2016 AUDI A3 check engine

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,&_ WARNING
-Read and follow t he warn ings in
¢ page 236, Working in the engine com­
partment
before open ing the hood and
check ing t he coolant level.
- The expansion tank @ may only be opened
and filled by an a uthorized Aud i dea ler or
authorized Aud i Service Fac ility.
- Coo la nt can enter the inside of the battery
when f illing the expansion tank @ and
cause a short c ircuit, which inc reases the
risk of fi re .
Refueling
Opening the fuel filler flap
Appl ies to vehicles: with plug- in hybrid drive
Fig. 9 8 Driver 's doo r: button il
The ta nk sys tem must be ve nted be for e refueling
.. Pull on the
Iii switch.
.. The fue l filler door automatically opens w ith in
a few seconds afte r vent ing .
Read and fo llow the directions for inserting the
f u el pump noz zle
¢ page 109.
Read and fo llow the inst ruct io ns for refueling
¢ page 230.
e-tron
Inserting the fuel pump nozzle
Applies to vehicles: with plug- in hybrid
Fig . 99 Fue ling proce du re : in ser t the fuel pump nozzle co r­
r ect ly
M ake s ure w hen inse rting the f uel pu mp noz zle
t h at you do no t press o n the fuel filler door open ­
er (!) with the fue l pum p nozzle . See the labe l in
the f ue l fi ller door @. Otherwise, a va lve wi ll lock
in the fue l filler neck and stop the fueling , even if
t h e tank is not full. You must vent the tank sys­
tem again if yo u press on the fuel fille r doo r
opener. The f uel p ump nozzle can stay in the fue l
filler neck when doing this.
Vent the tank system by pulling the
Iii switch in
the d river's door
¢ page 109.
Driver messages
Applies to vehicles: with plug-in hybrid drive
ti Tank flap open . Please press button again
for fueling
Fueling is possib le for a certain amou nt of time
after press ing the
Iii button . Yo u m ust press the
Iii button again if th is time is exceeded .
ti Tank flap malfunction! Unlock tank flap
manually . See owner's manual
T he re is a ma lfunction. Yo u must man ually un­
lock the fue l fi ller door
¢ page 110.
ti Warning! Limited power
The fue l ta nk is almos t emp ty . You must ant ici­
p at e a sign ifi can t power loss. Drive i mmed iate ly
t o a ga s st at ion .
POWER LIMIT Warning! Limited power
109

e-tron
The gasoline engine is no longer available be­
cause there is not enough fuel. Drive immediately
to a gas station.
Fuel filler door emergency release
A pp lies to ve hicles: w ith plug- in hy brid drive
You must use the emergency release to open the
fuel filler door when there is a malfunction
c::> page232 .
The tank is not vented. You can only fill a small
amount of fuel in the tank.
~ Fill only until the automatic fuel pump nozzle
turns off for the first time when it is operated
correctly.
Drive to an authorized Audi dealer or authorized
Audi Service Facility immediately to have the
malfunction corrected.
(D Tips
Pressure can escape if you open the tank cap
after using the emergency release. This can
create noises.
Charging
General information
A pp lies to veh icles: w ith plug -in hybrid drive
Two options are available for charging the vehi­
cle:
- Charge at a public charging station with a spe­
cial charging cable*
c::>page 112.
- Charge with household and industrial power
sockets using the Audi e-tron charging system
c::> page 112.
Environmental conditions when using the
charging system
-Operating temperature : -13 °F (-25 °C) to 95 °F
(+35 °C)
- Humidity:
5% to 95%, non-condensing
- 13,000 feet (4,000 meters) maximum above
sea level
110
Warnings when using the charging system
£
Surfaces can become very hot when
in direct sunlight.
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Incorrect use increases the risk of
electric shock.
~"-
Do not use any extensions cords or
cable reels.
~
Do not use any travel adapters.
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Do not use any power strips.
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Do not use any charging cables with
damage to the electronics or the
connecting wires.
.&_ WARNING
-
Sockets that are installed incorrectly can
cause electric shock or fire when charging the
high-voltage battery using the vehicle charg ­
ing connection.
- Installation and setup of the household con­
nection for the Audi e-tron charging system
may only be performed by a qualified elec­
trician. The qualified electrician is thereby
fully responsible for adhering to applicable
standards and regulations.
- Make sure that the selected charging con­ nection is suitable for drawing 16 amps .
- Make sure that the
110 volt socket is
grounded and shielded from water.
- Always check the fuse for the GFI outlet be­
fore connecting the charge cable.
