2018 AUDI Q7 check engine

Tele phone
Telephone
Introduction
Applies to: vehicles with telephone
To make phone coils in your vehicle using the
/11/111, connect your cell phone to the /11/111 via
Bluetooth.
Hand sfree
After you have connected your ce ll phone to the
MMI via Bluetooth, you can use the handsfree
system and operate telephone functions through
your MMI. You can make calls using the antenna
on your cell phone.
A WARNING
- Medical experts warn that cell phones can
interfere w ith the funct ion of pacemakers .
Always mainta in a m inimum d istance of
about 8 inches (20 cm) between the ce ll
phone antenna and the pacemaker.
- Do not carry the cell phone in a pocket di ­
rectly over the pacemaker when the phone
is switched on.
- Sw itch the cell phone off immediately if
you suspect it may be interfering w ith the
pacemaker.
- Do not use the vo ice recognit ion system*
<=) page 167 in emergencies because your
vo ice may change in stressful situations. It
may take longer to dial the number or the
system may not be able to dia l it at all. Dial
the emergency n umbe r manua lly.
- Switch your cell phone off in areas where
there is a ris k of an exp losion . These loca­
tions are not always clearly mar ked. This
may include gas stations, fuel and chemical
storage facilities or transport vehicles, o r lo ­
cations where fue l vapors (such as propane
or gaso line vapor in vehicles or bui ldings),
chemicals or large quantities of dust parti ­
cles (such as flour, sawdust or metal) may
be present in the air . This also applies to all
other locations where you would normally
turn your vehicle engine off .
- The demands of traffic requ ire your full at­
tent io n. Always read the chapter
Q page 149, Traffic safety information.
174
-
@ Note
Always fo llow the information found in Q @ in
Wi -Fi hotspot on page 194.
(D Tips
- Th e Bluetooth connect ion range is limited
to inside the vehicle. It can also be affected by local conditions and interference with
other devices .
- To learn which Bluetooth connections and
wh ich of the funct ions in your ce ll phone are
supported, check with your cell phone serv­
ice provider or the database for mob ile devi­
ces at www .aud iusa .com/bluetooth.
Setup
Connecting a cell phone using Bluetooth
Applies to: vehicles with telephone
Fig . 172 D isp layin g the PIN for enter ing in t he cell phone
R equi rem ent
The vehicle must be stationary and the ignition
must be switched on.
The Bl uetooth settings m ust be open on your cell
phone during the connection setup.
The Bluetooth funct io n and v is ib il ity of the MMI
Q page 248 and cell phone must be sw itched on.
The cell phone to be connected must not be con­ nected to any other Bluetooth device .
The MMI must not be connected to a cell phone.
Conn ecting a c ell phon e
.. Select: IMENU I button> Telephone > Connect
mobile de vice > Find new de vic es > Next.
The
avai lab le Bluetooth devices are shown in the In-
fotainment system display.
Or select: ! MENUI 1111-

Checking and Filling
Checking and Filling Fuel
Gasoline grade
A pp lies to: ve hicles w ith gasoline engines
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 with
unleaded gasoline.
Audi recommends using TOP TIER Detergent Gas­
oline. Additional information on TOP TIER Deter­
gent Gasoline can be found on the official web­
site (www .toptiergas.com).
The individual gasoline grades are differentiated
by
octane ratings. This value is given with (R +M)/
2 equating to AKI or in RON.
The following headings match the corresponding
sticker in the fuel filler door .
UNLEADED FUEL ONLY MIN. (R+M)/2 87
Regular/ MIN. RON 91 Regular
Use regular gasoline with minimum 87 AKI/
91 RON
i::>@ .
The max imum eng ine power is only reached if
p rem ium gasol ine 91 AKI/ 95 RON is used.
UNLEADED FUEL ONLY PREMIUM MIN. (R
+M)/2 91 / SUPER MIN. RON 95
Using premium gaso line with minimum 91 AKI/
95 RON is recommended.
If premium gasoline is not available, you can also use regular gasoline 87 AKI/ 91 RON . However
this does reduce th e engine powe r slight ly.
0 Note
- Fillin g the tank just one time with leaded
fuel or other metallic additives will cause
permanent deter iorat ion to the catalytic
converter function.
- When gasoline with an octane rat ing that is
too low is used , h igh speeds or heavy engine
load can lead to engine damage.
