lights in the instrument cluster
blink or turn on. They indicate functions or mal-
functions. Some warning and indicator lights
turn on when you switch the ignition on and must
turn off when the drive system is switched on or
while driving.
With some indicator lights, messages may ap-
pear and warning signals may sound. The indica-
tor lights and messages may be covered by other
displays. To show them again, select the second
tab for messages with the multifunction steering
wheel > page 72.
Some indicator lights in the display can display in
several colors.
OMe ile Lins
If the A or A indicator light turns on, check the
message in the instrument cluster.
COAT
The following indicator lights may be available,
depending on the vehicle equipment:

8S1012721BE
Instrument cluster

Do not switch the ignition off because you may
not be able to switch it on again.
Drive to an authorized Audi dealer or authorized
Audi Service Facility immediately to have the
malfunction corrected.
& Engine start system: malfunction! Please
contact Service
There is a malfunction in the engine start system.
Drive immediately to an authorized Audi dealer
or authorized Audi Service Facility to have the
malfunction repaired.
*\ Engine stop while driving
If the S indicator light turns on, there may bea
malfunction in the engine or fuel supply.
More force is needed to steer and brake the mov-
ing vehicle when the engine is stopped. If the ve-
hicle is rolling, try to bring it to a stop off to the
side from moving traffic. See an authorized Audi
dealer or authorized Audi Service Facility for as-
sistance.

ZA\ WARNING
If the engine stops while driving, you will need
to use more force to brake the vehicle. This in-
creases the risk of an accident. There will still
be power steering if the ignition is switched
on while the vehicle is rolling and there is suf-
ficient battery charge. Otherwise, you must

use greater force when steering.

53/8 Electronic Stabilization Control (ESC)

If the B indicator light blinks while driving, the
ESC or ASR (Anti-Slip Regulation) is actively regu-
lating.
If the BB indicator light turns on, the system has
switched the ESC off. In this case, you can switch
the ignition off and then on to switch the ESC on
again. The indicator light turns off when the sys-
tem is fully functional.
If the [J indicator light turns on, ESC was
switched off using the |2%] button > page 705.


Stabilization control (ESC/ABS): malfunction!
See owner's manual
If the B indicator lamp and the ES / Gass in-
dicator lamp turn on and the driver message ap-
pears, the ABS or electronic differential lock is
malfunctioning. This also causes the ESC to mal-
function. The brakes still function with their nor-
mal power, but ABS is not active.
Drive to an authorized Audi dealer or authorized
Audi Service Facility immediately to have the
malfunction corrected.
@ Tips
For additional information on ESC and ABS,
see > page 104.
If the B indicator light turns on if there is a mal-
function in the engine control. Drive slowly to an
authorized Audi dealer or authorized Audi Service
Facility to have the engine checked.
§ Suspension control
Applies to: vehicles with Audi drive select
If the | 8 | indicator light turns on, then there is a
malfunction in the suspension control. Drive im-
mediately to an authorized Audi dealer or author-
ized Audi Service Facility to have the malfunction
repaired.
17

Driving

appears in the instrument cluster once the en-
gine stops automatically.
> The engine starts again when you remove your
foot from the brake pedal. The indicator light
turns off.
Additional information for automatic
transmissions
The engine stops in the "P", "N" and "D" selector
lever positions.
If you select the “R” gear during a Stop phase
while pressing the brake pedal, the engine will
start again.
Shift to "P" quickly to prevent the engine from
starting unintentionally when shifting through
"RM.
You can control if the engine will stop or not by
reducing or increasing the amount of force you
use to press the brake pedal. For example, if you
only lightly press on the brake pedal in stop-and-
go traffic or when turning, the engine will not
switch off when the vehicle is stationary. If you
press the brake pedal harder, the engine will
switch off.
@) Tips
— Press the brake pedal during a Stop phase
to keep the vehicle from rolling.
— The ignition will turn off if you press the
START ENGINE STOP] button during a Stop