- Never use a damaged GFI outlet.
- Read and follow the safety precautions in
the Audi charging dock* assembly instruc­
tions.
.&_ WARNING
If you are not familiar with the socket or the
e lectrical installation or it has not been
checked by qualified experts, never use it for
charging. Even very low charging currents can
cause ser ious damage and in particular fires if
the socket or electrical installation is in bad
condition. If necessary, get expert assistance
~

,....,
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0 > co ,...., Trailer mode Driving with a trailer
General information
Your Audi was designed primarily for passenger
transportation .
If you plan to tow a trailer, please remember that
the additional load will affect durability, econo­
my and performance.
T railer towing not only places more stress on the
vehicle, it also calls for more concentration from
the driver.
For this reason, always follow the operating and
driving instructions provided and use common
sense.
Technical requirements
Trailer hitch
Use a weight-carrying hitch conforming to the
gross trailer weight. The hitch must be suitable
for your vehicle and trailer and must be mounted
securely on the vehicle's chassis at a technically
sound
location . Use only a trailer hitch with a re­
movable ball mount . Always check with the trail­
er hitch manufacturer to make sure that you are
using the correct hitch.
Do not use a bumper hitch.
The hitch must be installed in such a way that it
does not interfere with the impact -absorbing
bumper system . No modifications should be
made to the vehicle exhaust and brake systems .
From time to time, check that all hitch mounting
bo lts remain securely fastened.
When you are not towing a trailer,
remove the
tra iler hitch ball mount . This prevents the hitch
from causing damage should your vehicle be
struck from beh ind
~ ,&. .
Trailer brakes
If your trailer is equipped with a braking system,
check to be sure that it conforms to all regula­
tions .
Trailer mode
The trailer hydraulic brake system must not be
directly connected to the vehicle's hydraulic
brake system.
Safety chains
Always use safety chains between your vehicle
and the trailer.
Trailer lights
T ra iler lights must meet all regulations . Be sure
to check with your Aud i dea ler for correct wiring,
switches and relays .
Mirrors
If you are unable to see the traffic behind you us­
ing the regular outside mirrors, then you
must in­
stall extended mirrors . It is important that you
always have clear vision to the rear.
,8. WARNING
After removing the trailer hitch, do not store
it in your vehicle. In case of sudden braking,
the hitch could fly forward and injure you or
your passengers.
Operating instructions
Maximum trailer weight
A trailer for your vehicle is limited to a typical
class 1 or class 2 trailer.
Trailer load distribution Be sure the load in the trailer is held securely in
place to prevent it from shifting forward, back­
ward or sideways.
Never allow a passenger to ride in a trailer~.&.
in Driving instructions on page 128.
Engine cooling system
Towing a trailer makes the engine work harder. It
is important that the cooling system's perform ­
ance is up to the additional load. Make sure that
the cooling system has enough fluid.
Tire pressure
When towing a trailer, inflate the tires of your
vehicle to the cold tire pressure listed under "Full ..,.
127

Trailer mod e
load" on the la bel located on the driver's side B ­
pillar (visib le when the door is open) . Inflate
tra iler tires to trailer and tire manufacturers'
specif ications.
Lights
Check to make sure both vehicle and t railer lights
are working p roper ly.
Safety chains
Be sure t railer safety chains are properly connect­
ed from the trai le r to the hi tch on the veh icle.
L eave enough sla ck in the cha ins to permi t turn­
ing corners. When yo u install safety chains, ma ke
sure they wi ll not drag on the road when yo u are
driving .
The cha ins s hou ld cross under the trailer tongue
t o prevent it from dropping in case of separation
from the h itch .
Driving instructions
Driving with a trailer always requires extra care
and consideration .
To obtain t he best poss ible handling of vehicle
and traile r, please note the fo llow ing :
.,. Do not tow a loaded trailer when your car itself
is not loaded.
.. Be especi ally ca ref ul when pass ing othe r
vehicles.
.. Observe speed limi ts .
.. Do not d rive at the maximum permissible
speed.
.. Always apply brakes early.
.. Monitor the temperature gauge .
Weight distribution
Towing a loaded t railer w ith an empty car res ults
in a high ly unstable distribution of weight . If this
cannot be avoided, drive at very low speeds on ly
to avoid the risk of losing steering control.
A "balanced" rig is easie r to operate and cont rol.
This means that the tow vehi cle should be loaded
to the extent possible and permissible, while
keep ing the tra iler as light as possib le under the
circumstances. Whenever possible, transfer
some cargo to the l uggage compartment of the
128
tow veh icle wh ile observing tong ue load require ­
ments and vehicle loading considerations.
