2018 AUDI A3 SEDAN check engine

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"To open the side panel, turn the lock and re ­
move the cover
"Lift the cargo floor using the plastic handle @
unt il the cargo floor engages beh ind the tabs
@ in both s ide panels¢ fig. 281 (upper im­
age) .
" Fold the cargo floor back befo re closing the
luggage compartment lid .
Veh icle tool kit and cargo floor co ve r
App lies to: ve hicles with vers ion 2
The vehicle tool kit, tire mobility kit* and com­
pressor* are stored in the luggage compartment
u nder the cargo floor
cover @¢ fig. 280.
"Engage the plastic hook ® in the luggage com-
partment
seal ¢ fig. 281.
" Fold the cargo floor back before closing the
luggage compartment lid .
..&, WARNING
Applies to: vehicles w ith jack
Improper use of the vehicle jac k can ca use se ­
rious personal injuries.
- Never use the screw drive r hex head to
t ighten whee l bolts, since the bolts cannot
attain the necessary tightening torque if you
use the hex head, potentially causing an ac­
cident.
-The factory -supplied jack is intended only
for your vehicle model. Under no circum­
stances should it be used to lift heavy
vehicles or other loads; you r isk injuring
yourself.
-Never start the engine when the vehicle is
ra ised, which could cause a n accident.
-Support the veh icle secure ly with appropri­
ate stands if work is to be performed under­
neath the vehicle; otherwise, there is a po­
tent ial risk for injury .
-Never use the jack supplied with your Audi
on another vehicle, particularly on a heav ier
one . The jack is only suitable for use on the
vehicl e it came w ith.
@ Tips
The vehicle jack* in your vehicle is mainte­
nance-free.
Em ergen cy as sis tanc e
Tire mobility kit
Preparation
Applies to: veh icles w it h tire mob ility kit
" Read and follow the important safety precau-
tions i n
¢page 360.
"Se t the park ing brake.
" Move the selector lever into the P position .
"Check if a repair with the tire mobi lity kit is pos -
sible
¢ page 361.
Using the tire mobility kit
Applies to: veh icles w it h tire mob ility kit
Fig. 282 Tire : tire damage t hat cannot be repaired
The tire repair is only meant for temporary use .
Change the spare tire as soon as
possible¢ &.
If the t ire is p ie rced by an object su ch as a nail,
do not remove the objec t from t he tire.
The tire repair set is able to be used at tempera­
tures as low as -4 °F ( -20 °C) .
The tire mobility kit may not be us ed :
-if the t ire has cuts or punctures that are larger
than 0.16 in (4 mm)
(D ¢ fig. 282
-if the rim is damaged @
-if you drove with very low tire pressure or with-
out air in the tire @
In this case, see an authorized Aud i dea ler o r au­
thorized Audi Serv ice Facility for ass istance.
.&_ WARNING
-Please note that the tire mobility kit cannot
be used in all situations, and that it may on­
ly be used temporarily .
-The tire sealant must not come in contact
with skin, eyes, or clothes.
361

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Fuses and bulbs
Fuses
Changing fuses
A fuse that has blown will have metal strips that
have burned through .
Fig. 2 96 Steering column area: cover
Fig. 297 Left s ide of the eng ine compartment: fu se cover
T h e fuses a re loca ted behind a cover in t he stee r­
ing column area ¢
fig. 296 or under a cover on
the left side of the engine compartment
¢ fig. 297.
.. Switch the ignition and all e lectr ica l equipment
off.
.. Check the following table to see which fuse be ­
longs to the equipment
¢ page 372 .
.. Remove the cover .
.. Remove the plastic cl ip from the fuse panel
cove r in the engine
compartment¢ fig. 297 .
.. Remove the fuse using the plastic clamp .
.. Replace the burned fuse w ith an identical new
one .
.. Reinsert the cove r.
Fuses and bulbs
Fuse color identification Color Current rating
in amps
Black 1
P urple 3
Light brown 5
Brown 7.5
Red 10
Blue 15
Yellow 20
W hite or tra nspa rent 25
Green 30
O range 4 0
_& WARNING
-
Do not repair fuses and neve r rep lace a blown
f u se with one that has a higher amp rating.
This can cause damage to the e lectr ica l sys­
tem and a fi re .
@) Note
If a new fuse burns out again shortly afte r you
have insta lled it, have the electrical system
chec ked as soon as poss ible by an authorized
Audi dealer or authorized Audi Service Fac ili­
ty.
