2021 AUDI A6 check engine

4K0012721BE
Checking and Filling

anti-freezing agent should be added to the water
so that it does not freeze.
Messages
EE Please add washer fluid
Fill the washer fluid for the windshield washer
system and the headlight washer system* when
the ignition is switched off.
@) Note
— The concentration of anti-freezing agent
must be adjusted to the vehicle operating
conditions and the climate. A concentration
that is too high can lead to vehicle damage.
— Never add radiator anti-freeze or other addi-
tives to the washer fluid.
— Do not use a glass cleaner that contains
paint solvents, because this 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 driv-
ing a certain distance, a message appears in the
instrument cluster display each time the igni-
tion is switched on or off. The remaining dis-
tance or time is displayed briefly.
— Inspection or oil change due: if your vehicle
has reached an inspection or oil change interval
or both intervals at the same time, the mes-
sage Inspection due! or Oil change due! or Oil
change and inspection due! appears briefly af-
ter switching the ignition on or off.
Checking service intervals
You can check the remaining distance or time un-
til the next oil change or next inspection in the
Infotainment system.
Applies to MMI: Select on the home screen: VE-
HICLE > Settings & Service > Service intervals.
Resetting the indicator
An authorized Audi dealer or authorized Audi
Service Facility will reset the service interval dis-
play after performing service.
If you have changed the oil yourself, you must re-
set the oil change interval.
Applies to: MMI: To reset the display, select on
the home screen: VEHICLE > Settings & Service
> Service intervals.
@) Note
— Only reset the oil change indicator if the oil
was changed.
— Following the service intervals is critical to
maintaining the service life and value of
your vehicle, especially the engine. Even if
the mileage on the vehicle is low, do not ex-
ceed the time for the next service.
255

Wheels

The specified tire pressure is the last tire pressure
that was stored > page 278.
Note that the tire pressure also depends on the
temperature of the tire. The tire pressure increas-
es as the engine becomes warmer while driving.

Z\ WARNING
Read and follow the important information
and notes > page 277.
@) Tips
The tire pressure or temperature is not dis-
played while the vehicle is stationary and in
adaptation mode. Dashes --.-- are shown in
place of the pressure and temperature.
OB iw sete ot
Applies to: vehicles with tire pressure monitoring system

If the @ indicator light turns on, the tire pres-
sure is too low compared to the specified pres-
sure. Check and store the tire pressure(s) the
next time it is possible > page 278.
® Flat tire! Safely stop vehicle. Please check all
tires and store pressures in MMI
If the indicator light turns on and the message
appears, the tire pressure has reached a critical
level compared to the specified pressure. Avoid
unnecessary steering and braking maneuvers.
Adapt your driving style to the situation. Stop as
soon as possible and check the tire(s). If it is pos-
sible to continue driving, see an authorized Audi
dealer or authorized Audi Service Facility immedi-
ately and have your tire(s) repaired or replaced.

Z\ WARNING
Read and follow the important information
and notes > page 277.

278
Storing new tire pressures
Applies to: vehicles with tire pressure monitoring system
The tire pressure specifications must be stored
correctly for the tire pressure monitoring system
to function reliably.
It is always necessary to store the tire pressures
when the tire pressures are modified, for exam-
ple due to a change in load or when new sensors
are installed.
> Before storing the tire pressures, make sure the
tire pressures of all four tires meet the speci-
fied values and are adapted to the load
=> page 266, fig. 169. Only correct and store
the pressure in tires whose temperature is ap-
proximately the same as the ambient tempera-
ture. If the temperature of the tire is higher
than the ambient air temperature, the tire
pressure must be increased approximately
3 PSI (0,2 bar) above the value on the sticker.
> Switch the ignition on.
> Applies to MMI: Select on the home screen: VE-
HICLE > Settings & Service > Tire pressure
monitoring > Store tire pressure > Yes, store
now.
> If the changed tire pressures are not displayed
on the MMI, drive the vehicle for approximately
10 minutes so that the sensor signal from the
wheels is received again.
During this adaptation phase, --.-- is displayed
for the pressure and temperature and the tire
pressure monitoring system is only partially
available. It only provides a warning if one or
more tire pressures is below the minimum per-
mitted specified pressure.
@ Tire pressure: wheel change detected. Please
check all tires and store pressures in MMI
If the indicator light turns on and the message
appears, the system has detected that the loca-
tion of the sensors has changed due to a wheel
replacement, or new sensors have been installed.
Store the new tire pressures.

