2020 AUDI A5 check engine light

Checking and Filling

= Electrical system: malfunction! Safely stop
vehicle
Do not continue driving and switch the engine off
=> AX. See an authorized Audi dealer or authorized
Audi Service Facility for assistance.
= Electrical system: malfunction! Restart not
possible. Please contact Service
If you switch the ignition off, you will not be able
to restart the vehicle. Vehicle functions/driving
stability may be limited. Drive to an authorized
Audi dealer or authorized Audi Service Facility im-
mediately.
= Electrical system: malfunction! Please con-
tact Service
Switch off all electrical equipment that is not
needed. Vehicle functions/driving stability may
be limited. Drive to an authorized Audi dealer or
authorized Audi Service Facility immediately.
= Electrical system: low battery charge. Bat-
tery will be charged while driving
The starting ability may be impaired.
If this message turns off after a little while, the
vehicle battery has charged enough while driving.
If this message does not turn off, drive immedi-
ately to an authorized Audi dealer or authorized
Audi Service Facility.

Z\ WARNING
When there is an electrical system malfunc-
tion, vehicle functions may not work and driv-
ing stability may be limited, which increases
the risk of an accident. Stop driving and
switch the engine off. See an authorized Audi
dealer or authorized Audi Service Facility for
assistance.


Battery
Battery general information
Because of the complex power supply, all work on
batteries such as disconnecting, replacing, etc.,
should only be performed by an authorized Audi
dealer or authorized Audi Service Facility > A\.
230
Multiple batteries with different technologies
may be installed in your vehicle:
— Vehicle battery (for example, for starting the
engine, basic power supply) > page 231, Lead
battery or > page 231, Other battery types
— Auxiliary battery (for example, for recuperation
or optional equipment) > page 231, Other bat-
tery types
Not running the vehicle for long periods of
time
The battery will gradually drain if the vehicle
does not run for long periods of time. To ensure
that the vehicle can still be started, the electrical
equipment will be reduced or switched off
= page 107. Some convenience functions, such
as interior lighting or power seat adjustment,
may not be available under certain circumstan-
ces. These convenience functions will be available
again once you switch the ignition on and start
the
engine.
Even when electrical equipment is switched off,
the equipment can still drain the 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 battery. The battery
must be charged every month to prevent this
= page 232. Contact an authorized Audi dealer or
authorized Audi Service Facility for more infor-
mation.
Winter operation
Cold weather places higher demands on the bat-
tery. This results in reduced starting ability. Have
the battery checked by an authorized Audi dealer
or authorized Audi Service Facility before cold
weather begins.

ZA WARNING
— All work on the battery or electrical system
in your vehicle can result in injuries, chemi-
cal burns, accidents, or burns. Because of
this, all work must be performed only by an
authorized Audi dealer or authorized Audi
Service Facility.
— Never connect the charging cable or jump
start cable directly to your vehicle battery. >

Checking and Filling

Charging the battery

Fig. 171 Engine compartment: connectors for a charger or
jump start cables
Note the safety precautions > page 221, General
information, > /\ in Battery general informa-
tion on page 230 and > /\.
Requirement: only use chargers with a maximum
charging current of 14.8 volts. The battery ca-
bles remain connected.
The battery is located in the engine compart-
ment. The ground point ©) is always located on
the vehicle body.
> Switch off the ignition and all electrical equip-
ment.
> Open the hood > page 222.
> Press the release lever on the positive terminal
and fold the cover upward > fig. 171.
> Clamp the charger terminal clamps to the jump
start pins according to the instructions. (Pin un-
der the cover = “positive”).
> 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 222.

Z\ WARNING
— Never connect the charging cable directly to
your vehicle battery. Only use the connec-
tions in the engine compartment
=> page 232.

232

— 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.

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

B8W-0125



Fig. 172 Engine compartment: washer fluid reservoir cap
Follow the safety precautions > page 221, Gener-
al information.
The windshield washer fluid reservoir © contains
the cleaning solution for the windshield and the
headlight washer system > fig. 172, > page 223.
The reservoir capacity can be found in
=> page 284.
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.