310
(D Tips
The vehicle may be filled with fuel that has a
h igher octane rating than what is required by
the eng ine.
Blended gasoline
App lies to : vehicles wi th gaso line e ngi ne
Use of gasoline containing alcohol or MTBE
(methyl tertiary butyl ether)
You may use unleaded gasoline blended with al ­
cohol or MTBE (commonly referred to as oxygen­
ates) if the blended mixture meets the following
criteria:
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 gasoline and ethanol (grain alcohol or
ethyl alcohol)
-Anti-knock index must be 87 AK I or h igher.
- Blend must not conta in more than 15% etha-
nol.
Blend of gasoline and MTBE
- Anti -knock index must be 87 AKI or higher.
- Blend must not contain more than 15% MTBE.
Seasonally adjusted gasoline
Many gasoline grades are blended to perform es­
pecially well for winter or summer dr iv ing . Dur­
i ng seasonal change-over, we suggest that you
fill up at busy gas stat ions where the seasonal
adjustment is more lik ely to be made in t ime.
@ Note
- Methanol fuels which do not meet these re­
quirements may cause corrosion and dam­
age to plastic and rubber components in the
fuel system.
- Do not u se fue ls that fail to meet the speci-
fied criteria in this chapter. ...

Cl a:, ...... N
" N ...... 0
0
::r ' -If you are unable to determine whether or
not a particular fue l blend meets the speci ­
ficat ions, ask your service station or its fuel
supplier.
- Do not use fuel for which the contents can ­
not be identified.
- Fuel system damage and performance prob ­
l ems resulting from the use of fue ls differ­
ent from those specif ied are not the respon­
s ibility of Audi and are not covered under
the New Veh icle or the Emiss ion Control
System Warrant ies .
- If you experience a loss of fue l economy or
driveability and performance problems due
to the use of one of these fuel blends, we
r ecommend that you switch to unblended
fuel.
Gasoline additives
A ma jor concern among many auto manufactur ­
ers is carbon deposit build-up caused by the type
of gasoline yo u use.
A lthough gasoline grades d iffer from one manu­
facturer to another, they have certain things in
common . A ll gasoline grades contain substances
that can cause deposits to collect on vita l engine
parts, such as fue l injectors and intake valves. A l­
though most gasoline brands include additives to keep engine and fuel systems clean, they are not
equally effective .
Audi recommends using TOP TIER Detergent Gas­
oline. For more informat ion on TOP TIER Deter­
gent Gasoline, please go to the official website
(www .toptiergas .com) .
After an extended period of using inadequate
fuels, carbon deposit build-ups can rob your en­
g ine of peak performance.
@ Note
Damage or malfunction due to poor fuel q ual­
ity is not covered by the Aud i New Vehicle
Limited Warranty.
Ch eck ing and F illing
Diesel fuel
App lies to : veh icles w it h diese l eng ine
Always use U LSD (Ult ra Low Sulfur Diesel) No. 2.
T he ULSD No. 2 meets the AS TM D975.
D iesel fuel w ith concentrations of b iod iesel h igh­
er than 5
% such as B 11, B20 or B100 are strict ly
proh ib ited.
Service station fuel pumps are labeled with the
correct fuel information for easy recogn it ion by
the user . If the d iesel fue l pump is not labeled
ask the station operator what fuel is being dis ­
pensed before fill ing up your vehicle.
U LSD No . 2 may not be ava ilable outside the USA
and Canada . Be su re to check befo re traveling to
othe r countr ies.
ULSD No . 2 can become thicker in very cold tem­
peratures, and th is can impa ir the engine's start­
i ng and runn ing . Depend ing on the season , gas
stations provide ULSD No. 2 that flows bette r in
co ld tempe ra tures so that you can co nti nu e ope r­
at ing you r vehicle as usual.
{Qj) Note
- Yo ur vehicle's d iese l eng ine was des igned
so ley for use w ith ULS D No. 2. Therefo re,
never use gasoline, heating oil, other f uels
or flow improvers. These contain s ubstances
that will severely damage the fuel system
and the engine. Such damage will not be
covered by your New Vehicle Limited War­
ranty.
- If you put any amo unt of incorrect fuel in
the fuel tank, do not start the engine under
any c ircumstances. Immed iately contact the
nearest author ized Audi dealer or author­
ized Aud i Serv ice Facility fo r ass istance.
Th ese f uels con ta in substa nces that can se­
verely damage the fuel system a nd the en ­
gine if the engi ne is st arted.
