2018 AUDI Q5 check engine

Check ing and F illing
On -Board Diagnostic S yst em
Eng ine data can be read out at the On-Board D i­
agnostic System connection po rt using a special
testing device
¢ fig. 257 .
Indicator light
Ift hP ¢..ifi indicato r light b lin ks o r tu rns o n, there
is a malfunction that is caus ing poor emiss ions
qua lity and that could damage the catalytic con ­
verter.
Dr ive s low ly to an author ized Audi dealer or au­
thor ized Audi Se rvice Fac il ity to have the ma l­
f u nction co rrected.
The indicator l ight can also turn on if the fuel fi ll­
er cap is not closed correct ly
9 page 311.
_& WARNING
Incorrect use of the connection po rt fo r th e
On-Board Diagnostic Sys tem can ca use mal ­
functions, which can then result in accidents
and serious injuries.
- Only allow an authorized Audi dealer or au ­
thorized Audi Service Facility to read out the
engine data .
Engine compartment
Working in the engine compartment
Special care is required if you are working in the
engine compartment
-
Fo r w ork in th e engi ne comp artm ent su ch as
c heck ing and filli ng flu id s, the re is a risk of in ­
jur y, scalding , ac cident s, and b urns . Fo r this
r easo n, follow all th e warning s and g enera l
sa fe ty preca ution s pro vided in the foll owin g in­
f o rm ation . Th e e ng ine comp artmen t is a d an­
ger ous ar ea .
9 &, .
_& WARNING
- T urn the eng ine off.
- Switch the ig nition off.
- Set the parking brake .
- Select the "P" selector lever pos it io n.
- let the engine coo l down.
314
- Never open the hood when there is steam or
coo lant escaping from the engine compart­
ment, because there is a risk that you could
be burned . Wait unt il no steam or coolant is
escaping.
- Keep children away from the eng ine com­
partment .
- Never sp ill fluids on a hot engine . These flu­
ids (such as the anti-freezing agent con­
tained in the coolant) can ignite .
- Avoid short c ircuits in the electrical system.
- When working in the engine compartment, remember that the radiator fan can switch
on even if the ignition is switched off, wh ich
increases the r isk of injury .
- Never open the cap on the coolant expan­
sion tank when the engine is warm . The
cool ing system is under pressure .
- To protect your face, hands, and arms from
hot steam or coolant, cover the cap w ith a
large cloth when open ing.
- Do not remove the engine cover under any
circumstances . This increases the risk of
burns .
- If tests need to be performed with the en­
gine runni ng, there is add itiona l danger due
to mov ing components (such as the r ibbed
be lt, alte rnato r and rad iato r fan) and from
the hig h-voltage ignition system.
- Do not unde r any ci rcumstances activate the
throttle inadvertent ly (for example, by hand
from the engine compartment) if the veh i­
cle is stationary but the engine is running
and a gear is engaged. Otherwise, the vehi ­
cle will start to move immediate ly and this
could result in an acc ident.
- Pay attention to the following warnings
when work on the fue l system is required:
- Do not smoke.
- Never work near open flames .
- Always have a working fire extinguisher
nearby.
- All work on the battery or electrical system in your vehicle can result in injuries, chemi­
cal burns, acc idents or burns . Because of
this, all work must be performed
only by an
author ized Audi dealer or author ized Audi
Serv ice Faci lity.

u co ..... N r-­N .....
~ 0 co
-To reduce the risk of electric shock and in­
jury, never touch the following components
when the engine is running or is being start­
ed :
- Ignition cable
- Other components in the electronic high-
voltage ignition system
- If you must check or perform work on the
engine while it is running:
- Set the parking brake first and then select
the
"P" selector lever position .
- Always proceed with extreme caution so
that clothing, jewelry or long hair do not
become caught in the radiator fan, fan
belt or other moving components or do
not come into contact with hot compo­ nents. Tie back long hair before beginning
work and do not wear cloth ing that can
hang down into the engine.
- Limit your exposure to exhaust and chemi­
cals to as short a time as possible
c::> & .
..&, WARNING
California Proposition 65 Warning:
- Engine exhaust, some of its constituents,
and certain vehicle components contain or
emit chemicals known to the State of Cali­
fornia to cause cancer and birth defects and
reproductive harm. In addition, certain flu­
ids contained in vehicles and certain prod­
ucts of component wear contain or emit
chemicals known to the State of California
to cause cancer and birth defects or other
reproductive harm.
