2021 AUDI A7 check engine

Checking and Filling

arging the 12 Volt vehicle battery

Fig. 168 Engine compartment: connectors for a charger or
jump start cables
Observe the safety precautions > page 259, Gen-
eral information, > A\ in Battery general infor-
mation on page 270 and > /A\.
Requirement: only use chargers with a maximum
charging current of 14.8 volts. The battery ca-
bles remain connected.
The charging cable connections are located in the
motor compartment. The ground point ©) is al-
ways located on the vehicle body.
> Switch off the ignition and all electrical equip-
ment.
> Open the hood > page 261.
> Press the release lever on the positive terminal
and fold the cover upward > fig. 168.
> Clamp the charger terminal clamps to the jump
start pins according to the instructions. (Hex
head bolt under a cover @), ground point on the
vehicle body ©)).
> Insert the power cable for the charging device
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 charging device terminal clamps.
> Close the cover on the positive terminal.
> Close the hood > page 261.

Z\ WARNING
— Never connect a charging cable or jump
start cable directly to the 12 Volt vehicle
battery. Only use the connections in the en-
gine compartment > page 272.

272

— A highly explosive mixture of gases can form
when charging batteries. Only charge the
battery in well-ventilated areas.
— A drained battery can freeze at tempera-
tures around 32 °F (0 °C). Do not charge or
use a frozen or thawed battery. If ice forms,
the battery housing can crack and battery
electrolyte can leak out, which increases the
risk of an explosion and chemical burns.
Contact an authorized Audi dealer or author-
ized Audi Service Facility for more informa-
tion.
— Do not connect or disconnect the charging
cable while charging because this increases
the risk of an explosion.

@ Tips
Read all of the manufacturer's instructions
for the charger before charging the battery.
Windshield washer
system

B4M-0135)


Fig. 169 Engine compartment: washer fluid reservoir cap
Observe the safety precautions > page 259, Gen-
eral information.
The windshield washer reservoir © contains the
cleaning solution for the windshield and the
headlight washer system* > fig. 169,
=> page 262. The reservoir capacity can be found
in > page 332.
To reduce the risk of lime scale deposits on the
spray nozzles, use clean water with low amounts
of calcium. Always add window cleaner to the wa-
ter. When the outside temperatures are cold, an
anti-freezing agent should be added to the water
so that it does not freeze.

4K8012721BF
Checking and Filling

Messages
g 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 acertain 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.
273

4K8012721BF
Wheels


— Do not change the tire pressure when the
temperature of the tire is extremely high.
This could result in serious damage to the
tire and even cause the tire to burst, increas-
ing the risk of an accident.
— A tire with low pressure flexes more. This
heats the tire up too much. This could cause
the tread to separate and even cause the tire
to burst, increasing the risk of an accident.
— The tire pressure monitoring system does
not warn about damage or defects in the
tire construction that could cause the tire to
burst, for example. Inspect your tires regu-
larly.

@ Tips
—If tires are replaced, the sensors and valves
do not need to be removed or replaced. Only
replace the valve stem and, if necessary, the
valve and the wheel electronics. If you have
questions, see an authorized Audi dealer or
authorized Audi Service Facility.
— An incorrect display or a malfunction in the
tire pressure monitoring system can occur
after using the tire mobility kit*. Have the
sensors replaced by an authorized Audi
dealer or authorized Audi Service Facility.
— The system complies with United States FCC
regulations and ISED regulations
=> page 329.
Displaying tire pressures and temperatures
Applies to: vehicles with tire pressure monitoring system
Requirement: you must be driving the vehicle.
> Applies to MMI: Select on the home screen: VE-
HICLE > Settings & Service > Tire pressure
monitoring > Display tire pressure.
The current tire pressures are shown in green,
yellow, or red numbers:
— Green: the current tire pressure and the speci-
fied tire pressure are approximately the same.
— Yellow: the current tire pressure is lower than
the specified tire pressure.
— Red: the current tire pressure is much lower
than the specified tire pressure.
The specified tire pressure is the last tire pressure
that was stored > page 296.
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 294.
@ 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.
Tire pressure loss
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 296.
@ 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 294.