311

Checking and Filling
Fuel filler door emergency release
If the central locking system is faulty, the fuel
filler door can be unlocked manually.
•
Fig . 256 Lu ggage compartment: removing the light cover
•
Fig . 257 Luggage compartment: fuel fi ller door emergency
r ele ase
The emergency release mec hanism is located be ­
h ind the r ight light cover in the luggage compart­
ment .
.. Use a screwdriver to remove the light cover
.:>fig . 256 .
.. Loosen the loop from the retainer and then pull
on the loop carefully
c> fig. 257 i=> @. The filler
doo r is released .
.. Press on the left side of the fuel fille r door to
open it
c> page 312, fig . 254.
@ Note
O nl y pull on the loop until you feel resistance .
You will not hear it release. Otherwise yo u
co uld damage the emergency re lease mecha­
nism .
314
Selective catalytic
reduction (AdBlue/DEF)
General information
App lies to: vehicles with selective catalytic reduct ion
In vehicles with selective catalytic reduction, a
urea solution (AdBlue/DEF) is injected into the
exhaust system in front of a nitrogen oxide cata­ l ytic converter to reduce nitrogen em issions. The
urea solution is known as Ad Blue or DEF (Diesel
Exhaust Fluid) . The informat ion that follows w ill
u se the name Ad B lue .
The Ad Blue is carried in a separate tank in the ve­
hicle. The AdBlue consumption depends on the
dr iv ing behavior and veh icle operat ing cond i­
tions .
It is within a range of 1.0 L -3.0L every 600
miles (1,000 km). In some cases, the consump­
tion may a lso differ from this range depending
o n the dr iving behavior and vehicle operat ing
cond it ions.
When a message about refi lling the AdBlue ap­
pears in the instrument cl uster display, you must
refi ll the Ad B lue yourse lf or have it refilled by an
authorized Aud i dea le r o r a utho rized Audi Service
Facility
c> page 315.
(D Tips
- T he d isp lay ind icates the dista nce rema ining
that can be dr iven
c> page 314 . If the Ad Bl ­
ue tank is completely empty, the engine will
not start again after the ignition is switched
off .
- Ad Blue is required by law to operate this ve ­
hicle .
Messages in the instrument cluster display
App lies to: vehicles with selective cata lyt ic reduct ion
The display indicates if the Ad Blue level is low or
if there is a system malfunction.
AdBlue level low
You w il l be informed in the instrument cl uster
display if the Ad Blue in the tank drops below a
ce rtain level. Ad d at a minim um the amount of
AdBlue shown in the message: .,..

a co ...... N r--. N ...... 0
0
:E ' U Please refill with at least x qt (l) AdBlue/
DEF at the next refueling. Range x mi (km)
This message appears when there is only enough
Ad Blue left to drive the distance indicated in the
instr ument cluster. Fill the Ad Blue.
U Refill with at least x qt (I) Ad Blue/DEF. No
engine start in x mi (km). See owner's manual
This message appears when there is only enough
Ad Blue left to drive the distance indicated in the
instrument cluster. Fill the Ad Blue. Otherwise
the engine will not start again if you stop i t once
the distance indicated has been driven.
• Refill with at least x qt (I) Ad Blue/DEF. Un­
able to start engine. See owner's manual
This message appears when the AdBlue tank is
empty. Fill the AdBlue. Otherwise you will not be
ab le to start the engine again once yo u stop it .
The Ad Blue must be refilled when the amount in
the tank has reached the minimum level
c::, page 315, Preparation.
Incorrect filling/system malfunction
A message appears if the Ad Blue tank was filled
with a fluid other than AdBlue and the system
has detected that the tank was filled incorrectly,
or if there is a system malfunction .
II AdBlue/DEF: malfunction! No engine start
in x mi (km). See owner's manual
This message appears when it is only possible to
drive the distance indicated in the instrument
cluster . Drive to the nearest authorized Audi
dealer or authori zed Audi Service Facility to have
the ma lfunction corrected. Otherwise the engine
will not start again if you stop it once the dis­
tance indicated has been driven .
• AdBlue/DEF: malfunction! Unable to start
engine. See owner's manual
This message appears if the system has detected
that the tank was filled incorrectly or that there is a malfunction . Drive immediately to the near­
est authori zed Aud i dealer or authori zed Audi
Service Facility to have the malfunction correct ­
ed . Othe rwise you will not be able to start the en­
g ine again once you stop it.