- Battery posts, terminals and related acces­
sories contain lead and lead compounds, chemicals known to the State of California
to cause cancer and reproductive harms.
Wash hands after handling.
(D Note
When filling fluids, be sure not to mix the flu­
ids up . Otherwise severe malfunctions and en­
gine damage will occur.
Checking and Filling
@) For the sake of the environment
You should regularly check the ground under
your vehicle in order to detect leaks quickly.
If
there are visible spots from oil or other fluids,
bring your vehicle to an authorized Audi deal­
er or authorized Audi Service Facility to be
checked .
Opening/closing the hood
The hood is released from inside the vehicle .
Fig. 258 Driver footwell : relea se lever
Fig. 259 Unlocked hood: lever
Make sure the wiper arms are not raised up from
the windshield . Otherwise the paint could be
damaged.
Opening the hood
.,. With the driver 's door open, pull the lever be­
low the instrument panel in the direction of the
arrow
c::, fig. 258.
.,. Raise the hood slightly c::> &.-
.. Press the lever c::, fig. 259 in the direction of the
arrow. This releases the hooks .
.,. Open the hood. ..,.
315

Checking and Filling
Cl osing the ho od
~ Push the hood down until you overr ide the
force of t he struts .
~ Let the hood fall light ly into the latch. Do not
press it in.
c::> &_ .
A WARNING
-Never open the hood when there is steam or
coolant escaping from the engine compart­
ment, because there is a risk that you could
be burned. Wait until no steam or coolant is
escaping.
Engine compartment overview
The most important check points .
-For safety reasons, the hood must always be
latched securely while dr iving. Because of
this, always check the hood after closing it
to make sure it is latched correctly . The
hood is latched if the front corners cannot
be lifted .
-If you notice that the hood is not latched
while you are driving, stop immed iate ly and
close it, because d riving when the hood is
not latched increases the r is k of an accident.
-If the hood is not latched comp letely, it
could f ly up wh ile you are driving and ob­
s t ruc t your vis ion.
F ig . 260 Typical location of the rese rvoir and the engine o il fil le r open ing
@ Washer fluid rese rvoir (W) c::> page 323
@ J ump start po int(+) under a cover,(-) w ith
hex head screw
c::> page 323 c::> page 363
® Eng ine oi l filler openi ng (9:=r.) c::> page 317
@ Eng ine oi l label * w ith VW st andard
c;, page 317
® Coolant expans ion tank (-L) c::> page 320
316
@ B rake fl uid reservo ir (Oi) c::>pag e 321
The location of the eng ine o il filling open ing ®
and the coolant expansion tank ®
c::> fig. 260
may differ depending on the eng ine version .
Iii>

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A WARNING
Read and follow all WARNINGS before check­
ing anything in the eng ine compartment
9poge 314.
Engine oil
If the engine oil level is too low
If you need to add engine oil, use an oil that is
listed on the sticker.
The sticker is located at the
front of the engine compartment
9 poge 316,
fig. 260.
I f the recommended engine oil is not available,
in an emergency you may add a maximum of 1
quart
Cl liter) of ACEA C3 or API SN engine oil
one time until the next oil change.
F or more information on the correct engine oil
for your ve hicle, contact an authorized Audi dea l­
er or authorized Audi Service Facility. Have the oil
changed by an authorized Audi dealer or author­ ized Service Fac ility.
Audi recommends
~cas jjjjfl /[email protected] Fr,w.::«:J.o,-JAl.
Audi recommends using the Long Life high­
performance engine oil from Audi Genuine
Parts.
Checking the engine oil level
The engine oil level con be checked in the Info­
tainment system
Observe the safety precautions c::> & in Working
in the engine comportment on page 314.
~ Park your vehicle on a level surface.
~ S hu t the engine off when it is warm.
~ Switch only the ignition back on.
~ Wait approx imately two minutes.
~ Select in the Infotainment system: the I MENU I
button > Vehicle > left control button > Service
& checks
> Oil level.
~ Read the oi l level in the display. Add engine oil
if the bar in the oil leve l indicator is just before
"min"
c::> page 318.