(D Tips
- The following table does not list fuse loca­
tions that are not used.
- Some of the equipment listed in the fo llow­
ing tables applies on ly to certain model ver­
sions or certa in optional equipment.
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Emergency situations
General
This chapter is intended for trained emergency
crews and working personnel who have the nec­
essary tools and equipment to perform these
operations.
Starting by pushing or
towing
~ Note
Vehicles with an automatic transmission can­
not be started by pushing or towing.
Jump starting
Preparation
If needed, the engine can be jump started by an­
other vehicle battery.
Applies to: vehicles with plug-in hybrid drive: the
connection points for the jump start cable are
different
q page 102.
If the engine does not start because the vehicle
battery is drained, you can jump start the engine
using another vehicle battery. You need a jump
start cable 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.
Emergency situations
A WARNING
--
- Applies to: vehicles with 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 ve­
hicle
Q page 102.
-A drained vehicle battery can freeze at tem­
peratures around 0
Q(. If the vehicle battery
is frozen, you must thaw it before connect­
ing the jump start cables. If you do not, this
increases the risk of an explosion and chem­
ical burns. After jump starting the vehicle,
drive to an authorized Audi dealer or author­
ized Audi Service Facility immediately to
have the vehicle battery checked.
- The engine compartment is a dangerous
area and can cause serious injuries. Before
working in the engine compartment, read
and follow the warnings
Qpage 318.
- Handling the jump start cables incorrectly
may cause the vehicle battery to explode
and lead to serious injuries . To reduce the
risk of injury, observe the following:
- Do not touch the non-insulated parts of the
terminal clamps. The cable must also not
come into contact with vehicle components
that conduct electricity when it is connected
to the positive terminal. This can cause a
short circuit.
- Route the jump start cables so they cannot
get caught in the moving parts in the engine
compartment.
- To reduce the risk of chemical burns, do not
bend over the vehicle battery.
- The locking bolts on the battery cells must
be tightened securely.
- Keep ignition sources (open flames, burning
cigarettes, etc.) away from the vehicle bat­
teries to reduce the risk of an explosion.
- Do not clamp the negative cable to fuel sys­ tem components or to the brake lines.
(LlJ} Note
- There must be no contact between the
vehicles, If there is, current could already be
.,.
375

Emergency situations
flowing when connecting the positive termi­
nals and the vehicle battery in the vehicle
providing the jump start cou ld be drained.
- Jump start cables can cause considerab le
damage to the vehicle electrical system if
they are connected incorrectly.
- The drained vehicle battery must be con­
nected correctly to the electrical system.
- P lease note that the connecting process de­
scribed below for the jump start cables is in­
tended for when your vehicle is being jump
started. If you are jump starting another ve­
hicle, do not connect the negative cable to
the negat ive terminal( -) on the drained ve­
hicle battery, but rather connect it to a large
metal component that is bolted securely to
the engine block, or to the engine block it­
se lf. If the vehicle battery in the vehicle be­
ing jump started is not vented to the out ­
side, there is a risk of explosion due to hy­
drogen gas.
@ Tips
If a car phone is installed, switch it off or
check the operating guide for what to do in
this situation.
A3 models: starting the engine
Both jump start cables must be connected in the
correct order!
F ig. 300 Ju mp starting using a vehicle batte ry in anot her
vehicle :@ - dra ined, @- providing cu rrent
Plug-in hybrid drive *: the connection points for
the jump start cables vary Q
page 102.
The vehicle battery is located on the left front
side of the engine compartment . Open the cover
to access the positive terminal of the vehicle bat-
376
tery. The procedure for connecting jump start ca­
bles that is described next is designed to help
j ump start your vehicle .
Follow the information about the vehicle battery
Qpage 326 .
Preparations
1. Read the following carefully ¢ page 375,
Preparation.
2. Set the parking brake and select neutral on
vehicles with a manual transmission, or move
the selector lever to the P position on
vehicles with an automatic transmission .
3. Turn the ignition and electrical equipment
off in both vehicles.
Connecting/disconnecting the jump start
cable
4. Fold the battery cover upward.
5. Clamp the end of the red jump start cable to
the termina l
(D ¢ fig. 300 on the drained ve­
hicle
battery @Q(D in Preparation on
page
375 .