295

4K8012721BF
Emergency assistance

To benefit fully from the advantages of the uni-
directional tire design, you should replace faulty
tires as soon as possible and restore the correct
running direction on all of the tires.
> Reinstall the caps on the wheel bolts if necessa-
ry.
> Store the vehicle tool kit in its designated
place.
> If the removed wheel does not fit in the spare
wheel well, store it securely in the luggage
compartment > page 83.
> Check the tire pressure on the installed wheel
as soon as possible.
> Correct the tire pressure and store it in the MMI
=> page 293 or > page 296.
> The wheel bolt tightening specification must be
90 ft lbs (120 Nm). Have it checked as soon as
possible with a torque wrench. Drive carefully
until then.
> Have the faulty wheel replaced as quickly as
possible.
Space-saving spare tire
Applies to: vehicles with space-saving spare tire (compact
spare tire)
The spare tire is intended for short-term use only.
Have the damaged tire checked and replaced if
necessary by an authorized Audi dealer or author-
ized Audi Service Facility as soon as possible.
There are some restrictions on the use of the
compact spare tire. The compact spare tire has
been designed specifically for your type of vehi-
cle. Do not replace it with the spare tire from an-
other type of vehicle.
The compact spare tire is located in the luggage
compartment under the cargo floor cover
=> page 305.
The tire pressure must be adjusted to a specified
value listed on the tire pressure sticker
= page 284, fig. 173.
Snow chains
For technical reasons, the use of snow chains on
the compact spare tire is not permitted.
If you have to drive with snow chains and a front
tire fails, mount the 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.

ZA WARNING
— After installing a spare tire, the tire pressure
must be checked as soon as possible.
— Do not drive faster than 50 mph (80 km/h)
with a compact 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 compact spare tire.
— To reduce the risk of an accident, never drive
with more than one compact spare tire.
— Normal summer or winter tires must not be
mounted on the compact spare wheel rim.

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.
311

Emergency assistance


ZA\ 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,
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 259.
— Handling the jump start cables incorrectly
may cause the vehicle battery to explode
and lead to serious injuries.

@) Note
— Jump start cables can cause considerable
damage to the vehicle electrical system if
they are connected incorrectly.
— Plug-in hybrid drive: You must not give a
jump start with your vehicle. This could
cause significant damage to the electrical
system in your vehicle.
G) 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.
312
ae eielaalale]

Both jump start cables must be connected in the
correct order.

Fig. 186 Engine compartment: connectors for jump start
cables or a charger



Fig. 187 Connecting the jump start cables
The jump start cable connections are located in
the engine compartment.
Follow the information about the vehicle battery
=> page 270.
Connecting the positive cable (red) to the
positive terminal
> Open the red cover on the positive terminal
> fig. 186.
1. Attach one end of the positive cable (red) to
the jump-start pin @ © fig. 187 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. >