ZA WARNING
Read and follow the important information
and notes > page 277.

4K0012721BE
Emergency assistance

> Connect the compressor hose to a vehicle sock-
et and switch it on.
> Let the compressor run until the specified value
on the tire pressure sticker is reached
> page 266, fig. 169>@.
> Screw the valve cap back onto the valve.
Returning to storage
> To release air, turn the valve insert. See an au-
thorized Audi dealer or authorized Audi Service
Facility.
> Turn the valve insert back once the air has been
released.
> Wait several hours before placing the collapsi-
ble spare tire in the spare wheel well. Only then
will it fold down completely so that you can
store it securely.
> Then screw the valve cap back onto the valve.
> Secure the collapsible spare tire with the hand-
wheel.
> Fold the cargo floor cover back into place.
Snow chains
Using snow chains on the collapsible spare tire is
not permitted for technical reasons.
If you have to drive with snow chains and a front
tire fails, mount the collapsible spare tire in place
of a rear tire. Install the snow chains on the rear
tire that you removed, and install that in place of
the front tire that failed.

Z\ WARNING
— Only use the collapsible spare tire in emer-
gencies and drive very carefully, especially if
it is more than six years old.
— The compressor and the hose can become
very hot during operation which increases
the risk of burn injuries.
— After installing a collapsible spare tire, the
tire pressure must be checked as quickly as
possible to reduce the risk of an accident.
— Do not drive faster than 50 mph (80 km/h)
with the collapsible spare tire. Driving faster
than that increases the risk of an accident.
— To reduce the risk of an accident, avoid hard
acceleration or braking and driving fast
around curves with the collapsible spare

tire.

— Never drive using more than one collapsible
spare tire, because this increases the risk of
an accident.
— Normal tires or winter tires must not be
mounted on the collapsible spare tire rim.
C) Note
The compressor must be switched off after six
minutes at the most to reduce the risk of
overheating. Let the compressor cool down
for several minutes before using it again.


Jump starting
You should only perform the steps that follow if
you have the necessary tools and technical ex-
pertise.
If the engine does not start because the vehicle
battery is drained, you can jump start your vehi-
cle using another vehicle. Jump start cables are
needed to do this.
Both vehicle batteries must have 12 V nominal
voltage. The voltage capacity (Ah) of the vehicle
battery that is giving power must not be less
than the capacity of the drained vehicle battery.
Jump start cable
Only use a jump start cable with a large enough
diameter. Note the manufacturer's specifica-
tions.
Only use a jump start cable with insulated termi-
nal clamps.
Positive cable - usually red.
Negative cable - usually black.

Z\ WARNING
— A drained battery can freeze at tempera-
tures around 32 °F (0 °C). If the vehicle bat-
tery is frozen, it must be thawed before con-
necting the jump start cables. If it is not,
the risk of an explosion and chemical burns
increases. After jump starting the vehicle, >

293

Emergency assistance


drive to an authorized Audi dealer or author-
ized Audi Service Facility immediately to
have the vehicle battery checked.
— Read the warnings when working in the en-
gine compartment > page 242.
— Handling the jump start cables incorrectly
may cause the vehicle battery to explode

and lead to serious injuries.

C) Note
Jump start cables can cause considerable
damage to the vehicle electrical system if
they are connected incorrectly.
@ Tips
— There must be no contact between the
vehicles, or else voltage could flow when
connecting the positive terminal and drain
the vehicle battery of the vehicle providing
the jump start.
— The drained vehicle battery must be con-
nected correctly to the electrical system.
— Switch off electrical equipment that is not
needed.
aT eile le)
Both jump start cables must be connected in the
correct order.