phase.
— When you stop and the Start/Stop system
turns the engine off, the ignition remains
on. Make sure the ignition is switched off
before you leave the vehicle or else the bat-
tery could drain.
General information
Applies to: vehicles with Start/Stop system
Starting and stopping the engine automat-
ically
The system checks if certain conditions are met
before and during the Stop phase, and deter-
mines if the engine stops and how long it re-
mains stopped. For example, if power usage is
high, the engine will not be stopped. Along with
78
other conditions, the following factors influence
the automatic engine start or stop:
— Environmental conditions (slopes, inclines, ele-
vation, temperature)
— Battery (charge status, temperature, power us-
age)
— Engine temperature
— Assist systems
— Driving behavior
Depending on the engine, the indicator light
may appear if the engine is not stopped.
Ignition is switched off automatically
To prevent the vehicle battery from draining, the
ignition will switch off automatically under the
following conditions:
— If the vehicle has already been driven
— If the Start/Stop system has stopped the en-
gine
— If the driver's door is opened
— If the driver's safety belt is unbuckled
— If the brake pedal is not pressed
— If the vehicle is stationary
In this case, the parking lights switch on in place
of the low beams and the message Side marker
lights will switch off automatically in 30 mi-
nutes. See owner's manual appears in the Info-
tainment system display. The side marker lights
will switch off after approximately 30 minutes or
when you lock the vehicle.
If the Start/Stop system has not turned off the
engine or if you have switched the Start/Stop sys-
tem off manually, the ignition will not be auto-
matically switched off and the engine will contin-
uetorun>A.

ZA WARNING
To reduce the risk of poisoning, never allow
the engine to run in confined spaces.
G) Tips
If you select the “D” or “N” selector lever posi-
tion after shifting into reverse, the vehicle
must be driven faster than 6 mph (10 km/h)
in order for the engine to switch off again.

Driving

P - Park
You can only shift into Park when the vehicle is
stationary > A.
To shift in and out of the P selector lever position,
press the interlock button in the selector lever
while pressing the brake pedal.
R - Reverse
Only shift into reverse gear when the vehicle is
stationary and the engine is running at idle
speed >A.
To select the R selector lever position, press the
interlock button while pressing the brake pedal.
The back-up lights switch on in the R position if
the ignition is switched on.
N - Neutral (idle)
The transmission is in idle in this position.
D/S - Normal position for driving forward
In the D/S selector lever position, the transmis-
sion can be operated either in the normal D mode
or in the S sport mode. To select the S sport
mode, pull the selector lever back briefly. Pulling
the lever back again will select the normal D
mode. The selected driving mode is shown in the
Infotainment display.
In the normal mode "D", the transmission auto-
matically selects the correct gear. It depends on
engine load, vehicle speed and driving style.
Select the sport mode "S" for sporty driving. The
vehicle makes full use of the engine's power.
Shifting may become noticeable when accelerat-
ing.
To move from selector lever position "N" to "D",
you must press the brake pedal and the vehicle
must be traveling less than 1 mph (2 km/h) or be
stationary > A.


— Never select "R" or "P" while driving, be-
cause this increases the risk of an accident.
— Power is still transmitted to the wheels
when the engine is running at idle. To pre-
vent the vehicle from “creeping”, you must
keep your foot on the brake in all selector
lever positions (except “P”) when the engine
is running. Otherwise, this increases the risk
of an accident.
— Do not inadvertently press the accelerator
pedal when the vehicle is stopped if a gear is
engaged. Otherwise the vehicle will start to
move immediately, even if the parking brake
is set. This could result in a crash.
— Do not press the accelerator pedal when
changing the selector lever position while
the vehicle is stationary and the engine is
running.
— Never leave your vehicle with the engine
running while in gear. If you must leave your
vehicle when the engine is running, set the
parking brake and move the selector lever to
the "P" position.
— To decrease the risk of an accident, the se-
lector lever must be in the P position and
the parking brake must be set before open-
ing the hood and working ona running en-
gine. Always read and follow the applicable
warnings > page 200, General information.


Z\ WARNING
Read and follow all WARNINGS.
— Before starting to drive, check if the desired
selector lever position is displayed next to
the selector lever.
— The vehicle can roll even if the ignition is

switched off.