Checking and Filling
@ Note
The engine oi l level must not be under the
"min" marking, as th is w ill increase the risk of
engine damage.
(D Tips
The oil leve l indicator in the display is only an
informational display.
If the oil leve l is too
l ow, a min imum oil warning appears in the in­
strument cluster. Add oil and close the hood.
The current oil level is displayed in the Info­
tainment system the next time the ignition is
switched on .
(D Tips
The engine oil consumption may be up to
0.5 quart/600 miles (0.5 liter/1,000 km), de­
pending on driv ing sty le and operat ing cond i­
tions. Consumption may be higher dur ing the
first 3,000 miles (5,000 km). Because of this,
the engine o il level must be checked regular­
l y . It is best to check each time you refuel
your vehicle and before long drives.
- In order to provide effective lubrication and
cooling of internal engine components, a ll
internal combustion engines consume acer ­
tain amount of oil. Oil consumption varies
from engine to engine and may change sig­
nifica ntly over the life of the engine. Typ i­
cally, eng ines with a specified break-in peri­
od consume more oil during the break-in pe­
r iod than they consume after oil cons ump­
t ion has stabilized.
- Under normal conditions, the rate of oil
consumption depends on the quality and
viscos ity of the oil, the RPM (revo lutions per
min ute) at which the engine is operated, the
ambient temperature and road conditions.
Further factors are the amount of oil dilu­
tion from water condensation or fue l resi­
due and the oxidation level of the oil. As any
eng ine is subject to wear as m ileage builds
up, the oil consumption may increase over
time until replacement of worn components
may become necessary.
.,..
317

Checking and Filling
-With all these variables coming into play,
no standard rate of o il consumption can be
established or specified. There is no alterna­
tive to checking the oil level regularly and
frequently.
- If you have the impression your engine con­
sumes excessive amounts of oil, we recom­
mend that you consult an authorized Audi
dealer to have the cause of your concern properly diagnosed . Keep in mind that the
accurate measurement of oil consumption
requires great care and may take some
time. An authorized Audi dealer has instruc­
tions about how to measure oil consump­
tion accurately.
- You can find information on engine oil and
engine oil capacities for the USA at
www.audiusa.com/help/maintenance, or
for Canada at www.audi.ca/ca/web/en/
customer-area/ care-a nd-maintena nee/ aud
i­
service-schedules. html , or call
800 -822-2834.
Adding engine oil
Fig. 261 Engine co mpartment : en gin e oil fille r opening
c ove r
0 N
-N ,.:
gi
Observe the safety precautions c::, &. in Working
in the engine compartment on page 314.
"Turn the engine off.
" Open the hood c::, page 315.
" Unscrew the cap 't=?1 for the engine oil filler
opening
c::, fig. 261.
,.. Carefully add O.S quart (0 .5 liter) of the correct
oil
c::, page 317.
,.. Close the engine oil filler opening cap.
,.. Close the hood.
318
,.. Restart the ignition after two minutes and read
the current oil level in the Infota inment system
c::, page 317, Checking the engine oil level.
"Add more oil if necessary.
A WARNING
- When adding oil, do not let oil drip onto hot
engine components . This increases the risk
of afire.
- You must seal the cap on the oil filler open­
ing correctly so that oil does not leak out
onto the hot engine and exhaust system
when the engine is running, because this is
a fire hazard.
-Always clean skin thoroughly if it comes into
contact with engine oil.
- Engine oil is poisonous and must be kept
out of reach of children.
- Store the engine oil securely in the original
container.
(D Note
- If the message II Please reduce oil level
appears, there is too much oil in the engine
and there is a risk of catalytic converter and
engine damage. Do not start the engine.
Contact an authorized Audi dealer or au­
thorized Audi Service Facility to have excess
engine oil extracted if necessary.
- Your Limited New Vehicle Warranty does
not cover damage or malfunctions due to
failure to follow recommended mainte­
nance and use requirements as set forth in
the Audi Owner's Manual and Warranty &
Maintenance booklet.
- Use only a high quality engine oil that ex­
pressly complies with the Audi oil quality
standard specified for your vehicle's engine. Using any other oil can cause serious engine
damage .
- Do not mix any additional lubricants into
the engine oil. Damage caused by such addi­
tives is not covered by the warranty .
@ For the sake of the environment
-Oil should never enter the sewer system or
come into contact with the ground .