Fig. 181 Engine compartment: connectors for jump start
cables or a charger
294


Fig. 182 Connecting the jump start cables
The jump start cable connections are located in
the engine compartment.
Follow the information about the vehicle battery
=> page 252.
Connecting the positive cable (red) to the
positive terminal
> Open the red cover on the positive terminal
> fig. 181.
1. Attach one end of the positive cable (red) to
the jump-start pin @ © fig. 182 on your vehi-
cle.
2. Attach the other end of the positive cable
(red) to the positive terminal @) on the pow-
er source.
Connecting the negative cable (black) to the
negative terminal
3. Attach one end of the negative cable (black)
to the negative terminal @) on the power
source.
4. Attach the other end of the negative cable
(black) to the jump-start pin @ on the vehi-
cle.
Starting the engine
> Start the engine in the vehicle giving the charge
and let it run at idle.
> Now start the engine in your vehicle, which has
the drained battery.
> If the engine does not start, stop the starting
procedure after 10 seconds and then repeat it
after approximately 30 seconds.
> Turn on the rear window defogger in your vehi-
cle in order to reduce any voltage peaks that
may occur when disconnecting the jump start
cables. The headlights must be switched off. >

4K0012721BE

Fuses and bulbs


This can cause damage to the electrical sys-
tem and increases the risk of fire.
() Note
If a new fuse burns out again shortly after you
have installed it, have the electrical system
checked as soon as possible by an authorized
Audi dealer or authorized Audi Service Facili-
ty.
G@) Tips
— The following table does not list fuse loca-
tions that are not used.


— Some of the equipment listed in the follow-
ing tables applies only to certain model ver-
sions or certain optional equipment.
Fuse assignment - left footwell
Fuse panel @® (black)

4 |Engine components



S| Brake light sensor
6 |Engine valves
7 |Engine components
8 |Engine components
9 Engine components, 48 V water pump, 48
V drivetrain generator

10 | Oil pressure sensor, oil temperature sensor

Engine components, 48 V water pump, 48
11 |V drivetrain generator, 12 V drivetrain gen-
erator

12 | Engine valves, engine mount

13 | Engine cooling

14 | Engine control module, fuel injectors

Engine sensors, ignition coils, oxygen sen-
sors
15

RAZ-0195
ay
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Toren
BARRIER P ala


Fig. 188 Left footwell: fuse panel with plastic clip
The fuse assignment @) and @) is in the opposite
order on right-hand drive vehicles.
16 | Fuel pump






Fuse panel (2) (red)
No. | Equipment
1 |Anti-theft alarm system
2 | Engine control module
3 | Left front lumbar support
5 |Horn
6 | Parking brake
7 | Diagnostic interface
8 |Roof electronics control module
9 | Driver assistance systems control module
10 | Airbag control module
iW Electronic Stabilization Control (ESC), An-
ti-Lock Braking System (ABS)

12 | Diagnostic connection, light/rain sensor

Climate control system, vehicle electrical
1
3 system control module

14 | Right front door control module


Fuse panel (@) (black)
No. | Equipment

Climate control system compressor, vehi-
15
cle electrical system control module


Catalytic converter heating
Auxiliary battery control module, brake
16 ;
system pressure reservoir