6. Clamp the other end of the red jump start ca­
ble to the positive terminal @on the vehicle
battery providing the current @.
7. Clamp the black end of the jump start cab le
preferably at the ground point, or on the
negative terminal of the vehicle battery@
on the vehicle providing the current @.
8. Clamp the other end of the black jump start
cable
only to the ground point © on your
vehicle @Q(D .
9. Route the jump start cables so they cannot
get caught in the moving parts in the engine
compartment.
Starting the engine
10. First start the engine in the vehicle giving the
charge and let it run at idle.
11. Now start the engine in the vehicle with the
dra ined vehicle battery and wait two to three
minutes until it "r uns smoothly".
12. If the engi ne does not start, stop the starting
procedure after 10 seconds and then repeat
it after approximately 30 seconds .
13. In the vehicle that is being jump started, switch the heater fan and rear window
..,,

Emergency situations
~ Adjust liftin g arms o f workshop hoist o r floor
j ac k to matc h veh icle li fting points .
~ Insert a ru bber pa d between t he floor jack/
w ork shop h oist a nd the lifting p oints.
If
you must lift your vehicle with a floor jack to
work underneath, be sure the vehicle is safely
supported on stands intended for this purpose.
Front lifting point
Th e liftin g poin t is locat ed o n the floo r pa n re in­
for cement abou t at the same leve l as t he jac k
mo unt ing
p oint ~ fig . 306. Do not lift the vehi­
cle at the vertical sill reinforcement.
Rear lifting point
Th e liftin g point is lo cat ed on t he vert ic al rein­
f or cemen t of the lower si ll fo r th e on-bo ard j ack
q fig . 307.
Lifting with vehicle jack
Refer to Q page 366 .
.&_ WARNING
- To r educ e th e ris k of serious injur y an d ve hi­
cl e d ama ge.
- A lways lift t he ve hicle only at the s pecial
wo rksho p hoist and floo r jac k lift po ints il­
lust rated
q fig. 3 06 and q fig. 307.
- Fa ilure to lift the vehicle at these po ints
co uld cause the vehicle t o tilt or fa ll from
a li ft if th ere is a c hang e in vehicle w eight
d istr ibuti on and b alance . This might hap ­
p en , for exam ple, when h eavy co mpo­
n e nts such a s th e engi ne b lock or tr ans­
mission ar e re mo ved.
- W hen re moving h eavy co m pon ents lik e
th ese, anchor vehicl e to hoist or add cor re­
s ponding weigh ts to ma inta in t he ce nt er of
gr avity . Oth erwise, the ve hicl e m igh t ti lt or
s lip off the hoist , causing ser ious perso na l
injury .
(LlJ) Note
- Be awa re o f th e fo llowi ng points b efore li ft­
i n g th e ve hicle:
-The vehicle should never be lifted or
jacked up from underneath the engine oil
380
pan, the transmission housing, the front
or rear axle or the body side members.
This could lead to serious damage.
- To avoid damage to the underbody or
chassis frame, a rubber pad must be in­
serted between the floor jack and the lift
points.
- Before driving over a workshop hoist ,
check that the vehicle weight does not
exceed the permissible lifting capacity of
the hoist.
- Before driving over a workshop hoist, en­
sure that there is sufficient clearance be­
tween the hoist and low parts of the ve­
hicle.

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Technical data
Vehicle specifications
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X X XXXXXXX X X X X XX
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®i ~= -:~~ XXXX XXX XXX
©+ ~ rur:i~ xxxx I xxxx XXX I xx
II. · AIJSli t I OPTIONS
E0A 7D 5 4U B 6XM SSG SR W
2 EH J0 Z 1LB 1AS 1BA
3FC SM U 7Xl
F 0 A 9G3 0G7 0 YH 0JF
TL 6 3 KA 8EH UlA X 9B 0Z7
l XW
803
908 8Z4 020
7 T6 CV 7
71<0 4X3 21< 2
3L4 4 KC 3Y0 413 5 02
1S A 7GB
01A 4GQ
XX. X XX X X X X XXXX
F ig. 308 Vehicle ident ifica tion labe l
Vehicle Identification Number (VIN )
The VIN n umber is located in the following pla­
ces :
0
0
~ :x: -Se lect : the I MENU ! button >Vehi cle > left con­
t rol button
> Servi ce & check s > Vehicle infor­
mati on.