Checking and Filling
Preparation
Applies to: veh icles w ith selective catalytic reduction
Fig . 258 Right rear s ide o f th e ve hicle: removing th e Ad B l­
u e cap
T he Ad Blue tank opening is located near the die­
sel tank opening. Add at least the amount of
AdBlue shown in the instrument cluster display.
This is the minimum amount required to ensure
the system detects the refilling and to start the engine. You can add a maximum of 6.3 gallons
(24 liters) .
Requirement: the request to add Ad Blue must
appear in the instrument cluster display.
.. Park the vehicle on a level surface.
.. Switch the ignit ion
off .
.. Open the tank filler door c::>poge 312.
.. Turn the tank filler neck cap to the left to re­
move
¢fig. 258.
.. Refill Ad Blue using a pump nozzle c::;, page 316,
a canister c;,page 316 or a bottle c;,page 317 .
A WARNING
f-
AdBlue can irritate the skin, eyes and respira-
tory system .
If there is contact with the fluid,
flush immed iately with plenty of water. Con­
sult a physician if necessary.
(D Note
-Only use Ad Blue that conforms to the
standard ISO 22241-1. Do not mix any addi­
ti ves with the Ad Blue and do not dilute it
w ith water.
- Do not add Ad Blue to the diesel tank or add
diesel fuel to the Ad Blue tank . Do not start
the engine under any circumstances if the
wrong fuel is filled in the ta nk. There is a
315

Check ing and F illing
risk of damaging the fuel tank system and
the engine. See an authorized Audi dealer or
a uthorized Audi Serv ice Facility for ass is ­
tance.
- AdB lue attacks surfaces such as painted ve ­
hicle components, plast ic and carpet. Re­
move the fluid as quickly as poss ible with a
damp cloth and plenty of cold water. If the
Ad Blue has already crysta llized, use warm
water and a sponge . AdBl ue residue that is
not removed will crysta llize a nd can damage
the affe cted surface.
- Do not sto re refi ll bott les o r caniste rs per­
mane ntly in the ve hicle. If the con ta iner
l e ak s, the escap ing Ad B lue could damage
the ve hicle in ter io r.
- Do not allow Ad Blue to come into co ntact
wi th clothing. If the re is contac t w ith the
f lui d, flus h immed iate ly w ith plenty o f wa ­
te r.
(D Tips
Follow t he Ad Blue m anufact urer's ins truc ­
t ions for use and s torage .
Refilling AdBlue using a pump
Applies to: vehicles with selective catalytic reduction
... Open the tank fi ller door ¢ page 312 , fig . 254.
... Turn the tank filler neck cap to the left to re ­
move
r=:> page 315, fig . 258 .
... Refill Ad B lue until the pump nozzle switches
off for the first time
r=:> 0 .
.,. Close the filler tube¢ page 317, Completing
AdBlue refill
(Qj) Note
- The pump nozzle handle must be pointing downwa rd w hen fill ing . Ot herwise the
p ump noz zle w ill not sw itch off a utomat i­
ca lly¢ @)
in Preparation on page 315.
-Do not cont inue fill ing once the pump no z­
zl e automatically switc hes off for the first
time. The AdBl ue tan k system could be
ove rfilled and leak A d Blue ¢(@ in
Prepara ­
tion on page 315 .
316
Refilling AdBlue using a canister
Applies to: vehicles with selective catalytic reduction
®
+®
Fig. 2 59 Caniste r w ith attac hable hose
... Remove the cover from the refill canister¢.&.
in Preparation on page 315, r=:>0 in Prepara­
tion on page 315 .
... Secu re the end of the hose (Don the ope ning in
the caniste r@ by tu rn ing the hose to the right .
.,. Remove the cap @from the other end of the
hose @ .
... Position the end of the hose @on the filler
neck in the ve hicle and turn the hose to the
r ight to tighten it .
... Lift the canister up and then tip it. Cont inue
holding the canister in a tipped position until it
is empty or unt il no more fluid flows into the
tank .
.,. Unsc rew the hose cou nterclockw ise .
.,. Remove the canister and close the filler t ube
r=:> page 317, Completing AdBlue refill.
{[» Note
Only use refill canisters that a re approved fo r
you r veh icle. Using o ther s ystems ca n cause
AdB lue to lea k.