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-Pay attention to legal requirements when
disposing of empty oi l containers .
Changing the engine oil
We recommend that have your oil changed by an
authorized Audi dealer or a qualified service sta­
tion .
Before you check anyt hing in the eng ine compart ­
ment,
alwa ys read and heed all WARNING S¢.&.
in Working in the engine comportment on
page 314.
The engine oil must be changed accord ing to the
intervals specified in your Warranty
& Mainte­
nance booklet . This is very important because the
lubricat ing propert ies of oil diminish gradually
during normal vehicle use.
Under some circumstances the engine oi l should
be changed more frequently. Change oil more of­
ten if you drive most ly short distances, operate
the vehicle in dusty areas or under predominant ly
stop-and-go traffic condit ions, or have your vehi­
cle where temperatures remain below freezing
for extended periods.
Detergent additives in the oil will make fresh oil
look dark after the engine has been running for a
short time. Th is is normal and is not a reason to
change the oil more often than recommended.
Because of the problem of proper disposal, along
with the special tools and necessary expertise re­
qu ired, we strongly recommend that you have
your oil c hanged by an authorized
A udi de aler or
a qualified service station .
If you choos e to change your o il y our self , please
note the following important information:
A WARNING
T o red uce the r isk of pe rsonal injury if yo u
must change the engine oil in your ve hicle
yourse lf:
-Wear eye p rotection.
-To reduce the risk of burns from hot engine
o il, let the eng ine cool down to the touch.
-
-Whe n removing the o il drain plug with your
fingers, stay as far away as poss ible. A lways
Ch eck ing and F illing
keep your forearm pa rallel to the ground to
he lp prevent hot oil from running down your
arm.
-Drain the oil into a container designed for
this purpose, one la rge enough to hold at
least the tota l amount of oil in your engine.
-Engine oil is poisonous. Keep it well out of
the reach of children.
-Continuous contact with used engine o il is
harmful to your skin. Always protect your
skin by washing oil off thoroughly with soap
a nd water.
@ Note
Never mix oil additives with yo ur engine oil.
These additives can damage your engine and
adverse ly affect your Audi limited New Vehi­
cle Warranty.
@) For the sake of the environment
-Before chang ing your oi l, first ma ke sure
you know where you can properly d ispose of
the used oil.
-Always dispose of used engine o il properly.
Do not dump it on garden so il, wooded
areas, into open streams o r down sewage
dra ins.
-Recycle used eng ine o il by tak ing it to a used
eng ine oi l collec tion fac ility in yo ur area, or
contact a se rvice station.
Cooling system
Coolant
The eng ine cooling system is fi lled w ith a mixture
of purified water and coolant additive at the fac­
tory. This coolant must not be not changed.
T he coo lant level is monitored through
the . in­
dicator light
¢page 23. However, we do recom­
mend occasionally checking the coolant leve l
manual ly.
If you must add coo lant, use a mixture of water
and coolant additive. Mixing the coolant add itive
with dist illed water is recommended.
IIJ>-
319

Checking and Filling
Coolant addit ive
The coolan t additive is made of anti-freezi ng and
corrosion protection agents. Only use the fo llow ­
ing coolant additives . These additives may be
mixed w ith each other.
Coolant additive Specification
G 12e vo
TL 774 L
G12 ++ TL 774 G
G13 TL 774)
The amount of coolant additive that needs to be
mixed with water depends on the climate where
the vehicle will be operated. If the coolant addi­
tive percentage is too low, the coolant can freeze
and damage the engine.
Coolant Freeze protec-
tion
additive
Warm min . 40% m in . -13 °F
reg ions (-25
°C)
max . 45%
Cold min. 50% max.
-40 °F
reg ions (-40 °C)
max. 55%
(D Note
- Before the start of winter, have an author­
i zed Audi dealer or authorized Audi Service
Fac ility check if the coolant additive in your
vehicle matches the percentage appropriate
fo r the climate. This is especially important
when driving in co lde r climates.
- If the appropriate coolant additive is not
available in an emergency, do no t add any
othe r addi tive. You cou ld d amage the en­
gine. If this happens, only use water and re­
store the correct mixture ra tio with the
specified coolant additive as soon as possi­
ble.
- Only refill with new coo lant.