-On t he vehicle identificat io n labe l
Dimensions
The dimens ions can vary depending on the mod­
e l, equipment and measuring methods used in
each marke t.
Technical data
-At the front behind the windshield *
Vehicle identification label
The vehicle identification label~ fig. 308 is loca t­
ed in the luggage compartment unde r the cargo
floor cover.
The vehicle identification label informat ion can
also be found in the Warranty and Maintenance
booklet .
The sticker contains the following vehicle data :
© Vehicle Identification Number (VIN)
@ Vehicle type, eng ine output, transmission
@ Engine and transmission codes
@ Paint and interior codes
® Optional equipment numbers
Notes about technical
data
T he values may vary based on special equipment
as well as market-specif ic equipment and meas­
u ring methods .
Please note that the specific ations listed in the
vehicle documen tat ion a lways take preceden ce.
{i) Tips
M issing tec hni cal data was not ava ilable at
t he time of pr int ing.
Length (in (mm )) Width (in (mm )) Width across the
Height at curb
mirrors (in (mm )) weight (in (mm))
A3 Cabriole t 17 4.4 (4,430) 70.S (
1,793) 77.1 (1,960) 5S.4 (1,409)
A3 sedan 17 5 .8 (4,465) 70. 7 (1,796) 77.1 (1,960) 5S.7 (1,416)
A3 Sportback e-tron 169.6 (4,311) 7
0.2 (1 , 78S) 77.4 (1 ,966) 56.1 ( 1,426)
RS3 sedan 176.3 (4,479) 70.9 (1,802) 77.1 (1,960) 5S.0 (1,397)
S3 sedan 176
.1 (4,4 72) 70 . 7 (1 ,796) 77.1 ( 1,960) 54 .8 (1,392)
381

Consum er Info rmation
today's automobi les, have steadi ly red uced the
scope of maintenance and repairs which can be
carried out by veh icle owners.
Al so , sa fet y and
en vironmental
concerns place very strict limits
on the nature of repairs and adjustments to en­
g ine and transmission parts w hich an owner can
perform .
Maintenance, adjustments and repairs usually re­
qu ire special tools, testing devices and other
equ ipment available to specially trained work ­
shop personnel in order to assure proper per­
forma nce, re liab ility and safety of the ve hicle and
its many systems .
Improper maintenance, adjustments and repairs
can impair the operation and reliab il ity of your
ve hicle and eve n void your vehicle warra nty .
Therefo re, proof of se rvicing in accordance w ith
the m aintenance schedule may be a condition fo r
up hold ing a possible wa rranty claim made wi thin
the warranty pe riod.
Above all, ope rational safety can be adversely af­
fected, c re ating unnecessa ry risks fo r you and
your passengers.
I f in doubt about any servicing, have it done by
your author ized Audi dealer or any other prope rly
eq uipped and qualified workshop . We strongly
urge yo u to g ive your author ized Audi dealer the
opportunity to perform a ll scheduled mainte ­
nance and necessary repairs. Your dealer has the
facilities, origina l parts and tra ined specialists to
keep your veh icle running properly.
Performing limit ed maint enanc e yourself
The fo llowing pages describe a limited number of
procedures whic h can be performed on your ve hi­
cle with ordinary tools, should the need arise and
tra ined personnel be unava ilable. Before per ­
forming any of these procedures, always thor­
ough ly read all of the app licab le text and carefu l­
ly follow the instructions g iven . Always rigorously
observe the
W ARNINGS prov ided .
Befo re yo u check an ything in the engine com ­
partment , alway s read and h eed all WARNINGS
c> .&. and c> page 318 .
384
A WARNING
-Ser ious personal injury may occur as a result
of improperly performed maintenance, ad­
justments or repairs .
- Always be extreme ly careful when work ing
on the vehicle . Always follow commonly ac­
cepted safety practices and general com­ mon sense. Never r is k personal in jury.
- Do not attempt any of the maintenance,
checks or repairs described on the following pages if you are not fu lly fam il iar with these
or other procedu res with respect to the ve­
hicle, or are uncertain how to proceed.
- Do not do any work wi thout the prope r tools
and eq uipmen t. H ave the necessary wo rk
done by your authorized Audi dealer or an ­
other properly equipped and qualified work­
shop.
