2018 AUDI Q3 check engine light

Check ing and F illing
Cooling system
Coolant
The engine coo ling system is filled with a mixture
of pur ified wate r and coolan t addit ive at the fa c­
t ory . T his coo la nt must not be not changed .
The coolant leve l is monito red throug h the . in­
d icator light
¢ page 12. Howeve r, we do recom­
mend occasionally chec king the coo la nt level
manually.
If you must add coolant, use a m ixt ure of wa ter
a nd coo lant add it ive. Mixing the coolant additive
with d istilled water is recommended.
Coolant additive
The coolant additive is made of ant i-freezing and
corros ion protection agents. Only use the fo llow­
ing coolant add it ives. These addit ives may be
m ixed w it h each other.
Coolant additive Specification
G13
TL 774 J
G12++ TL 774 G
The amount of coo lant add itive that needs to be
mixed wit h water depends on the climate where
the vehicle will be operated . If the coolant addi ­
tive percentage is too low, the coolant can free ze
and damage the engine.
Coolant Freeze protec-
additive tion
Warm min . 40% m in. -13 °F
reg ions max . 45% (
- 25 °C)
Co ld min. 50% max. -40 °F
reg ions max. 55% (-40 °C)
CJ) Note
- Befo re the start of winter, have an author­
i zed Audi dealer or authorized A udi Service
Fac ility check if the coolant additive in yo ur
vehicle matc hes the percentage approp riate
for the climate . Th is is especially important
whe n driving in co lde r clima tes.
- If the approp riate coolant additive is not
available in an emergency, do no t add any
other addi tive . You cou ld damage the en-
162
gine . If this h appens, on ly use wa ter and re ­
store the correct m ixt ure ratio with t he
specified coo lant ad ditive as soon as poss i­
ble.
- Only refill w ith new coolant .
- Radiator sealant mus t not be mixed wi th
the coolant .
Adding coolant
Fig. 140 En gine co mpar tm ent: coo la nt expans io n ta nk
cove r
Observe the safety precautions¢ page 155,
Working in the engine compartment .
Checking the eng ine c oolant level
.,. Park the vehicle on a level surface .
.,. Sw itch the ignit ion off.
-"' -"' •
"" co a,
.,. Read the coolant level on the coolant expansion
tank ¢
page 158 , fig. 137. T he coolant leve l
must be betwee n the markings when the en­
gi ne i n cold . When t he e ng ine is warm it can be
slightly above the uppe r mar king .
Adding coolant
Requirement: there must be a residual amount of
coolant in the expansion ta nk
¢ (D .
.,. Let the engine coo l down.
.,. Place a clot h over the coolant expansion tan k
cap and unscrew the cap counterclockw ise
¢ .&._ .
.,. Add coo lant m ixed in the cor rect rat io
c;, page 162 up to t he up per ma rk ing .
.,. Make sure that the fluid level remains stab le.
Add mo re coolan t if necess ary.
.,. Close the cap sec urely .
Coo lant loss usually ind icates there is a lea k. Im-
med iate ly dr ive you r ve hicl e to a n author ized .,.

Emergency assistance
& WARNING
You or your passengers could be injured while changing a wheel if you do not follow these
safety precautions :
- If you have a flat ti re, move a safe d ista nee
off the road . Turn off the engine, turn the
emergency flashers on and use other warn·
ing devices to alert other motorists.
- Make sure that passengers wait in a safe
place away from the vehicle and well away
from the road and traffic.
- To help prevent the vehicle from moving
suddenly and possibly slipping off the jack,
always fully set the parking brake and block
the front and back of the wheel diagonally
opposite the wheel being changed with the
folding chocks or other objects. When one
front wheel is lifted off the ground, placing
the Automatic Transmission in "P" (Park)
will
not prevent the vehicle from moving.
- Before you change a wheel, be sure the
ground is level and firm. If necessary, use a
sturdy board under the jack .
- Always store the vehicle tool kit, the jack
and the replaced tire in the luggage com­
partment
c:> page 102 .
(D Tips
Obey all laws.