82
@) Note
Never let the vehicle roll downhill with engine
off and the selector lever in the "N" position,
because this could damage the automatic
transmission and catalytic converter.
(i) Tips
— Drive select: sporty shifting characteristics
can be selected using the Dynamic driving
mode. The Infotainment display shows “S”
as the selector lever position instead of “D”.
— If you accidentally select "N" while driving,
take your foot off the accelerator pedal im-
mediately and wait for the engine to slow
down to idle before selecting "D" or "S".
— If there is a power failure, the selector lever
will not move out of the "P" position. The >

8S1012721BE
Intelligent Technology

— Utilize the engine braking effect when driv-
ing downhill by selecting the “S” driving
program > page 82. This reduces the load
on the brakes. If you need to brake addition-
ally, brake in intervals and not continuously.
G) Tips
— If you retrofit your vehicle with a front spoil-
er, wheel covers or similar items, make sure
that the air flow to the brakes is not ob-
structed. Otherwise the brake system can
overheat.
— Also refer to the information about brake
fluid > page 209.
Messages
EG / ©) Brakes: malfunction! Safely stop ve-
hicle
There is a malfunction in the brake system. If
[ES / Gana Blalso turn on, there is a malfunc-
tion in the ABS, ESC, and braking distribution. If
the brake booster is not working, you have to use
much more force when braking the vehicle.
Do not continue driving. See an authorized Audi
dealer or authorized Audi Service Facility for as-
sistance. Read and follow the other safety pre-
cautions > A\.
GG / @ Warning! No brake booster function
If the brake booster is not working, you have to
use much more force when braking the vehicle.
See an authorized Audi dealer or authorized Audi
Service Facility for assistance.
GG if @ Brake pads: wear limit reached. You
can continue driving. Please contact Service
The brake pads are worn. Drive to an authorized
Audi dealer or authorized Audi Service Facility as
soon as possible to have the malfunction correct-
ed.
Ga / @ Parking brake: malfunction! Safely
stop vehicle. See owner's manual
— If the indicator light and the message appear
when the vehicle is stationary or after switch-
ing the ignition on, check if you can release the
parking brake. If you cannot release the parking
brake, see an authorized Audi dealer or author-
ized Audi Service Facility. If you can release the
parking brake and the message still appears,
see an authorized Audi dealer or authorized
Audi Service Facility immediately to have the
malfunction corrected.
— If the indicator light and message appear while
driving, the hill start assist or emergency brak-
ing function may be malfunctioning. It may not
be possible to set the parking brake or release
it once it has been set. Do not park your vehicle
on hills. See an authorized Audi dealer or au-
thorized Audi Service Facility for assistance.
Other indicator lights
When you switch the ignition on, the IBRAKE| /@
indicator light turns on briefly to check the func-
tion. If the indicator light does not turn on, there
is a system malfunction.
fe / @ stays on, there is a malfunction in
the brake system.

ZA\ WARNING
If a malfunction occurs in the ABS, ESC, and
braking distribution, interventions that stabi-
lize the vehicle will no longer be available.
This could cause the vehicle to swerve, which
increases the risk that the vehicle will slide.
Do not continue driving. See an authorized
Audi dealer or authorized Audi Service Facility
for assistance.

Steering
Electromechanical steering supports the driver's
steering movements by electronically adapting
the power steering depending on the vehicle
speed. The settings depend on the selected Audi
drive select* mode.
Messages
a Steering: malfunction! Please stop vehicle
The power steering may have failed. Adapt your
driving style immediately to compensate for the
fact that it may be more difficult to turn the >
107

Intelligent Technology

steering wheel, and stop your vehicle in a safe lo-
cation as soon as possible. Do not continue driv-
ing. See an authorized Audi dealer or authorized
Audi Service Facility for assistance.
& Steering: malfunction! You can continue
driving
There is a malfunction in the steering system.
Steering may be more difficult or more sensitive.
Adapt your driving style. Have the steering sys-
tem checked immediately by an authorized Audi
dealer or authorized Audi Service Facility. Please
note that the red indicator light may turn on af-
ter restarting the engine. Do not continue driving
if it does.
@ Tips
If the a or El indicator light only stays on
for a short time, you may continue driving.
All wheel drive (quattro)
Applies to: vehicles with all wheel drive

The all-wheel drive system distributes the driving
power variably to the front and rear axle to im-
prove the driving characteristics. It works togeth-
er with selective wheel torque control, which can
activate when driving through curves
=> page 104.
The all-wheel drive system is designed for high
motor power. Your vehicle is exceptionally power-
ful and has excellent driving characteristics both
under normal driving conditions and on snow and
ice. Always read and follow safety precautions
>A.