- The engine compartment of any motor vehi ­
cle is a potentially hazardous area . Never
reach into the area around or touch the radi­
ator fan. It is temperature controlled and
can switch on suddenly - even when the en­
gine is off . The radiato r fan switches on au­
tomatically when the coolant reaches a cer­
tain tempe rature and w ill cont inue to run
until the coolant temperature d rops.
- Always sw itch off the ignition before anyone
gets under the vehicle.
- Always support your vehicle with safety
stands if it is necessary to work underneath
the vehicle. The jack supp lied with the veh i­
cle is no t adequate fo r th is pu rpose and
could collapse causing serious personal in­
jury .
- If you must wor k unde rneath the vehicle
w ith the wheels on the g round, always make
sure the vehicle is on level ground, that the
wheels a re always sec urely blocked and that
the engine cannot be started.
- Always make sure the transmission se lector
lever (automatic t ransm iss ion) is in P (Park
position) and the pa rk b rake is applied .
Ill>

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@ For the sake of the environment
-Changing the engine settings wi ll adversely
affect emission leve ls. Th is is detrimental to
the env ironment and increases fuel con ­
sumption.
- A lways observe environmenta l regu lations
when disposing of old engine o il, used brake
flu id, d irty engine coolant, spent batteries
or worn out tires.
- Undeployed airbag modules and pretension­
ers might be classified as Perchlorate Mate­
rial -spec ial handl ing may apply, see
www .dtsc.ca .gov/hazardouswaste/perch lo­
r ate. When the vehicle or pa rts of t he re­
stra int system includi ng a irbag mod ules
s af ety be lts with pretens ioners a re scrap ­
ped, a ll applicab le laws and regulations
must be observed. Your a uthorized Audi
dealer is fam iliar with these requirements
and we recommend that you have your dea l­
er perform this service for you.
Accessories and
technical changes
Additional accessories and parts
replacement
Always consult on authorized Audi dealer before
purchasing accessories.
Audi ve hicles that are constructed with advanced
materials like Steel/Aluminum (Hybrid construc­
tion), Aluminum (Aud i Space Frame), and/or Alu­
minum/Carbon Fiber (Ultra Advanced Light
We ight Materials) are as unique as the ir dr ivers .
Therefo re, the ava ilability of certain parts needed
for repa ir , restorat ion, or reconstruction w ill be
rest ricted , or pa rts will be unava ilable, if the ve ­
hicl e is not repa ired at an a uthorized Aud i co lli­
sion repair facility . This includes but is not limi t­
ed to structura l parts which require specia lized
training and equipment to restore their crash ­
worthiness back to the original NHTSA and IIHS performance.
Your vehicle incorporates the latest safety design
features ensuring a high standard of active and passive safety.
Con sum er In form ation
This safety could be compromised by non -ap ­
proved changes to the vehicle. For t his reason, if
parts have to be rep laced, p lease observe the fol ­
lowing points when install ing additional accesso­
ries:
Approved Audi accessories and genuine Audi parts are avai lab le from authorized Aud i dea lers.
T hese dea le rs a lso have t he necessa ry fa cilit ies,
tools and trained specialists to install the pa rts
and accessories proper ly .
A WARNING
--
Using the wrong spare parts or using non -ap­
proved accessories can cause damage to the
vehicle and serious personal injury.
- Use on ly accessories expressly approved by
Aud i and genuine Audi spare parts
- These parts and accessor ies have been spe­
cially designed to be used on your vehicle.
- Do not use license p late brac kets in the
front area that are d ifferent from the one
installed at the factory, or add additional
li­
cense plate brackets.
- Never install accessor ies such as telephone
cradles or beverage holders on airbag covers
or w ith in the airbag deployment zones. Do­
ing so will increase the risk of injury if a ir­
bags a re tr iggered in an accident!
- Before you check anyth ing in the eng ine
compa rtment, always read and heed all
WARN INGS
~page 318.
@ Note
- If items other than genu ine Audi spare
parts, add-on equipment and accessory
items are used or if repa ir work is not per­
form ed according to specified methods, th is
c an result in seve re damage to you r vehi­
cle's eng ine and body (s uch as cor rosion)
and adve rsely affec t your ve hicle's warranty.
- If emergency repa irs m ust be pe rformed
elsew here, have the vehicle ex am ined by an
authorized A udi dealer as soon as possib le .
- Th e manufac ture r ca nnot be he ld liable fo r
damage wh ic h occur s d ue to fail ure to com ­
ply with these stipulations.
385