Changing a wheel
When you change a wheel, follow the sequence
described below step-by-step and in exactly that
order.
1. Remove the decorative wheel cover* or the
wheel bolt caps*. For more details see also
<=:>page 193.
2. Loosen the wheel bolts c:> page 193.
3. Locate the proper mounting point for the
jack and align the jack below that point
<=:>page 194.
4. Lift the car with the jack c:> page 194 .
5. Remove the wheel with the flat tire and then
install the
spare tire <=:>page 195.
6. Tighten all wheel bolts lightly.
7.
Lower the vehicle with the jack.
192
8. Use the wheel bolt wrench and firmly tighten
all wheel bolts in a crisscross pattern
<=:>page 193.
9. Replace the decorative wheel cover* or the
wheel bolt caps*.
& WARNING
Always read and follow all WARNINGS and in­
formation
c:> .&. in Raising the vehicle on
page 194
and <=:>page 196.
After changing a wheel
A wheel change is not complete without the do·
ing the following .
.,. Always store the vehicle tool kit, the jack* and
the replaced tire in the luggage compartment
c:>page 102.
.,. Check the tire pressure of the spare tire as soon
as possible .
.,. As soon as possible, have the
tightening tor·
ques
on all wheel bolts checked with a torque
wrench. The correct tightening torque is
10S ft lbs (140 Nm).
.,. Have the flat tire
replaced as soon as possible.
(D Tips
- If you notice that the wheel bolts are cor­
roded and difficult to turn while changing a
tire, they should be replaced before you check the tightening torque.
- Drive at reduced speed until you have the
tightening torques checked .

Fuses and bulbs
Electrical fuses
Changing fuses
A fuse that has blown will have metal strips that have burned through .
Fig. 158 Driver's side of the cockpit: fold ing the storage
co mpartme nt dow n
Fig. 159 Engine compartment: removing the fuse pane l
cover
The fuses are located in the driver's side footwell
behind the storage compartment and in the en­
gine compartment .
Preparations
.. Switch the ign ition and all electr ical equipment
off .
.. Check the following table to see which fuse be-
longs to the equipment .
Fuses behind the storage compartment
.. Open the storage compartment .
.. Press the left and right retainers inward and
fold the compartment all the way down
a ¢fig. 158 . co ...... N ~ Fuses in the engine compartment
'"' 0 g .. Open the hood ¢ page 155.
co
Fuses and bulbs
.. To release the fuse panel cover, slide both slid­
ing retainers at the left and right forward
¢ fig. 159 .
.. Remove the fuse panel cover .
Replacing fuses
The clamp is located below the fuses behind the
storage compartment (driver's side) .
.. Fold th is compartment all the way down and
remove the clamp from the holder .
.. Remove the colored plastic clip from the fuse
panel, if necessary . You can dispose of the plas­
tic clip .
.. Remove the fuse using the clamp .
.. Replace the blown fuse only with an identical
new one .
.. Install the cover.
Fuse color identification
Color Current rating
in amps
Black 1
Purple 3
Light brown 5
Brown 7.5
Red 10
Blue 15
Yellow 20
White or transparent 25
Green 30
Orange 40
A WARNING
Do not repair fuses and never replace a blown
fuse with one that has a higher amp rat ing .
This can cause damage to the electr ical sys­
tem and increases the risk of fire.
(D Note
If a new fuse burns out again shortly after you
have installed it, have the electrical system
checked as soon as poss ible by an authorized
Audi dealer or authorized Audi Service Facili­
ty.
199

0 co ......
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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
CD Note
Vehicles with an automatic transmission
cannot be started by pushing or towing.
Starting with jumper
cables
If necessary, the engine can be started by con­
necting it to the battery of another vehicle.
If the engine should fail to start because of a dis­
charged or weak battery, the battery can be con­
nected to the battery of
another vehicle, using a
pair of jumper cables to start the engine.
Jumper cables
Use only jumper cables of sufficiently large cross
section
to carry the starter current safely. Refer
to the manufacturer's specifications.