Speed
The higher the speed, the mo re diff icu lt i t be­
comes for the driver to con trol the r ig. Do not
drive at t he maxim um permissible speed. Reduce
you r speed even more if load, weather or wind
con dit ions are unfavorab le - partic ularly when
go ing downh ill.
Reduce vehicle speed
immediately if the trailer
shows the slightest sign of swaying.
Do not try
to stop the swaying by accelerating.
Observe speed limi ts. In some areas, s peeds fo r
vehicles towing trailers are lower than for regular
vehicles .
A lways apply bra kes early. Whe n driving down­
hill, shift in to a lower gea r to use the engine
b raki ng effect to slow the vehi cle. Use of the
brakes alone ca n cause them to over heat and fai l.
Coolant temperature
The coolant temperature gauge 9 page 12 must
be obse rved caref ully. The coolant temperature
c a n incre ase if yo u drive o n long incl ines in a low
gear a t high engine speeds . Red uce your speed
immediately if the LE Ds in the top part of the dis­
play turn on .
Fo r more info rm ation abou t indicator lights, re­
fer to . ¢
page 20 .
A WARNING
-
Anyone not prope rly restrai ned in a moving
vehicle is at a much greate r risk in an acci ­
dent. Never let anyone ride in your car who is
not properly wear ing the restraints provided
by Aud i.
Trailer mode notes
Important to know
Your vehicle handles differen tly when towing a
trailer because o f the additiona l weight and di f­
ferent weight distribution. Safety, performance
and economy will g reatly depend on how caref ul-
l y you load your trai ler and operate you r rig. ..,_

Ass is t
Driver messages
Applies to vehicles: with Audi side assist
If the side assist switches off automatically, a
message appears i n the ins trument cluster dis­
p lay .
@j Audi side assist : cur rentl y unav ailable No
s en so r vi sion
The radar senso rs ' vision is affected. Do not cover
the area in front of the sensors with b ike wheels,
stickers, dirt or other objects. Clean the area in
front of the sensors, if necessary~
page 146,
fig. 133.
@j Audi side a ssi st : cur rentl y una vailable
Side assist cannot be switched on tempo rar ily be­
cause there is a malfunction (for example, the
battery charge level may be too low).
@j Audi side a ssist: System fault!
The system cannot guarantee that it wi ll detect
ve hicles co rrectly and it is switched off. The sen­
sors have been d isp laced or are faulty. Have the
system checked by an authorized Audi dea ler or
authorized Audi Service Facility soon.
Audi drive select (drive settings)
Introduction
Applies to vehicles: with Audi drive select
Audi drive select makes it possible to experience
different types of vehicle settings in one vehicle .
The driver can select from three
C omfort , Auto
and Dynamic modes using the r.1:a button in the
center console or the MMI to switch between a
sporty and a comfortable dr iving mode, for ex­
ample . In the
In div idual * mode, the vehicle set ­
tings can be adjusted to your personal preferen­
ces. This makes it possible to combine settings
such as a sporty eng ine set ting with smooth
s teer ing .
A WARNING
Using Audi drive select incorrectly can lead to
collisions, othe r accidents and serious inju­
ries .
148
· Description
Applies to vehicles: with Audi drive select
The vehicle setup in each mode depends on the
vehicle's features. However, the eng ine and
steering are a lways affected.
Engine and automatic tr ansmiss ion
Depend ing on the mode, the engine and auto­
matic transmission* respond more qu ickly or in a
more ba lanced manner to acce lerato r pedal
movements.
Adaptive damper s (Audi magnetic ride )*
The adaptive dampers use sensors to record in­
formation regarding steering movements, brak­
i ng and acce le ration operations by the dr iver,
r oad su rface, driving speed, and load. W it h Aud i
drive select you can adjust the adaptive dampers
spo rty (dynamic), comfortable (comfort) or ba l­
anced (auto).
Steering
The steering adapts in terms of steering ass is­
tance. There are d ifferent modes
c;;:> page 149.
Ind irect steering that moves easi ly as in comfort
mode is especia lly suited to long drives on a high ­
way. The dynamic mode provides sporty, direct
steering .
For vehicles with progress ive steering* the steer­
ing performance is more agi le .
Corn ering light *
The cornering light adjusts when driv ing on
cu rves at speeds between 6 mph (10 km/h) and
68 mp h (110 km/h). The pivoting act ion and the
li gh ting are also adapted to the mode.