4K8012721BF

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
i
Toren
BARRIER P ala


Fig. 192 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

317

4K8012721BF

Cleaning carbon components........ 300, 302
Cleaning control « sisis + wee x x dearim & mane 301
Cleaning decorative parts andtrim... 300,301
Cleaning exhaust tail pipes.............. 300
Cleaning plastic parts.................. 301
Cleaning textiles..............-. eee eee 301
Climate control system ............00000. 87
Climate control system controls in the rear
Child Safety \OCKicw: ¢ : nee 5 2 cones ¥ 2 owen gy 46
Closing
Automatic luggage compartment lid...... 44
Convenience Closingtos « a sss « sazene 0 © emuvee 48
HOOd .. 0... cece eee 261
Luggage compartment lid............... 44
Luggage compartment lid with foot motion . 45
Panoramic glass roof..............2-00. 48
Sunshade (POOP) 's « wows « « sews se wows oo wes 48
WANGOWS « wscaic 2 2 conto seats 6% mice oo on 47
Closing aid (power closing doors).......... 36
COaStiNng wes + saeu ss eee & 5 eee ee eee ee 101
Cockpit’ diMMiINnG s « ves se mews se wees 8 2 oy 57
Cockpit (OVErvieW) si inca cs icea cca s crea 6
Color code... . cece cece ee eee ee eee eee 331
Combustion engine.................4-5 100
Combustion engine startup............... 98
Comfort auxiliary climate control.......... 91
Coming home/Leaving home
refer to Entry/exit lighting.............. 55
Compact spare tire...............00.004 311
GCOMpartMents:,
« « secs « = saree © « cesuwte ® 9 wore 83
Compass:in'thesmitron's « sss s sccnens ss aysewcs a 61
GCompliance:: « seve 2s weve sv wews ye eee oo: 329
Gonferetice Callow. » x sums ¢ o eames x weer ao 203
Configuration wizard.................04. 21
CONNECE. 1... ee eee 208
Data plans. 2 wow 2 s avon oe wows 2 woe g ve 212
Datta PRIVACY + « xaos oo emanate © exatannie © viata 324
Emergency call.............2.-.0000- 213
InfotainMentss « + wea vs wewy a x eeu 4 2 won 208
Infotainment services..............004 209
Online roadside assistance............. 214
Vehicle control services.............005 210
Connected devices
DevViceiOVvervieW. cies: so eae: av mewn @ ¥ ism 2511,
Connections
refer to Media..............00005 236, 239
Consumer information.................. 326
Consumption
Reducing........... eee eee ee eee eee 103
Consumption (fuel) . . srerice © cssese we secs ws we L?
Contacts
Importing .......... 0. cece eee ee eee 205
Updating inthe MMI.................. 205
also refer to Directory...............4. 202
Convenience keyls «oases ss sia e 6 sii so woes 36
Convenience closing.............000005 48
also refer to Vehicle key..............-. 40
Convenience opening and closing
Windows or panoramic glass roof........ 48
Coolant temperature display.............. 14
Cooling mode........ 6... eee eee 88
Cooling system
Adding
coolant’: sews 2 s wanes ss seme + a ew 267
Checking the coolant level............. 267
Coolant... ... eee eee eee eee 266
GOPMERIMOIGM Biss» « seesece # « sovsece aw enetete # 0 asin 52
Cross traffic assist (intersection assistant) .. 173
Cruise control system.............22005 151
Guptholdersienc «osu oo ew vs een oe em y 82
CuUrreNnECOnSUMPtION wes s wees s eewe gs eos LZ
D
Data module
Serial number (IMEI) ...............005 205
Data plans sesovs 2 sana 2 2 meen 6 ware © eee 212
Data: PrivaGy’s « sees 9 ¢ eames ¢ o ewe ss ew Gs 324
Date coos 3 meee 2 ¥ agen ¢ 2 EY SE @ae 2 RES 1?
SOtUING so omsccas iv onewens vw amie © Hartree wv oes 249
Daytime running lights.................. 52
Declaration of compliance............... 329
DEF (instrument cluster) .............0004 12
Demo mode
refer to Presentation mode............. 226
Destination onthe map................. 219
D@tailSix = 3 amex < eam oy seven ¢ s seme « ¢ see 219
Determining correct load limit........... 288
Digital compass............. cece eee eee 61
Dimensions ...........00 cece 331
Dimming the exterior mirrors............. 58
Dimming the rearview mirror............. 58
335