Use only jumper cables with
insulated terminal
clamps which are distinctly marked:
plus(+) cable in most cases colored red
minus(·) cable
in most cases colored black.
A WARNING
Batteries contain electricity, acid, and gas.
Any of these can cause very serious or fatal in­
jury. Follow the instructions below for safe
handling of your vehicle's battery.
-Always shield your eyes and avoid leaning
over the battery whenever possible.
-A dead battery can freeze at temperatures
around 32 °F (0 °C). If the vehicle battery is
frozen, you must thaw it before connecting
the jump start cables. If you do not, this in-
Emergency situations
creases the risk of an explosion and chemi­
cal 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.
- Do not allow battery acid to contact eyes or
skin . Flush any contacted area with water
immediately.
- Improper use of a booster battery to start a
vehicle may cause an explosion .
- Vehicle batteries generate explosive gases.
Keep sparks, flame and lighted cigarettes
away from batteries.
- Do not try to jump start any vehicle with a
low acid level in the battery .
- The voltage of the booster battery must also
have a 12-Volt rating. The capacity (Ah) of
the booster battery should not be lower
than that of the discharged battery. Use of
batteries of different voltage or substantial­
ly different "Ah" rating may cause an explo­
sion and personal injury.
- Never charge a frozen battery. Gas trapped
in the ice may cause an explosion.
- Never charge or use a battery that has been
frozen . The battery case may have be weak­
ened.
- Use of batteries of different voltage or sub­
stantially different capacity (Ah) rating may
cause an explosion and injury. The capacity (Ah) of the booster battery should not be
lower than that of the discharged battery.
- Before you check anything in the engine
compartment, always read and heed all
WARNINGS
qpage 155.
CD Note
-Applying a higher voltage booster battery
will cause expensive damage to sensitive electronic components, such as control
units, relays, radio, etc.
- There must be no electrical contact between
the vehicles as otherwise current could al­
ready start to flow as soon as the positive
(+) terminals are connected.
203

Index
Cleaning the tail lights . . . . . . . . . . . . . . . . . 186
Climate control system Drive se lect. . . . . . . . . . . . . . . . . . . . . . . . . . 8 1
Climate control system (automatic) . . . . . . . 51
AU TO (automatic mode) . . . . . . . . . . . . . . . 54
Changing the tempe rature unit . . . . . . . . . 55
Descr ipt io n . . . . . . . . . . . . . . . . . . . . . . . . . . 51
Key recogn ition . ............. .... .. .. 5 1
Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
Synchro nizing . . . . . . . . . . . . . . . . . . . . . . . . 54
Climate control system (manual) Descr ipt io n . . . . . . . . . . . . . . . . . . . . . . . . . . 5 1
Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 2
Closing Hood . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 157
Pano rama glass roof . . . . . . . . . . . . . . . . . . 31
W indows .. .... .................. ... 30
Closing/opening
refer to Unlocking/locking . . . . . . . . . . . . . 24
Cockpit (overview) . . . . . . . . . . . . . . . . . . . . . . 6
Com ing home . . . . . . . . . . . . . . . . . . . . . . . . . 34
Compact spare tire . . . . . . . . . . . . . . . . . . . . 197
Compartments . . . . . . . . . . . . . . . . . . . . . 45, 46
Compass in the mirror . . . . . . . . . . . . . . . . . . 40
Compliance . . . . . . . . . . . . . . . . . . . . . . . . . . 215
Consumer Info rmat ion ............. 104, 2 12
Consumpt ion (f ue l) . . . . . . . . . . . . . . . . . . . . 19
Cont acti ng NH TSA . . . . . . . . . . . . . . . . . . . . 104
Convenience key Starting the engi ne . . . . . . . . . . . . . . . . . . . 61
S topping the engine . . . . . . . . . . . . . . . . . . 62
Sw itchi ng the ignition on . . . . . . . . . . . . . . 6 1
Unlo cking/lock ing . . . . . . . . . . . . . . . . . . . . 24
Convenience opening/closing . . . . . . . . . . . . 31
Convertible chi ld safety seats . . . . . . . . . . . 141
