2021 AUDI A4 low oil pressure

Care and cleaning


follow the instructions from the car wash
operator.
—To reduce the risk of cuts, protect yourself
from sharp metal components when wash-
ing the underbody or the inside of the wheel
housings.
— After washing the vehicle, the braking effect
may be delayed due to moisture on the
brake rotors or ice in the winter. This in-
creases the risk of an accident. The brakes
must be dried with a few careful brake appli-
cations.

@) Note
— If you wash the vehicle in an automatic car
wash, you must fold the exterior mirrors in
to reduce the risk of damage to the mirrors.
—To reduce the risk of paint damage, do not
wash the vehicle in direct sunlight.
—To reduce the risk of damage, do not wash
decorative decals* with a pressure washer.
—To reduce the risk of damage to the surface,
do not use insect removing sponges, kitchen
sponges, or similar items.
— When washing matte finish painted vehicle
components:
— To reduce the risk of damage to the sur-
face, do not use polishing agents or hard
wax.
— Never use protective wax. It can destroy
the matte finish effect.
— Do not place any stickers or magnetic
signs on vehicle components painted with
matte finish paint. The paint could be
damaged when the stickers or magnets
are removed.
Power folding exterior mirrors* must only
be folded in and out using the power folding
function.
—To reduce the risk of damage to the rims
and tires, compare the width between the
wheels on your vehicle with the distance be-
tween the guide rails in the car wash.
—To reduce the risk of damage, compare the
height and width of your vehicle with the
height and width of the inside of the car
wash.
(*) For the sake of the environment
Only wash the vehicle in facilities specially de-
signed for that purpose. This will reduce the
risk of dirty water contaminated with oil from
entering the sewer system.
Cleaning and care information
When cleaning and caring for individual vehicle
components, refer to the following tables. The
information contained there is simply recommen-
dations. For questions or for components that
are not listed, consult an authorized Audi dealer
or authorized Audi Service Facility. Also follow
the information found in > A.
Exterior cleaning



Component Situation Solution
Windshield wiper | Deposits Soft cloth with glass cleaner, > page 59
blades
Headlights/ Deposits Soft sponge with a mild soap solution®
tail lights
Sensors/ Deposits Sensors: soft cloth with a solvent-free cleaning product
camera lenses Camera lenses: soft cloth with an alcohol-free cleaning sol-
ution
Snow/ice Hand brush/solvent-free de-icing spray >

256

8W1012721BC
Fuses and bulbs

@) 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-
t y.
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.

Fig. 184 Driver's footwell (left-hand drive vehicle): fuse
panel with plastic clip
3
=f
= & a

x
Ss $ 2 8

Fig. 185 Front passenger's footwell (right-hand drive vehi-
cle): fuse panel with plastic clip


f ) (brown)
No. | Equipment

1 | Catalytic converter heating

2 | Engine components

Exhaust doors, fuel injectors, radiator in-
let, crankcase housing heating

Vacuum pump, hot water pump, NOx sen-
4 |sor, particulate sensor, biodiesel sensor,
exhaust doors

Brake light sensor

6 | Engine valves, camshaft adjustment

Heated oxygen sensors, mass airflow sen-
sor, water pump

Water pump, high pressure pump, high
8 |pressure regulator valve, temperature
valve, engine mount

Hot water pump, motor relay, 48 V drive-
train generator, 48 V water pump

10 | Oil pressure sensor, oil temperature sensor

Clutch position sensor, 48 V drivetrain
11 |generator, water pump, 12 V drivetrain
generator

12 | Engine valves, engine mount


13 | Engine cooling

273

Fuses and bulbs






Fuse panel @) (brown) Fuse panel (© (black)
14 | Fuel injectors, engine control module 11 Left rear door control module, left rear
15 |Ignition coils, heated oxygen sensors power window
16 | Fuel pump 12 | Parking heater
Fuse panel (®) (red) Fuse panel (0) (black)
No. | Equipment No. | Equipment

Anti-theft alarm system

Front seat electronic, seat ventilation,
rearview mirror, rear climate control sys-

































tem control panel, windshield heating, di-
agnostic connection
2 Diagnostic interface, vehicle electrical sys-
tem control module
3 |Sound generator
4 |Clutch position sensor
5S |Engine start, emergency shut-off
6 Diagnostic connection, traffic information
antenna (TMC)
7 |USB input
8 |Garage door opener
9 Audi adaptive cruise control, distance reg-
ulation
11 | Front camera
12 | Right headlight
13 | Left headlight
14 | Transmission fluid cooling
Fuse panel (©) (red)
No. | Equipment
1 {Ignition coils
2 |Climate control system compressor
S |Left headlight
6 |Automatic transmission
7 |Instrument panel
8 | Climate control system blower
9 |Right headlight
10 | Dynamic steering
11 | Engine start