Z\ WARNING
— Even in vehicles with all wheel drive, you
should adapt your driving style to the cur-
rent road and traffic conditions to reduce
the risk of an accident.
— The braking ability of your vehicle is limited
to the traction of the wheels. In this way, it
is not different from a two wheel drive vehi-
cle. Do not drive too fast because this in-
creases the risk of an accident.

108

— Note that on wet streets, the front wheels
can “hydroplane’” if driving at speeds that
are too high. Unlike front wheel drive
vehicles, the motor RPM does not increase
suddenly when the vehicle begins hydro-
planing. Adapt your speed to the road condi-

tions to reduce the risk of an accident.

Rear spoiler
Applies to: vehicles with retractable rear spoiler

a
id > z
oO


Fig. 113 Center console: button for the rear spoiler
The rear spoiler increases driving stability. The
rear spoiler extends automatically at speeds
above approximately 75 mph (120 km/h). It will
retract automatically when the speed drops be-
low approximately 50 mph (80 km/h).
You can also extend and retract the rear spoiler
manually.
> Extending: press > briefly.
> Retracting: press and hold 3% when driving at
speeds up to approximately 10 mph (20 km/h).
At speeds from approximately 10 mph (20
km/h) to 75 mph (120 km/h), press 3% briefly.
Messages
If the HB or Mturns on and a corresponding
message appears, the rear spoiler may not be
able to extend due to a malfunction. This could
change the vehicle's driving characteristics at
high speeds. Do not drive faster than 85 mph
(140 km/h).
The rear spoiler may be blocked. Clean the rear
spoiler compartment > page 237, close all vehi-
cle doors and lids, and wait several minutes until
the vehicle has completely turned off. If the indi-
cator light turns on again the next time the >

Checking and Filling

Checking and Filling
Fuel
Types of gasoline
The correct gasoline grade is stated on the inside
of the fuel filler door.
The vehicle is equipped with a catalytic converter
and must only be driven with unleaded gasoline.
Audi recommends using TOP TIER Detergent Gas-
oline. For additional information on TOP TIER De-
tergent Gasoline, visit www.toptiergas.com.
The individual gasoline grades are differentiated
by octane ratings. This value is given with (R
+M)/2 equating to AKI or in RON.
The headings below match the sticker in the fuel
filler door (examples):
UNLEADED FUEL ONLY MIN. (R+M)/2 87
Regular / MIN. RON 91 Regular
Use regular gasoline with minimum 87 AKI /
91 RON >©.
UNLEADED FUEL ONLY PREMIUM MIN. (R
+M)/2 91 / SUPER MIN. RON 95
Using premium gasoline with minimum 91 AKI /
95 RON is recommended.
Applies to: TT and TTS models: If premium gaso-
line is not available, you can also use regular gas-
oline 87 AKI / 91 RON. However this does reduce
the engine power slightly.
Applies to: RS models: To achieve the specified
power and torque, Audi recommends using pre-
mium plus gasoline with at least 93 AKI / 98
RON.
Applies to: RS models: If premium gasoline is not
available, you can also use regular 87 AKI /
91 RON gasoline if absolutely necessary. Howev-
er, you must only drive in the middle of the RPM
range and with low engine load. Refuel your vehi-
cle with premium gasoline as soon as possible.
UNLEADED FUEL ONLY PREMIUM MIN. (R
+M)/2 93 / SUPER PLUS MIN. RON 98
Using premium plus gasoline with at least 93
AKI / 98 RON is recommended.
196
If no premium plus gasoline is available, you can
also use premium gasoline with 91 AKI / 95 RON.
However this does reduce the engine power
slightly.
C) Note
— Filling the tank just one time with leaded
fuel or other metallic additives will cause
permanent deterioration to the catalytic
converter function.
— When gasoline with an octane rating that is
too low is used, high speeds or heavy engine
load can lead to engine damage.
G) Tips
The vehicle may be filled with fuel that has a
higher octane rating than what is required by
the engine.
Gasoline mixture
Gasoline with alcohol or MTBE (Methyl-Tert-
Butyl-Ether)
You can use unleaded gasoline mixed with alco-
hol or MTBE (generally labeled as oxygenated
compounds) as long as the fuel meets the follow-
ing conditions:
Gasoline with methanol content (methyl alco-
hol or methanol)
— Anti-Knock Index is at least 87 AKI
—No more than 3% methanol
— More than 2% solvent
Gasoline with ethanol content (ethyl alcohol or
ethanol)
— Anti-Knock Index is at least 87 AKI
—No more than 15% ethanol
Gasoline with MTBE content
— Anti-Knock Index is at least 87 AKI
—No more than 15% MTBE
Gasoline adapted to the season
Many gasoline fuels are adapted to the seasons.
When the season changes, refueling at high-traf-
fic gas stations is recommended. It is more likely
that the gasoline will be suitable for the season
there.