Adaptive cruise control*
The behavio r whe n accelerating can be adjusted
from comfortable to sporty, depending on the
Audi drive select mode. Adaptive cr uise control
also responds to the dr iving beh avior of the vehi­
cle ahead in a more conservative or sporty man-
ner .
1111>

Intelligent Technology
A WARNING
-New brake pads do not achieve their full
braking effect during the first 250 mi
-
(400 km). They must be "broken in" first .
However, you can compensate for the
slightly reduced braking force by pressing
firmly on the brake pedal. Avoid heavy brak­
ing during the break-in period.
- Only apply the brakes for the purpose of
cleaning the brake system when road and
traffic conditions permit. You must not en­
danger other road users. This increases the
risk of an accident.
- On steep slopes, reduce the speed and se­
lect a lower gear or lower selector lever po­
sition. Drive as little as possible while press­
ing the brake pedal and avoid putting your
left foot on the brake pedal while driving.
This could cause the brakes to overheat and
impair the efficiency of the brakes.
- Do not let the brakes "grind" by always
keeping your foot on the brake pedal. This
can cause the brakes to overheat, increase
wear and increase braking distance unneces­
sarily.
- Certain weather and operating conditions
such as driving through water, driving in heavy rain or driving after washing your ve ­
hicle can impair the effectiveness of the
brakes . In the winter, ice may build up on
the brake pads, rotors and drums. Check
these components by braking carefully. Ap­
plying the brakes carefully several times
dries the brakes and removes ice build-up .
- The efficiency of the brakes can also be im­
paired by driving for long stretches on roads
covered with salt without using the brakes.
You can remove salt deposits from the brake rotors and pads by carefully applying
the brakes several times.
- If the front spoiler is damaged or you install
another spoiler, make sure the front wheel brakes are ventilated properly . Otherwise,
the brake system could overheat, which re­
duces their effectiveness .
- Failure of a brake circuit impairs braking
performance, which increases braking dis -
162
tance. Avoid driving the vehicle and have it
towed it to the nearest authorized Audi
dealer or authorized Audi Service Facility.
- Never let the vehicle roll while the engine is
stopped because this increases the risk of an
accident .
- If the brake booster is not working, you will
have to press much harder on the brake
pedal to compensate for the lack of the
booster.
(D Note
- Never let the brakes "rub" by pressing the
pedal lightly when braking is not really nec­
essary. This causes the brakes to overheat
and increases braking distance and causes
wear .
- Before driving on a long stretch with steep
slopes, reduce your speed and shift to the
next lower gear This makes use of the en­
gine braking effect and relieves the brakes.
If you need to brake additionally, brake in
intervals and not continuously.
(D Tips
- If the brake booster is not working, you
must press the brake pedal with much more
force than normal.
- If you retrofit your vehicle with a front spoil­
er, wheel covers or similar items, make su re
that the air flow to the front wheels is not
interrupted. Otherwise the brake system
can become too hot.
Electromechanical
steering
The electromechanical steering supports the
driver's steering movements.
Power steering adapts electronically based on
the vehicle speed .
The vehicle still has full steering functionality if
the power steering fails or when the engine is
stopped (towing) . To steer, you must apply much
more force than usual. .,.

Check ing and F illing
Checking and Filling
Gasoline fuel
Gasoline grade
A pp lies to veh icles: w ith gaso li ne engine
The correct gasoline grade is stated on the inside
of the fuel filler door .
The vehicle is equipped with a catalytic converter
and must only be driven w ith
unleaded ga soli ne.
Aud i recommends using TOP TIER Detergent Gas­
oline. Additional information on TOP TIER Deter­
gent Gaso line can be found on the offic ial web­
site (www .toptiergas.com) .
The individua l gasoline grades are differentiated
by
octane ratings . This value is given with (R +M)/
2 equating to AK I or in RON.
The fo llow ing headings match the co rrespon ding
sticker in the fue l fi ller door .
UNLEADED FUEL ONLY MIN . (R+M) /2 87
Regular/ MIN. RON
91 Regular
Use regu lar gaso line with minim um 87 AKI/
9 1 RON ~@ .
The max imum engine power is only reached if
p rem ium gasol ine 91 A KI/ 95 R ON is used.
UNLEADED FUEL ONLY PREMIUM MIN. (R
+M) /2
91 / SUPER MIN. RON 95
Using premium gasoli ne with m inim um 91 AKI/
9 5 RON is recommended.