Index

Diteetor yess 6 s cscaves ws sacewes v6 aneims v © sxeams 6 0 202
Business card... 6... eee eee eee 203
SCttinGSanww + wuwn x 3 mee ee ReUeE SE eee & 205
Display
Cleaning’s « «sew 2s seas © 2 eww vo ene woe 301
DispOSalis: + = secre 5 5 was 5 ¥ ees eo ee Ge 326
DistanG@ies = : ees = : wes ¢ 2 eee Yo ewe Ye: 17
Distance WarhiiG sca + < sees 2 3 has os eS 164
Doors
Childisafety lock sxe < « same s » ews = 2 eres = 46
Door:comtact:switeh i « sess 2s sansa vo scares a 5 56
Mechanically unlocking and locking....... 39
Power closing/closing aid............... 36
Driver information system................ 13
Drives
refer to Media... ...s0scceees eens 236; 239
Drive select
refer to Audi drive select............... 111
Drive'SySteMm « sessen « swswss 6 2 cae 3 ¥ a0 100, 105
Audi drive select..............000000- 111
DrivingiGOwniBills ecerese © versus ie o vvasene a + wavess 109
Driving programs « x saves vo meses xo esas 6 96, 162
Driving through water............-...0- 110
Driving’ CUIMGls « « seme ss eee so ees eae a 17
Driving tips
Driving through water................- 110
Efficient driving. ..........00 eee ee eee 103
Uphill ahd Gownhill we » s wore 2 x eae o 2 caer 109
Driving track. . 2.2... ee eee ee eee eee 109
Driving uphills...................0000. 109
DVD drive... .. 0.2.02. eee 237
Dynamic all-wheel steering.............. 113
E
BERL l « cncmena eo wwesien we meres so sete sw cane 206
Settings........... 0... e eee eee eee 206
EDL
refer to Electronic Differential Lock...... 115
EDR
refer to Event Data Recorder (EDR)...... 321
Efficienity a8SiSbies « caw x x eews vo eam ex 152
Predictive Comtrobsisin: 0 o seve w scum 2 v sueawe 158
Electrical:system’. « « wessce so wena ee ene soe 269
Electric ranges s ¢ evans s+ meas s ¥ cae 5 2 meee 224
Electromechanical parking brake......... 107
Electronic Differential Lock.............. 116
336

Electronic immobilizer .............0.004. 41
Electronic Stabilization Control........... 115
Embedded SIM: card « « saws x « wwe x s gue 8 209
EMergency:aSsist sasws s ness 3 5 nee so teeE 174
Emergency assistance..............-... 305
Emergency braking function............. 108
Emergency call..............000.. 204, 213
Emergency flashers.............--..00-- 55
Emergency fueling............--..20005 257
Emergency M0de esc + secs es ences oo acee 3 99
Emergency operation
Doors... 2... eee eee eee ee 39
FUSLTINLERGGOF sx ¢ « casas» 2 news a 3 mae 2 a 258
Luggage compartment lid............... 46
Panoramic glass roof.............200005 49
Emissions control system.............. 259
EMeErgy CONSUMENSHs «i iii + asus oo eacem wo 8 18
Energy flow display® wees ¢ s wees s 6 ween s ve 102
Energy management.................5. 104
Etergy TECOVERYase « 2 caps 5 « smerny 5 o eye 101
Engine
Breaking'inl's « sevas « ¢ saves « » newer x 2 Mowe @ 100
COOLANE «, cassne « « snawins = w eeawens © a temsem « areneten 266
Emergency stop. ... 0.06... eee ee eee eee 93
JUMP Starting « + mews s x eews 5 a sowe 4 eee 311
Start/Stop system............-0000005 104
Starting/stopping.............0...00ee 93
Engine braking effect
refer to Recuperation...............-. 101
Engine compartment
Opening and closing the hood.......... 261
OVERVIOW'. score na sesrene a w eaesere oo sieeern a 8 ae 262
Safety precautions..............00000 259
Engine data
refer to Sport displays .............0065- 16
Engine oil
AGING « ccs scorn 2 3 ceveum eo aman oe Eos
Changing
Checking oillevel.............2--000-- 262
CONSUMpPtiON ss ¢ ¢ eees ¢ eee oo ee oo 262
Indicator light........... 0. cece eee eee 263
Replacement interval................. 273
Temperature display................0-. 16
Engine sound
Audi drive:selectii: « ccine os vomem 2 seas ¥ as 112
Engineistartsystem vce + acs 6 2 wanes 6 2 vonse 94