2021 AUDI Q2 check engine light

Table of Contents
Audi smartphone interface 253
Setting up
253

How to use 254
Troubleshooting 254
System settings 255
Setting the time and date 255
MMI settings 255
Connection manager 257
System update 259
On-board Handbook 260
Sound settings 260
Volume settings 261
Restarting the MMI system 262
Notes on software licences 262
Safety 263
Safe driving 263
General notes 263
Correct sitting positions 265
Child seats 267
Fitting child seats 270
Pedal area 272
Stowing luggage safely 272
Seat belts 275
Why is it so important to use seat belts? . 275
Forces acting in a collision 276
How to wear seat belts properly 277
Belt tensioners 279
Airbag system 281
Description of airbag system 281
Front airbags 282
Side airbags 285
Head-protection airbags 286
Deactivating the front passenger's airbag 288
Service and care 289
Checking and topping up fluids . 289
Fuel 289
Filling the tank 290
Selective catalytic reduction (AdBlue/
DEF) 292
Emission control systems 295
Engine compartment 295
Engine oil 297
Cooling system 299
Brake fluid 301
Battery 302
Windscreen washer 303
Service interval display 304
Wheels 305
Tyres and rims 305
Tyre pressure loss indicator 309
Care of vehicle and cleaning 312
General notes 312
Washing the vehicle 312
Notes on cleaning and care 313
Taking the vehicle out of service 317
Self-help 318
Mobility 318
General notes
318

Equipment 318
Tyre repair kit 319
Changing a wheel 321
Spare wheel 324
Jump-starting 326
Tow-starting / towing away 328
Fuses and bulbs 332
Fuses 332
Bulbs 334
Changing headlight bulbs 336
Changing bulbs for rear lights 339
Technical data and accessories .. 340
Accessories and modifications
to the vehicle 340
Accessories, replacement parts and
repairs 340
Modifications 340
Radio transmitters and business
equipment 340
Technical data 342
Vehicle identification data 342
Explanation of technical data 342
Dimensions 343
Capacities 343
Weights 343
Engine data 344
4

Instruments
and
controls
The brakes
may
perform differently than usual
and
the
brake pedal may vibrate.
Drive
to
a qualified workshop without delay
and

have
the
fault rectified.
A WARNING
- Before opening
the
bonnet and checking
the

brake fluid level, observe
the
warning infor­
mation
on
*$page
295,
Working
on
compo­
nents
in the
engine compartment.
-
If
the brake warning lamp does
not go out,

or
if it
lights up when driving,
the
brake
flu­

id level in
the
reservoir
is too low -
this
may

cause an increased accident risk. Stop
the

vehicle and
do not
drive on. Obtain profes­
sional assistance.
-
If
the brake warning lamp lights
up
togeth­
er with
the
ABS indicator lamp and
the
ESC
indicator lamp, this can mean that
the
con­

trol function
of
the ESC/ABS
is not
working.
Input from
the
functions that stabilise
the

vehicle
is no
longer available. This could
cause
the
tail of
the vehicle
to
skid
side­

ways.
Do not
drive on. Obtain professional
assistance.

(®)/0
Electro-mechanical parking brake
The warning lamp
||
lights
up
when
the
parking
brake
is
applied.
If the warning lamp
||
flashes, insufficient brak­
ing force
has
been applied
or
released. Select
first gear (manual gearbox)
or
position
P
(auto­
matic gearbox)
as an
additional safeguard. Make
sure that
the
warning lamp has gone
out
before
you drive
off.

2J
Parking brake!
There
is
a malfunction
in the
parking brake. Drive
to a qualified workshop soon
and
have
the
fault

rectified.

[ft]
Parking brake auto release: unavailable
If this message appears, press
the
brake pedal
and then release
the
parking brake.
If the warning lamp flashes and
the
message
ap­

pears,
the
brake
may not be
strong enough
to

hold
the
vehicle. The brakes have overheated.
The vehicle can roll away, even
on a
gentle slope.
©J Parking brake is applied
If this message appears, press
the
brake pedal
and then reLease
the
parking brake
as
necessary.
For further information
on the
parking brake
refer
to
^>page
82.

•as
Cooling system

| Switch
off
engine and check coolant level.
See owner's manual
The coolant level
is too low.

Switch
off
the engine and
do not
drive on. Check
the coolant level
^>page
299.