Checking and Filling

continue fueling, or else the expansion space in
the tank will be filled with fuel.
> After the fuel pump has switched off, wait five
seconds before removing the nozzle to allow
the rest of the fuel to finish dripping into the
fuel tank.
> Close the fuel filler door and then press on the
left side until it latches.
The correct fuel type for your vehicle can be
found ona label located on the inside of the fuel
filler door. For additional information on fuel, see
=> page 196.
For the tank capacity in your vehicle, refer to the
Technical Data > page 264.
Messages
If the Ay indicator light appears with a corre-
sponding message, refuel the vehicle.
1D] Tank system: malfunction! Please contact
Service
There is a malfunction in the fuel tank system.
Drive to an authorized Audi dealer or authorized
Audi Service Facility immediately to have the
malfunction corrected.

flying sparks. Sparks can start a fire when
refueling.



Z\ WARNING
Improper fueling procedures and improper
handling of fuel can lead to explosions, fires,
severe burns, and other injuries.
— Do not smoke. Keep away from open flames.
— The ignition must be switched off when re-
fueling.
— Mobile devices, radio devices, and other ra-
dio equipment should always be switched
off when refueling. Electromagnetic rays
could cause sparks and start a fire.
— If you do not insert the fuel pump nozzle all
the way into the filler tube, then fuel can
leak out. Spilled fuel can ignite and start a
fire.
— Never get into the vehicle when refueling. If
there is an exceptional situation where you
must enter the vehicle, close the door and
touch a metal surface before touching the
fuel pump nozzle again. This will reduce the
risk of electrostatic discharge that can cause


ZA\ WARNING
Audi does not recommend transporting fuel
containers inside the vehicle. Fuel could leak
out of the container and ignite, especially dur-
ing an accident. This can cause explosions,
fires, and injuries.
— If you must transport fuel in a fuel contain-
er, note the following:
— Always place the fuel container on the
ground before filling. Never fill the fuel
container with fuel while it is inside or on
the vehicle. Electrostatic discharge can oc-
cur while refueling and the fuel vapors
could ignite.
— When using fuel containers made of met-
al, the fuel pump nozzle must always re-
main in contact with the container to re-
duce the risk of static charge.
— Insert the fuel pump nozzle as far as possi-
ble into the filler opening while refueling.
— Follow the applicable legal regulations in
the country where you are driving when
using, storing and transporting fuel con-
tainers.
— Make sure that the fuel container meets
the industry standards, for example ANSI
or ASTM F852-86.


198
@) Note
— Remove fuel that has overflowed onto any
vehicle components immediately to reduce
the risk of damage to the vehicle.
— Never drive until the fuel tank is completely
empty. The irregular supply of fuel that re-
sults from that can cause engine misfires.
Uncombusted fuel may enter the exhaust
system and increase the risk of damage to
the catalytic converter.
@) For the sake of the environment
— Do not overfill the fuel tank, or fuel could
leak out when the vehicle is warming up.
— Fuel should never enter the sewer system or
come into contact with the ground.