2 | Engine control module
3 Left front seat electronics, lumbar sup-
port, massaging seat
4 | Automatic transmission selector lever
5 |Horn
6 |Parking brake
7 | Diagnostic interface
8 | Roof electronics control module
9 |Emergency call module
10 | Airbag control module
11 Electronic Stabilization Control (ESC), An-
ti-Lock Braking System (ABS)
12 | Diagnostic connection, light/rain sensor
13 | Climate control system
14 | Right front door control module
15 | Climate control system compressor
16 | Brake system pressure reservoir
Fuse panel (©) (black)
No. | Equipment
Front seat heating
2 |Windshield wipers
Left headlight electronics
4 Panoramic glass roof / sliding/tilting sun-
roof
5 |Left front door control module
6 | Sockets
7 Right rear door control module, right rear
power window
All wheel drive control module
9 | Right headlight electronics
10 Windshield washer system/headlight

washer system control module

274

8W1012721BC
Index


Battery
Charging (12 Volt vehicle battery)....... 232
Vehicle battery (12 Volt)............... 230
Winter operation (12 Volt vehicle battery) . 231
BLOCK POU cei: «x were: oo ceamewe oo semen 2 o seems 187
BLOWN: sess: ¢ = seene « x wanes g 2 meee 5 2 ee 4 ee 92
Bluetooth
Audio playen snus « 2 sassws ae suesens ov srw 9 2 3 201
Connecting adevice..............0000- 214
Connecting a mobile phone............ 162
Deleting a device
Device overvieW............00-.0 eee
Disconnecting a device................ 214
Displaying profiles..................0. 215
Selecting adevice.............0..000. 214
Specifying a favorite.................. 215
Boost... 6... eee eee eee 15
Boost pressure indicator................. 15
Brake fluid
Checking the brake fluid level........... 229
BrakeS.. 0... eee eee 104
Brak@fluid(: = = sams = « eam = woven se pee as 229
Emergency braking function............ 106
0) 107
New brake pads............. 00s e eee 104
Braids « savay » © aaiwa & Raeoe ¢ & SanDR ES Se ES 216
Break-in security feature............00005 36
Breaking in
New brake pads..............----000- 104
NeWetiresis « wcuin as maces a meme a 2 emma ee 242
Browser
refer to Media center...............00. 204
Businessiaddressis i s, svessns sc scan a a veamiws a aa 187
c
California Proposition 65 Warning........ 222
Battery specific...............00-0 00 231
GALLUISE sacsse + ogsiese 0 9 axons 0 4 exexeus 4 2 anneew a 166
Cameras
Coverage areaS............-.0. 000000. 118
LOGAUIONS a: « ¢ apes ¢ nates 3 paee 5 x PEER GE 119
Capacities
Puelitankss sss so somes a sess @ o aves ¥ 0 ond 287
Washer fluid reservoir................. 287
Garwashh x 5 sews « onsmeus © scagens os ayers «6 @ some 255
Gatalytic converter « sis 2 weve eo wee ee cree 220
Cell phone
refer to Telephone............00 eee eee 162
Cell phone compartment
refer to Audi phone box............... 164
Central locking...... cece eee cree eee 33
AULOILOGK « coos 2 5 seme 5 5 ete so wows Go eG 33
Convenience key sie © « socsais 2 6 srvoem + 6 voese 38
Convenience opening and closing......... 46
Luggage compartment lid............... 4l
Mechanically unlocking and locking....... 36
MessageS ......--. 0c cece eects 35
Remote control key........:0ee eee ee eee 38
SEUNG’: © wave: s 2 wecems ve arene @ aetna ¥ ewee 34
Vehicle key... 0... cece eee ee eee ee 38
Central locking switch..............0000. 35
Ceramic Drakesinis © «cassie © x seve ¥ @ suena # ane 104
Certification): « . cee: ss wean ov enw os eee « 284
Charging
refer to Power sourceS..........-.000005 82
Charging the battery
Mobile devices..................00005 202
USB': « meme 2 ¢ anus © naueu & x REINS & ¥ ORE & 165
Witelessis «secs x x woos 2 v cervaue a x stone 2 9 oon 165
Child safety lock
Climate control system controls in the rear. 44
POWEr WINDOWS! si: = © xsnas 4 § Seen & & Maram 4 es 44
Rear dOOrsis + o omc sc sami oo me oases 44
Child safety seats..............---.00005 76
Securing to the top tether anchor........ 80
Securing with a safety belt.............. 79
Securing: with LATCH s « sw « & nome « ¢ sans « 78
ClEATIAG saves 5 x nore 5 2 wows ot eee xe eee 255
Cleaning Alcantara.............-.00000. 258
Cleaning artificial leather............... 258
Cleaning carbon components........ 257, 258
Cleaning controls..................005. 258
Cleaning decorative parts andtrim........ 257
Cleaning exhaust tail pipes.............. 257
Cleaning plastic parts...........00 eee 257
Cleaning textiles = cass ¢ & exes ¢ cae se ees 258
Climate control system ............00000- 90
also refer to Automatic climate control sys-
GNA. 2 execs © 2 ceeueve = ueueat © + steams © meme = © 90
Climate control system controls in the rear
Child safety lock........... 0. cece eee 44
289