-
If
the coolant level
is too
low, add more coolant

^>page
300. Do not
drive
on
until
the
warning
lamp has gone
out.

| Coolant temperature too high! Let engine
run with vehicle stationary
Let
the
engine cool down
by
running
it at
idling
speed
for
a
few
minutes until
the
warning lamp
goes
out.

-
Do not
drive
on if
the warning lamp does
not

disappear. Obtain professional assistance.

JgJ
Caution:
Vehicle parked
too
steep
A WARNING
- Never open
the
bonnet
if
you
can see
or
hear
steam
or
coolant escaping from
the
engine
compartment; there
is
a risk
of
being
scal­

ded.
Wait until you
can no
longer see
or

hear escaping steam
or
coolant.
-The engine compartment
of
any motor
vehi­

cle
is
a dangerous place. Before carrying
out

any work
in the
engine compartment, switch
off the engine and allow
it to
cool down.
Please observe
the
important safety warn­
ings
^>page
295,
Working
on
components
in
the
engine compartment.
30

Instruments and controls
© CAUTION

CO
<
O
rN
iv
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•-i

00
Do not drive on if the warning lamp || lights

up;
otherwise there is a risk of engine dam­

age.

t^
Engine oil pressure
| Switch off engine! Oil pressure too low
Switch off the engine and do not drive on. Check
the engine oil level
^>page
298.
- If the engine oil level is too low, add more oil

tapage
297. Do not drive on until the warning
lamp has gone out.
-If the engine oil level is OK
but
the warning
lamp still lights up, switch off the engine and
do not drive on. Obtain professional assistance.
© Note
The oil pressure warning lamp is not an
indi­

cator for the oil level. The oil level should
therefore be checked regularly.

C3
Alternator/vehicle battery
| Electrical system: fault. Battery is not being
charged
There is an alternator fault or a fault in the
vehi­

cle's electrical system.
Drive to a qualified workshop without delay.
However, you should avoid using electrical equip­
ment that is not absolutely necessary because
this will drain the battery. If the battery charge is
insufficient, obtain professional assistance.

S
Electrical system: fault. Please contact
workshop
Drive to a qualified workshop without delay.
Avoid using electrical equipment that is not abso­
lutely necessary (such as the radio) because this
will drain the battery. If the battery charge is in­
sufficient, obtain professional assistance.

y
Electrical system: low battery charge. Bat­
tery will be charged while driving
Starting reliability may be impaired.
If this message disappears after a while, the ve­
hicle battery will have been sufficiently charged
while driving.
If the message does not disappear again, drive to
a qualified workshop without delay and have the
fault rectified.

2f
Safety systems
The indicator lamp

terns.

monitors the safety sys-

If
the indicator lamp
Ej
lights up or flashes,
there is a malfunction in one of the safety sys­

tems.

Drive to a qualified workshop without delay and
have the fault rectified.

A
WARNING
Have the safety systems examined without
delay; otherwise they may fail to trigger in an
accident - this could result in serious or possi­
bly fatal injury.

A
Front seat belt
The warning lamp|| lights up and does not go
out until the driver's and front passenger's* seat
belts have been fastened. When the vehicle has
gathered speed you will also hear a warning

chime.

Note
For further information on the seat belts

•=>
page 275.

y/4
Rear seat belt
Applies to: vehicles with seat belt warning system (rear seats)
If a rear seat belt is buckled/unbuckled, the cor­
responding indicator Lamp Lights up briefly.

||
- If the indicator lamp lights up briefly, the
corresponding rear seat is not occupied.

|/RI|-
If the indicator lamp lights up briefly,
the rear seat belt has been fastened.
| /
KJ
"
Ifthe
warning lamp flashes, the seat
belt has been unbuckled with the vehicle moving.
31

Instruments and controls

CO

< o rN
iv
rN
•-i

00

£=s
Bonnet
| Warning! Bonnet not locked. Stop vehicle
and check bonnet lock
If the warning lamp lights up and the message
appears, the bonnet lock is not correctly engag­

ed.

Stop your vehicle without delay and close the
bonnet
^page
296.

f*lu
Electronic stabilisation control (ESC)
If the indicator lamp
§jj
flashes while the vehicle
is in motion, the ESC or traction control system
(ASR) is intervening.
If the indicator lamp
§|j
lights up, the ESC sys­
tem has been switched off for system reasons. In
this case, the ESC can be reactivated by switching
the ignition off and then on again. If the indica­
tor lamp goes out, this means the system is fully

functional.