If premium gasoline is not available, yo u can also
use reg ula r gasoline 87 AKI/ 91 RON . However
this does reduce t he engine powe r slight ly.
CD Note
- Fil li ng the tank just one ti me with leaded
f u el or other meta llic additives will caus e
p ermanent dete riorat io n to the cata lyt ic
conve rter func tion.
- When gasoline with an octane rati ng that is
too low is used , h igh speeds o r heavy engi ne
l o ad can lead to engi ne d am age.
228
(D Tips
The vehicle can be fi lled wit h fue l that has a
h igher octane rating than what is requi red by
the eng ine.
Blended gasoline
App lies to vehicles : wit h gasol ine engi ne
U se of g asoline conta ining alcohol or MTBE
(methyl tertiary butyl ether)
You may use unleaded gasoline blended with al ­
cohol o r MTBE (commonly referred to as oxygen­
ates) if the blended m ixt ure meets the fo llow ing
c rit er ia:
Blend of gasoline methanol (wood alcohol or
methyl alcohol)
- Anti-knock index must be 87 AKI or h igher.
- Blend must contain no more than 3% metha-
nol.
- Blend must contain more than 2% co-solvents.
Blend of ga soline and ethanol (grain alcoh ol or
ethyl alcohol)
- Anti-knoc k index must be 87 A KI or h igher.
- Blend must not conta in more t han 15% etha-
nol.
Blend of gasoline and MTBE
- Anti -knock index must be 87 AKI or higher.
- Blend mus t contain no t more t han 15% M TBE.
Seasonally adjusted gasoline
Many gasoline grades are blended to perform es­
pecially well for winter or s ummer dr iv ing . Du r­
i ng seasonal change-ove r, we s ugges t that you
fill up a t busy gas stat io ns where the seaso nal
adjustment is mo re l ikely to be made in t ime .
CD Note
-Methanol fuels which do not meet these re­
quireme nts may cause cor rosion and dam­
age to plas tic and rubber componen ts i n t he
fue l system.
- Do not use f ue ls that fa il to meet t he speci­
fie d cr iteria in th is ch ap ter.
...

Checking and Filling
@ Tips
Fue l can age and may lead to prob lems when
starting. Audi recommends replacing the fuel
in your vehicle within six months.
@ Tips
- If the engi ne is running while fueling, va­
pors can escape or the fuel can spill over.
Because of th is, the fuel no zzle switches off
before the tank is full.
- Do not fuel the vehicle when the ignition is
switched on. Otherwise, the fuel gauge may
not show t he correct level after fueling the
vehicle .
- Diesel veh icles are equ ipped with a diesel
misfueling guard
1>. It allows the vehicle to
be f ueled on ly w ith a diesel fuel pump noz­
zle .
- A wo rn o r damaged nozzle or a nozzle that
i s too smal l may not be ab le to open the
diesel misfueling protector . If this is the
case, try t urning the nozzle before inserting
i t in the f uel fille r neck, u se a d ifferent fue l
pump or see an aut horized Audi dea ler or
a uthorized Audi Service Facility fo r assis­
tance .
- The misf ueling guard does not open when
adding fue l from a fue l conta iner . You can
bypass it by adding the diesel fuel slow ly.
- The fuel filler door on your ve hicle does not
l ock when you lock the vehicle from the in­
side.
l ) Ma rket -specifi c
232
Fuel filler door emergency release
If the cen tral locking system is faulty, the fuel
filler door can be unlocked manually .
Fig. 188 Right re ar l ug gag e compa rtm en t: em erg enc y re ­
lease (example)
T he emergency release mechan ism is located be­
hind the right s ide trim panel in the luggage
compartment.
.,. Remove the cover in the side panel.
.,. Loosen the loop from the retainer and then pull
on the loop carefully-arrow-
~ CD. The fuel fill­
er door is released .
.,. To open the f uel filler door, press on the left
side
~ page 230, fig. 186 .
Plug-in hybrid drive*: read and follow the instruc­
tions unde r
Qpage 109.
(D Note
Only pu ll on the loop until you feel res ista nce .
You wil l not hear it re lease. Otherw ise you
could damage the emergency release mecha­
n ism .
Catalytic converter
Applies to vehicles: with gasol ine engine
It is very important tha t your emi ssion control
sys tem (ca talytic conv erter) is functioning prop­
erly to ensure that your vehicle is running in an
env ironmentally sound manner .
.,. Always use lead-free gasoline ~ page 228, Gas­
oline grade .
.,. Never run the tank down all the way to empty . ..,.