8W7012721BA
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 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! will appear briefly
after 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.
Select on the home screen: VEHICLE > 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.
Select on the home screen: VEHICLE > Settings
& Service > Service intervals > Reset oil change
interval.
@) 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.
233

8W7012721BA
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-
it 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. 192 Driver's footwell (left-hand drive vehicle): fuse
panel with plastic clip
3
=f
= & a

x
Ss $ 2 8

Fig. 193 Front passenger's footwell (right-hand drive vehi-
cle): fuse panel with plastic clip


) (brown)
No. | Equipment

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

9 |Hot water pump, engine relay

10 | Oil pressure sensor, oil temperature sensor

Clutch pedal position sensor, engine start,
water pump
i

12 | Engine valves, engine mount

13 | Radiator fan


14 | Fuel injectors, engine control module

271

Index

Driving programs « = sscses x « soins wo soasmes © w vee 140
Driving through water...............005 112
DIVING CINe’s s « ees 5 e com s ean « pee a so 15
Driving tips
Driving through water................. 112
Efficient driving.............00- eee ee 107
Uphilland downhill................... 112
DFiVING Up Hills: < » cams zs saws to eee eo eee 112
Dust filter
refer to Pollutant filter................. 95
DyNamMie Steering « zeny + v sews s wrens + pees 115
E
E-mail
MessageOptionSten so sis 6 2 ames so eeu o 174
SettingS 0.6... cece eee eee eee 174
EDL
refer to Electronic Differential Lock...... 116
EDR
Event Data Recorder...............0.. 275
Efficiency assist.........2....02-000 ee 131
Electrical system. .........-. cee eee eee 229
Electromechanical parking brake......... 110
Electronic Differential Lock.............. Liz
ElectronicimmMobiliZetivcn. s & scsi av areas 6 ease 34
Electronic Stabilization Control........... 116
Embedded. SIM ard « csies ss sss sc cae sve 177
Emergency assistance...............-0. 260
Emergency braking function............. 111
Emergency call..............2200. 172,181
Emergency flashers.............2.-.000- 57
Emergency mode..............--00000- 105
Emergency operation
DOOrs 0... eee ee 32
Fueltillerdoor'ss + say « s nome o < ome a ¢ ae 220
Luggage compartment lid............... 40
Panoramic glass roof.............000005 43
Emissions control system...........005- 220
ERErQy CONSUMES! . «servis oo scesnce © enateny # ae 15
Energy Management’. « scisie + «ssw © ieee a» 107
Engine
Breakingin........... cee ee eee eee eee 106
GOOlANt sxe: 5 = gems x eee 2 s eeeE Ee EE 227
EmergencyStop's « « swsis «0 case oe rene & oe 100
Jump starting....................00. 266
288
Start/Stop system © cw... ese ve cee ee 107
Starting/stopping..............ee eee 100
Engine compartment
Opening and closing the hood.......... 222
OVEIVIEW's sees oo sees oo ees on eo @ 2 oe 223
Safety precautions............ 0. eee eee 221
Engine oil
Adding ......... 0. cece eee eee eee 223
CHANGING as = « cows « « cows a a news a x caw 2 226
Checking oil-level).... «cscs as west ao esoowse a 223
Consumption ...........0.0-.0 eee eee 223
Indicator light’: » wces «eos ss sews ee rows 224
Replacement interval................. 233
Temperature display................005 14
Engine sound
Audi drive select..................0.. 114
Engine Start/Stop mode
refer to Start/Stop system............. 107
Efigine Startisystem «in : seem es news & exe 101
Engine stop
refer to Start/Stop system............. 107
Entry/exit lightinGjas « « seus « « sayes « s meas a 2 Sf
Etitity ASSIStAnICE’s s 2 ews 5 2 eee § x epee a eRe 69
also refer to Exit assistance............. 69
also refer to Seats...... 0.0.0. cee eee 69
Environment
Unleaded gasoline............ eee eee 217
ESC Sport... 0.0... cece eee eee eee 118
eSIM
refer to Embedded SIM card............ 177
Event Data Recorder (EDR).............. 275
Exit assistance... 2.2... 60.0.0. cece eee ee 69
Exit WaPOiAGp esse + « sowie 9 0 conse +» eneieue © 8 arene IS2
EXteriOnantenina « was: x + wesw » x nse os canes 167
Exterior lig hitingiecs + + smwas % « somes w 2 amvane «0 see 54
Exteri@r MIPfOPS scsi = see = o ise 2 wom 2 2 60
Folding settings................00 ee eee 31
External voice operation..............-4. 25
F
Factory default settings
Multi Media Interface................. 214
Fast forwarding and rewinding (media files) . 204
Fast forwarding (media files)............ 204
FaStTOutels «cna « o anc © 6 ews +o airs © we 184