If the indicator lamp
|g
lights up, the ESC sys­
tem has been partially or completely switched off
via the
J^OFF
button
^>page
145.
Stabilisation control (ESC/ABS): fault! See
own­

er's manual
If the indicator lamp
§§J
and the ABS indicator
lamp
EJ
light up and the message appears,
there is a malfunction in the anti-lock brake sys­
tem or electronic differential lock. This will also
cause an ESC malfunction. The vehicle can still be
braked in the normal way (however the ABS
con­

trol function will be out of action).
Drive to a qualified workshop without delay and
have the fault rectified.

(T)
Note
For more information about the ESC and ABS
systems, refer to
^>page
145.

O Brake
pads

S
Brake pads!
The brake pads are worn.
Drive to a qualified workshop without delay and
have the brake pads checked.

*S
Hill hold assist

|§i
Hill hold assist: unavailable
If this message appears, the hill hold assist is un­
available.
Manual control!
If this message appears, press the brake pedal.
Use the parking brake for the hill start

^>page
82.

<^b
Engine management
Drive system: fault. Please contact work­
shop
If the indicator lamp
Qg
lights up, there is a fault
in the engine management system.
Drive slowly to a qualified workshop without de­
lay and have the engine checked.
EPC Engine management
Applies to: vehicles with petrol engine
If the indicator lamp
\$fi
lights up, there is a
fault in the engine management system.
Drive slowly to a qualified workshop without de­
lay and have the engine checked.

W
Engine management
Applies to: vehicles with diesel engine
If the
indicator
Lamp
|jjj
Lights up when the
igni­

tion is switched on, the glow plugs are preheat­

ing.

If the indicator lamp does not light up or if it
flashes while the vehicle is moving, there is a
fault in the engine management system.
Drive slowly to a qualified workshop without de­
lay and have the fault rectified.

O
Emission control system
If the indicator Lamp
£3 Lights
up or flashes, a
fault has occurred which can reduce the quality of •
33

Instruments and controls
the exhaust gas and damage the catalytic
con­

verter.
Drive slowly to a qualified workshop without de­
lay and have the fault rectified.
Diesel particulate filter
Applies to: vehicles with diesel particulate filter

|
Particulate filter: system fault. See owner's
manual
The diesel particulate filter requires regenera­

tion.
You can assist the self-cleaning function of
the filter by driving as follows:
Drive at a speed of at least 60 km/h for about
15 minutes in 4th or 5th gear (on vehicles with
manual gearbox), or with the selector lever in po­
sition S (on vehicles with automatic gearbox).
Keep the engine speed at about 2000
rpm.
As a
result of the increase in temperature, the soot in
the filter will be burned off. The indicator lamp
will go out once the cleaning process has been
completed successfully.
If the indicator lamp does not go out, drive to a
qualified workshop without delay and have the
fault rectified.
A WARNING
It is essential that you adjust your speed to
suit the weather,
road,
terrain and traffic
con­

ditions. The recommended driving speed
must never lead to the driver disregarding the
traffic regulations.

(T) Note

For more information about the diesel partic­
ulate filter, refer to
^>page
295.
!
»
Engine speed governing
Applies to: vehicles with engine speed governing
[51 Max. engine speed: XXXX rpm
The engine speed will automatically be governed
to the speed displayed in the instrument cluster.
This protects the engine from overheating.
The rev limiter is deactivated as soon as the en­
gine temperature is no longer within the critical
range and you have taken
your
foot off the accel­
erator.
If the rev limiter has been activated because of a
fault in the engine management system, the in­
dicator lamp
Q or[|2g
will also light up. Make
sure that the engine speed does not exceed the
speed displayed in the driver information system,
for example when shifting down a gear. Drive to
a qualified workshop without delay and have the
fault rectified.
Engine oil level
(MIN)
23
Please check oil level
You can continue driving for the time being but
you should check the engine oil level as soon as
possible
<^page
297.
- If the engine oil level is too Low, add more oil

^>page
298, Checking and topping up the en­
gine oil level.
- If the engine oil level is normal but the indica­
tor lamp stays on, drive to a qualified workshop
without delay and avoid high engine speeds.