Conve rt ible locking retractor
Activa ting . . . . . . . . . . . . . . . . . . . . . . . . . . 146
D eactivating . . . . . . . . . . . . . . . . . . . . . . . . 146
Using to secure a child safety seat . . . . . . 146
Cooling mode (automatic climate control sys-
tem) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
Cooling mode (manual climate control sys-
tem) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
Cooling system Adding coolant . . . . . . . . . . . . . . . . . . . . . . 162
Coolant . . . . . . . . . . . . . . . . . . . . . . . . . . . . 162
218
Coolant level checking . . . . . . . . . . . . . . . . 162
Coo lant temperature . . . . . . . . . . . . . . . . . . . 8
C rossing water . . . . . . . . . . . . . . . . . . . . . 5 7, 66
Cruise control system . . . . . . . . . . . . . . . . . . . 76
Cup ho lders . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
C u rrent consumpt ion . . . . . . . . . . . . . . . . . . . 19
D
Data recorder . . . . . . . . . . . . . . . . . . . . . . . . . 95
Date.... ... .. .. .. .. .. ... . .. .... ... .. .. 9
Dayt ime run ning lights . . . . . . . . . . . . . . . . . 33
Declaration of compliance . . . . . . . . . . . . . . 215
Defros ting (w indows)
Automat ic climate contro l system . . . . . . . 55
Manua l cl imate control system . . . . . . . . . . 52
D EF (instrument clus ter) . . . . . . . . . . . . . . . . . 9
Dete rm ining correct load limit . . . . . . . . . . 180
D igital compass . . . . . . . . . . . . . . . . . . . . . . . 40
D imens ions . . . . . . . . . . . . . . . . . . . . . . . . . . 210
Dimming t he exterior mirro rs . . . . . . . . . . . . 36
D imm ing the rearv iew mi rror . . . . . . . . . . . . 3 6
D isplay
Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . 187
Distance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Doors Child safe ty lo ck . . . . . . . . . . . . . . . . . . . . . . 30
E mergency locking . . . . . . . . . . . . . . . . . . . . 26
Driver informat ion system
D river messages . . . . . . . . . . . . . . . . . . . . . . 19
E ffic iency program . . . . . . . . . . . . . . . . . . . . 20
On-board comp uter . . . . . . . . . . . . . . . . . . . 19
Operat ing using t he m ultif unction steer ing
whee l . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Operat ing using windsh ield wiper lever . . . 18
Overv iew . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Se rvice interva l display . . . . . . . . . . . . . . . 165
D rive r se at
refer to Seating posi tion . . . . . . . . . . . . . . . 98
D rive select
refer to Aud i d rive select . . . . . . . . . . . . . . . 80
Driving econom ically . . . . . . . . . . . . . . . . . . . 57
Driving off road . . . . . . . . . . . . . . . . . . . . . . . . 65
Drivi ng safe ly . . . . . . . . . . . . . . . . . . . . . . . . . 97
D riving through water .. ... . .. .... ... 57, 66
D rivi ng time . . . . . . . . . . . . . . . . . . . . . . . . . . 19

0 co ......
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Dust filter
refer to Pollutant filter . . . . . . . . . . . . . . . . S 1
E
EDL
refer to Electronic Differential Lock . . . . . . 89
Efficiency program
Fuel economy messages . . . . . . . . . . . . . . .
21
Other equipment . . . . . . . . . . . . . . . . . . . . . 20
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Electromechanical parking brake . . . . . . . . . 63
Electromechanical steering . . . . . . . . . . . . . . 93
E lectronic Differential Lock . . . . . . . . . . . . . .
89
Electronic immobilizer . . . . . . . . . . . . . . . . . . 23
Electronic stabilization control . . . . . . . . . . .
89
Electronic Stabilization Control
Hill descent assist . . . . . . . . . . . . . . . . . . . .
91
Offroad mode . . . . . . . . . . . . . . . . . . . . . . . . 90
Emergency assistance . . . . . . . . . . . . . . . . . 191
Emergency braking function . . . . . . . . . . . . . 64
Emergency flashers . . . . . . . . . . . . . . . . . . . . 34
Emergency locking the front passenger's door .26
Emergency operation
Front passenger's door . . . . . . . . . . . . . . . .