2 |Engine components


Engine components

299

4K0012721BE

Luggage compartment lid with foot motion . 44

Panoramic glass roof............00 ee eee 48
SUTSHadE (FOOT): + wars a 2 womm a 2 cows © a rey 48
WWINOWS « wscsese 2 x aessee ov areene oo come mt oon 47
Closing aid (power closing doors).......... 35
Cockpit diMMiNg : « sea « = mews se pews se ey 58
Cockpit (OVErVieW) « » uss x vmx = vem e + sex 6
Collapsible spare tire................0.. 292
Collapsible tire
refer to Collapsible spare tire........... 292
GoloreGdebn: « » swe yz ame + sem oy neve ee 313
Combustion engine................---. 103
Coming home/Leaving home
refer to Entry/exit lighting.............. 56
Gommpact Spare tire = xcus: s x wens sy gems sx ae 292
Compartments.................0 2000005 85
Compass inthe mirror............-...0-- 63
Compliance ........ 0... ce eee ee eee 311
Confernencescallicser. « o ecszace sa soeseu 0 a memos «0 187
Configuration wizard...............-.00 20
COMMO CB ais 5 x susias ww amine a 8 wend & 8 inesains «wa 192
Data plans....... 0... ee eee eee ee 196
Datta Privacy'es ss sees se eeeis s beens spews 306
Emergency Call ssvises 2 3 woe se wee s voor 197
Infotainment
Infotainment services..............005 193
Online roadside assistance............. 198
Vehicle control services... uc... eee ee 194
Connected devices
Device overvieW........-... 00 e ee eee 235
Connections
Heer tO Medias < = ssc ss eae se eae 2204223
Consumer information............-.000+ 308
Consumption
ROGUGING « esay « x eee « u oes e aeee oe eR 103
Consumption (fuel) .......... 0.00 eee eee 17
Contacts
IMPOrtingcs « «cece ss ewes sees bee 189
Updating inthe MMI...............085 189
also refer to Directory................. 186
Convenience key......... 0.00 e eee eee eee 35
Convenience closing..............-+05. 48
also refer to Vehicle key.............0.. 39
Convenience opening and closing
Windows or panoramic glass roof........ 48
Coolant temperature display.............. 14
Cooling MOd etic. i = scciin ee ecenere ee serene wv omen 92
Cooling system
Adding
coolant................-000 ee 250
Checking the coolant level............. 250
GOOlANE svc 2 x oes ov ewe eo a 2 o oe 249
Cornering lighti:. » 2 ces: = ews: o ees ee eee 53
Cross traffic assist (intersection assistant) .. 157
Cruise control system............000005 135
Cup holders. ....... 0 cece eee eee eee 84
Current consumption.............-0 eens 17
D
Data module
Serial:number (IMED) ¢ esses ss saan ss cause 189
Data plans... .... eee eee eee 196
Data Privacy...... 0... s cee cece eee 306
Date... eee eee 17
SGttiliG's s savau 3 ¥ RAH s 4 BeueS 4 E RaER ¢ Esa 2:33:
Daytime running lights................-. 53
Declaration of compliance...........0005 311
DEF (instrument cluster)...............4- 12
Demo mode
refer to Presentation mode............. 210
Destination onthe map...............4. 203
Details, . a resco « sxanene os stineoue i 6 omens mo auncems 203
Determining correct load limit........... 271,
Digital:compass sass «seas oo save oo sare 2 63
DIM@NSIONS. « s ween « seems oy noes 6 2 ew & e 3:13
Dimming the exterior mirrors............. 59
Dimming the rearview mirror............. 59
Directory........ 0.0.02... cece eee eee ee 186
BUSINESS Cat dsiies + » news oe wows ¢ pawe ws BE 187
SOEGINGS
cscs « 2 mazes & nenseee « scene © © amt « 189
Display
Cleaning...........0 0. 283
Disposal..... 0.02... ce eee eee eee eee ee 308
DistamG@ sericea & ssseie ss owes so covnine oo creme @ os 17
Distance: warning csvevs © « sce vs sseoee wo senses 148
Doors
Child safety lock...................000. 46
DOOrCONntactSWitch » + ceau sv sees gc aeam a: 57
Mechanically unlocking and locking....... 38
Power closing/closing aid............... 35
Driver information system.............--. 13
317