ST
Engine oil sensor

3
Oil level sensor: system fault
The sensor for checking the engine oil level has

failed.
Drive to a qualified workshop soon and
have the fault rectified.

3
Oil level sensor: oil change required. Please
contact workshop
The engine oil level is too
high.

Drive to a qualified workshop without delay and
have the fault rectified.
CAUTION
Please observe the procedure described in the
Owner's Manual
^>page
298, Checking and
topping up the engine oil level.
f Engine warm-up
requested

Please warm up engine
34

Doors and windows
Set of keys



service work is required. This also applies to
vehicles with convenience key*.

Fig.
21 Keys supplied with the vehicle
Remote control keys
The remote control key can be used to lock and
unlock the car. Press the release button
OFig.
21
-arrow- to make the key spring out of the handle
and to fold it back in.
Number of keys
You can check how many keys are initialised for
your vehicle using the infotainment system. To
do so, select:
|MENU|
button > Car
>
left control
button
>
Servicing & checks
>
Car information.
This feature enables used car buyers to make
sure they have received all of the keys.
Replacing a key
If
you
should lose a key, please contact an Audi
dealer. Have the remote control coding for that
key deactivated.
For
this purpose you should
bring all available keys with you. It is also impor­
tant to notify your insurance company if
a
key has
been lost.
Electronic immobiliser
The immobiliser is designed to prevent unauthor­
ised persons from driving the vehicle. It may not
be possible to start the engine with the key if
there is another ignition
key
from a different
make of vehicle on the same key
ring.

Data stored on remote control key
Data related to the service and maintenance of
the vehicle are stored continuously on your re­
mote control key. Your Audi dealer can read out
the data and will then be able to tell you what
The function of the remote control key may
be impaired by interference from other
near­

by radio signals (for example from a mobile
telephone or TV transmitter) if these are in
the same frequency range.
LED and battery for the remote control key

Fig.
22 Remote control key (rear): Opening the cover
LED on remote control key
The LED on the remote control key lights up
when you press the buttons.

•
The LED should flash once when you press one
of the buttons briefly.

•
The LED should flash repeatedly when you
press and hold one of the buttons (convenience
open/close).

•
If the LED does not flash, the battery in the re­
mote control key is flat. In addition, the indica­
tor lamp |y will light up and the message Re­
mote control key: please change key battery
will appear. Replace the battery in the remote
control key.

Replacing
the battery for the remote control
key
• Use a coin to lever the cover (2) off the key
®
=>
Fig.
22.

•
Insert the new battery with the "+"
symbol
fac­
ing up.

•
Press the cover back onto the key until it clicks
into place. •
38

Driving
Driving
General notes
Running in
A new vehicle should be run in over
a
distance of
1,500 km. For the first 1,000 km the engine
speed should not exceed 2/3 of the maximum
permissible engine speed - do not use full throt­
tle and do not tow a trailer or caravan. From
1,000 to 1,500 km you can gradually increase
the engine rpm and road speed.
During its first few hours of running, the internal
friction in the engine is greater than later on
when all the moving parts have bedded down.
How the vehicle is driven for the first 1,500 km
also influences the engine quality. After this
peri­

od you should continue driving at moderate en­
gine speeds, in particular when the engine is

cold.
This helps to reduce wear and tear on the
engine and increases the potential mileage which
can be covered by the engine.
You should also avoid driving with the engine
speed too low. Change down to a lower gear
when the engine no longer runs "smoothly". Ex­
cessively high engine speeds are prevented by an
automatic rev limiter.
A WARNING
After driving through water, mud, sludge,
etc., the braking effect can be delayed slightly
due to moisture on the discs and brake pads.
Applying the brakes carefully several times
will remove the moisture and restore the full
braking effect.
© CAUTION
- Parts of the vehicle (e.g. engine, gearbox,
running gear or electrical components) can
be badly damaged when driving through
water.
- Always switch off the start/stop system*