- Radia tor sealan t must no t be m ixed w it h
the coo lant .
320
Adding coolant
(l!J .. ,
Fig. 262 En g in e compartment: release butto n on coola nt
expansio n tank
Observe the safety precautions ¢ page 314,
Working in the engine compartment.
Checking the engine coolant level
" Park the vehicle on a level surface.
11> Switch the igni tion off.
" Read the coolant level on the coolan t expansion
t ank
¢ fig. 262.
"T he coolant level must be between the MIN and
MAX marki ngs when the engine in cold . When
the engine is warm it can be slightly above the
MAX marking.
Adding coolant
Requireme nt: there m ust be a residual amount of
coolant in the expansion tank
¢ (D.
"Le t the engi ne cool down.
" Place a clot h over the coo lant exp ansion tank
cap.
" Push the release button ¢ fig. 262 and carefu l­
ly unscrew the cap to the left unti l you feel re­
sistance ¢ _A.
"Push the release button aga in and remove the
cap completely.
" Add coo la nt m ixed in the correct rat io
r:=;, page 319 up to the MAX mark ing .
" Ma ke sure that the f luid level remains stab le .
Add mo re coolan t if ne cessa ry .
" Tur n the cap to the r ight to secure it until you
fee l resista nce a second time .
Coo la nt loss us ually ind icates there is a lea k. Im­
med iate ly dr ive you r veh icle to a n author ized
Audi dealer or au thor ized Audi Servi ce Fac ility
and have the cooling system ins pected .
If the

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cooli ng system is not le aking, a loss can come
from the coolant boili ng through overheating
and being pushed out of the cooling system.
.&_ WARNING
-The cooling system is under pressure. Do
not open the coolant expansion tank cap
when the eng ine is hot. This inc reases the
risk of burns.
- The coo lant add itive and the coolant can be
dangerous to you r healt h. For this reason,
keep t he coolant i n the o rigi nal container
and away from children. There is a risk of
poiso ning.
- When working in the engine compartment,
remember t hat the radiator fan can sw itch
o n even if the ign ition is swi tched off, which
increases the risk of i njury.
@ Note
Do not add coo lant if the expansion tank is
empty. There may be a ir in the coo ling sys­
t em, wh ich increases t he risk of engi ne dam­
age . If this is the case, do not continue driv­
ing . See an authorized Aud i dea le r or a uthor ­
ize d Aud i Service Fac ility for assistance .
Brake fluid
-
N N ~ N
""
CX) IXl
Fig . 2 63 Engi ne compartme nt: cap o n brake fluid reservoir
Observe the safety p recautions 9 &. in Working
in the engine comportment on page 31 4.
Checking the brake fluid level
"' Read the brake fluid level on the brake fluid
reservoir ¢
page 316, fig . 260. The brake fluid
level must be between the MI N and MAX mark­
ings ¢,&. .
Chec king and Filling
The brake f lu id leve l is moni to red automatically .
Changing the brake fluid
Have the brake fluid changed regularly by an au­
t h ori zed Audi dea le r or a uthor ized Audi Service
F ac ility.
A WARNING
-
- I f the b rake fl uid level is below t he MIN
marking, it can impair the brak ing effect
and d riving safety, which increase the risk of
an accident. Do not continue dr iving. See an
author ized Audi dealer or author ized Audi
Serv ice Facility for assistance.
- If the b rake fl uid is old, b ubbles may form
in the brake system dur ing heavy bra king.
This wo uld impair braking performance and
driving safety, which increases the r isk of an
accident.
- To ensure the brake system functions cor­ rectly, only use brake f luids tha t comply
wit h VW standard S0 l 14 o r
F M VSS -116 DOT 4 .
(D Note
-If the brake flu id leve l is above the MAX
ma rking, bra ke f luid may leak o ut over the
edge of the reservo ir and resul t in damage
t o the vehicle.
- Do not ge t any brake fl uid on the vehicle
pai nt, because it w ill corrode the paint.
Battery
General warnings about batteries
Because of the complex power supply, all work
on batter ies such as d isconnecting, replacing,
etc., sho uld
only be performed by an authorized
Audi dealer or author ized A udi Se rvice Facility
¢ &_ .
The term "veh icle battery" refers to the 12 Volt
batte ry in your vehicle.
..,.
321