Index

Drives
refer to Media.............000 eee 220, 223
Drive select
refer to Audi drive select............... 112
Drive systeM..... ee eee eee ee ee 103,105
Audi drive Select s cso 2 ¢ cawe 2 2 gence a ee 112
Driving down hills...............-0.00- 109
DriVinig Program. ¢ «mas xc ees + cess 99, 146
Driving through water............-..005 110
Driving time... 6... eee eee eee 17
Driving tips
Driving through water................- 110
Efficientdriving
¢ wuss « ¢ cows se cows xe ea 103
Offroad driving............. cee eee eee 110
Uphill and downhill................00. 109
Driving track. . 22... . ee eee eee eee 109
Drivinguphills................02..000. 109
DVDEARIVG is 1 3 cosnees «x cemeeas =o sammate = x amemens © © 221,
Dynamic all-wheel steering.............. 115
E
Esmaibesw 2 man ao mace a 2 oman a 2 ene oe eer 190
Settings.......... 0.0.0 c eee eee eee 190
EDL
refer to Electronic Differential Lock...... 117
EDR
refer to Event Data Recorder (EDR)...... 303
EfficieieyASSiStw: ¢ x sawa 5 2 waren sx mewn ge 136
Predictive Comtroleccine ss ansin < seein ev aanev 142
Electrical system ........-.-- 02 eee ee eee 251
Electromechanical parking brake......... 107
Electronic Differential Lock.............. 117
Electronic immobilizer.............000005 40
Electronic Stabilization Control........... L17
Embedded SIM card..............000008 193
EMergency*assist crocs oo: szenase © suetece « 0 sues 158
Emergency assistance seins ss soa + ciaseas a 6 i 286
Emergency braking function............. 108
Emergency call..............----- 188, 197
Emergency flashers............. eee eeeee 56
Emergency mode.........--.eeeeeeeeee 102
Emergency operation
DOOMS «= zavee ¢ = ems 2 eg see gs Sees 38
Fulfil do or es « eras 1 v wnausr i a wrens a ase 241
318
Luggage compartment lid............... 45
Panoramic glass roof............0e ee eee 49
Emissions control system..............- 241
ENergy CONSUMERS is 2s cree 2 areca eo aero os 17
Energy Managements « s ecw 6 waves wv viscous 104
Engine
Breakingin...........- ee eee eee e eee ee 103
GOOlSMit : seus i < saae 2 5 eee 2 Ree 2 eS 249
Emergentey Stopis: «= cow 6 sews v women sv oe 96
Jump starting. ........ 0... cee eee eee 293
Start/Stop system............-0000005 104
Starting/stopping.................008- 96
Engine compartment
Opening and closing the hood.......... 243
Overview... ... 0... eee eee eee 245
Safety precautions.................... 242
Engine data
refer to Sport displays.................. 16
Engine oil
AGGING « cvairers & avairane s H aamave © o revere & e ereree 245
Changing.......... 2. e eee eee eee eee 248
Checking oillevel.. s «eas ss news se news se 245
CONSUMPEOM ives «x asco vx sommes woo sues ow on 245
Indicator light.............0. ee eee 246
Replacement interval................. 255
Temperature display.............0.00.. 15
Engine sound
Audi drive:select:. . vsccon co ese ee mare ewe 113
Engine:startisystem siisces « ncena s © wassoe o 2 eas 97
Engine stop
refer to Start/Stop system............. 104
Entry/exit lighting................-. eee 56
Entry assiStance:. « 6 sees so ears ve wnvers 0 owe 67
also refer to Exit assistance............. 67
Environment
Unleaded gasoline..............2.-00. 238
ESC
refer to Electronic Stabilization Control... 117
ESC OFGaG wees 5 2 awons ¥ a eG 4d EEG a Re L1y
ESC SPOfitecs « s sews x = eaues ¥ cee Fe eee 117
eSIM
refer to Embedded SIM card............ 193
Event Data Recorder (EDR) « ex.s se cena sv 303
EXiti@SsiStance « sass 3 « neue ¢ 5 hewn eee es 67
Exit warning ..... 00. e cece ee eee eee 156
Exterior antenna...............0.0000. 184