26
Fuel filler door . . . . . . . . . . . . . . . . . . . . . . 155
Luggage compartment lid . . . . . . . . . . . . . . 29
Panorama glass roof . . . . . . . . . . . . . . . . . . 32
Sunshade (roof) . . . . . . . . . . . . . . . . . . . . . . 32
Emergency release
Selector lever . . . . . . . . . . . . . . . . . . . . . . . .
72
E mergency starting . . . . . . . . . . . . . . . . . . . 203
Emergency unlocking/locking
On lock cylinder . . . . . . . . . . . . . . . . . . . . . .
26
Emissions control system
Catalytic converter . . . . . . . . . . . . . . . . . . .
155
Energy management . . . . . . . . . . . . . . . . . . . 94
Engine
Coolant . . . . . . . . . . . . . . . . . . . . . . . . . . . .
162
Starting/stopping (convenience key) . . 61, 62
Starting/stopping (ignition lock) . . . . . . . . 60
Starting with jumper cables . . . . . . . . . . . 203
Stopping (ign ition lock) . . . . . . . . . . . . . . . .
60
Engine compartment . . . . . . . . . . . . . . . . . . 155
Engine oil . . . . . . . . . . . . . . . . . . . . . . . . . . . 158
Adding . . . . . . . . . . . . . . . . . . . . . . . . . . . . 160
Changing . . . . . . . . . . . . . . . . . . . . . . . . . . 161
Index
Checking the engine oil level . . . . . . . . . . . 160
Dipstick . . . . . . . . . . . . . . . . . . . . . . . . . . . . 160
Economy... ... .. .. ................. 160
Oil consumption . . . . . . . . . . . . . . . . . . . . . 159
Oil grades . . . . . . . . . . . . . . . . . . . . . . . . . . 158
Specification and viscosity . . . . . . . . . . . . . 158
Engine speed limitation (indicator light) 15
Environment
Proper disposal of drained engine oil . . . .
161
Unleaded gasoline . . . . . . . . . . . . . . . . . . . 152
EPC (engine control) . . . . . . . . . . . . . . . . . . . . 14
ESC
refer to Electronic stabilization control . . . 89
Event Data Recorder (EDR) . . . . . . . . . . . . . . 95
Exterior lighting
33
Exterior mirrors Adjusting . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
D. . 1mm1ng .. .. .. .. .. ............... .. . 36
Heating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
F
Fastening
Booster seats . . . . . . . . . . . . . . . . . . . . . . .
142
Convertible child safety seats . . . . . . . . . . 141
Infant seats . . . . . . . . . . . . . . . . . . . . . . . . 140
Federal Communications Commission (FCC) 215
Floor mats . . . . . . . . . . . . . . . . . . . . . . . . . . . 101
Folding the rear seats. . . . . . . . . . . . . . . . . . . 47
Foot pedals . . . . . . . . . . . . . . . . . . . . . . . . . . 101
For the sake of the environment
Environmentally-friendly driving . . . . . . . .
57
Fueling . . . . . . . . . . . . . . . . . . . . . . . . . . . . 153
Leaks. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 156
Roof rack . . . . . . . . . . . . . . . . . . . . . . . . . . . SO
Freeze protection Coo lant . . . . . . . . . . . . . . . . . . . . . . . . . . . .
162
Front airbags
Description . . . . . . . . . . . . . . . . . . . . . . . . .
118
How they work . . . . . . . . . . . . . . . . . . . . . . 122
Frontal collisions and the laws of physics . . 107
Front seats . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Adjusting . . . . . . . . . . . . . . . . . . . . . . . . . . . 99
Child restraints in the front seat ...... . .
Fuel
. . ...... ... .. .. ... ....... ... .. . .
115
152
Additives . . . . . . . . . . . . . . . . . . . . . . . . . . . 152
Blended gasoline . . . . . . . . . . . . . . . . . . . . 152
219