^>page
79 before driving through water.
© ' Note
- It is advisable to check the depth at the
deepest point before approaching the wa­
ter.
- Do NOT stop the vehicle, drive in reverse or
switch off the engine before you are out of
the water.
- Bear in mind that waves created by oncom­
ing traffic could exceed the permissible
wading depth of your vehicle.
- Avoid driving through salt water (corrosion).
Avoiding damage to the car
© CAUTION
Take care not to damage
Low-mounted
parts
of the car (such as the spoiler or exhaust sys­
tem) on steep ramps, uneven road surfaces or
roadside kerbs, etc. This applies especially to
vehicles with low ground clearance and to all
vehicles when fully laden.
Driving through water on roads
Please note the following in order to prevent
damage to the vehicle when driving through wa­
ter (e.g. on flooded roads):
- The water level must not be higher than the ve­
hicle's underbody.
- Do not drive faster than walking pace.
How to improve economy and minimise
pollution
Fuel economy, environmental impact and wear
on the engine, brakes and tyres depend largely
on the way you drive the vehicle. By adopting an
economical driving style and anticipating the
traffic situation ahead, you can reduce fuel
con­

sumption by 10
-15
%. The following section
gives you some tips on Lessening the impact on
the environment and reducing your operating
costs at the same time.
Anticipate well in advance
A car uses most fuel when accelerating. If
you
an­
ticipate hazards and speed changes well in ad­

vance,
you will need to brake less and thus accel­
erate Less. Wherever possible, Let the car slow
down gradually with a gear engaged, for •
72

Driving
instance when you can see that the next traffic
lights are red. This takes advantage of the engine
braking effect, reducing wear on the brakes and

tyres.
Emissions and fuel consumption will drop
to zero due to the overrun fuel cut-off.
Change gear early to save fuel
An effective way of saving fuel is to change up
quickly through the gears. Running the engine at
high rpm in the lower gears uses an unnecessary
amount of
fuel.

Applies to: vehicles with manual gearbox
Shift up to second gear as soon as possible. If
possible, we recommend shifting up to the next
gear at approx. 2,000 rpm.
Applies to: vehicles with automatic gearbox
Press the accelerator slowly and avoid using the

"kick-down"
feature.
Avoid driving at high speed
Avoid travelling at top speed. Fuel consumption,
exhaust emissions and noise Levels all increase
very rapidly at higher speeds. Driving at moder­
ate speeds will help to save
fuel.

Do not let the engine idle for longer than
necessary
Engine idling periods are automatically reduced
on vehicles with start/stop system*. On vehicles
without a start/stop system, it is worthwhile
switching off the engine at level crossings, for in­
stance, or at traffic lights with a long red phase.
The fuel saved after about 5 seconds can be
greater than the amount of fuel needed to re­
start a warm engine (the exact fuel saving de­
pends on the engine version).
The engine takes a very long time to warm up
when it is running at idling speed. Mechanical
wear and pollutant emissions are also especially
high during this initial warm-up phase. It is
therefore best to drive off immediately after
starting the engine. Avoid running the engine at
high speed.

o
Regular servicing
Regular servicing can establish a basis for good

iS
fuel economy before you start driving. A
well-

serviced engine gives you the benefit of im­
proved fuel efficiency as well as maximum relia­
bility and an enhanced resale value. A poorly
maintained engine can consume up to ten per­
cent more fuel than necessary.
Avoid short trips
The engine and emission control system need to
reach their proper working temperature in order
to minimise fuel consumption and emissions.
A cold engine uses disproportionately more
fuel.

The engine only reaches its working temperature
after about four kilometres, when fuel consump­
tion will return to a normal level.
Check tyre pressures
Always make sure the tyres are inflated to the
correct pressures
•=>page
306 to save
fuel.
If the
tyre pressures
are
just 0.5
bar
too Low, this can
increase the fuel consumption by as much as 5
%. Due to the greater rolling resistance, under-
inflation also increases tyre wear and impairs

handling.

Do not use winter tyres all through the year; they
will increase fuel consumption by up to 10 %.
Avoid carrying unnecessary loads
Every kilo of extra weight will increase the fuel
consumption, so it is worth checking the Luggage
compartment occasionally to make sure that no
unnecessary loads are being transported.
The roof carrier increases the air resistance of the
vehicle and should be removed when not in use.
This will save about 12 % of fuel at speeds of be­
tween 60 and 75
mph.

Save electrical energy
The engine drives the alternator to generate elec­
tricity. This means that fuel consumption rises
when more power is required for electrical equip­
ment. Switch off electrical equipment when it is
not needed. Electrical equipment which uses a
lot of electricity includes the blower (at a high
setting), the rear window heating and the seat

heating*.

73