© Tips
- An autho riz ed Aud i dea le r or aut ho rized
Audi repair f acili ty c an t ell you wh ich refill
c anis ters are app roved for yo ur vehicle .
- A per mitted refill ca niste r contains app roxi ­
m ate ly 1. 3 g allons (S lite rs) of Ad Blu e.

Cl a:, ...... N
" N ...... 0
0
::r ' Refilling AdBlue using a bottle
Applies to: vehicles with selective catalytic reduction
.,. Remove the cap from the refill bottle ¢&, in
Preparation on page 315,
¢ @ in Preparation
on page 315.
.,. Position the bottle on the filler tube and turn
the bottle clockwise unti l it stops turning .
.,. Press lightly against the bottom of the bottle
to empty it. Continue pressing the bottom of
the bottle until it is empty or until fluid stops
flowing into the tank .
.,. Turn the bottle to the left without press ing on
the bottom .
.,. Remove the bottle and seal the filler neck
¢ page 317, Completing AdBlue refill .
({D Note
Onl y use refi ll bottles t hat are approved for
your veh icle. Using othe r systems can ca use
Ad Blue to leak.
(j) Tips
- You can obta in refi ll bottles from an autho r­
iz ed Audi dealer or author ized Audi Se rvice
Fac ility.
- A pe rm itted refill bott le conta ins approx i­
ma tely O.S gallons ( 1.9 lite rs) of Ad B lue.
Completing AdBlue refill
Applies to: vehicles with selective catalytic reduction
Closing th e fill er n eck
.,. Turn the Ad Blue cap to t he r igh t on the filler
tube unti l the cap clic ks into p lace ¢
A in
Preparation on page 315,
¢ @ in Pr eparation
on page 315 .
.,. Close the fuel filler door and then press on the
left side until it lat ches.
After filling
The vehicle must be driven so that the system
r e cognizes that the Ad Blue was refilled. This can
take sev era l minutes .
.,. If there was no Ad Blue left in the t ank and a
range of O mi (0 km) was shown in the display,
switch the ignition on for about 30 seconds be ­
fore starting the engine .
Check ing and F illing
(D Tips
Ad B lue in the tank can freeze at very low tem ­
peratures . If thi s happens, the system will
not detect that the Ad Blue was refilled and it
will continue to inform you of the low Ad B lue
l evel. The message turns off as soon as the
ta nk thaws out aga in .
Emissions control
systems
Catalytic converter
Applies to: vehicles with gasoline engines
T he veh icle may only be d riven w ith un leaded
gasol ine , otherwise the cata lyti c converte r will be
dest royed.
Never dr ive u ntil the ta nk is completely empty .
T he ir regu lar supply of fuel that resu lts from that
can cause eng ine misfires. Uncomb usted fue l will
en ter the exha ust system , which can cause over­
heating and damage to the cata lytic converter.
Di esel particulate filt er
Applies to: vehicles with diesel particulate filter
T he diesel part iculate filte r filte rs nearly all of
the soot pa rt icles out of the exhaus t. The filter
cleans itself a utomat ica lly unde r no rma l dr iving
cond it io ns. If the fi lter canno t be cleaned auto­
matically, for examp le if only s ho rt distances are
u su a lly driven, t he fi lter will become clogged
with soot.
Indicator light (diesel particulate filter )
Applies to: vehicles with diesel particulate filter
II Particulate filter: cl ean by driving . See own­
er 's manual
The diesel part icu late filter requ ires regenera­
t ion. To support the filter's self-cleaning func­
t ion:
Drive for approximately 15 minutes at 37 mph
(60 km/h) or above in the "S" selecto r leve r pos i­
t ion. Keep the engine speed at a minim um of
2,000 RPM . The temperat ure increase that will
r esul t from this ca n bu rn off the soot in the filter.
T he ind icator light will turn off when the cleaning
has completed successfully . .,.
317

Checking and Filling
If the indicator light does not turn off, drive im­
mediately to an authorized Audi dea ler or author­
ized Audi Service Fac ility to have the malfunction
corrected.
A WARNING
The temperature of the exhaust system is
high, both whe n driving and after stopping
the engine .
- Never touch the exhaust ta il pipes once they
have become hot. This could result in burns .
- Do not park you r vehicle over flammable
materials such as g rass or leaves because
the h igh temperat ure of the emiss ions con­
t rol sys tem cou ld start a f ire.
- Do not apply underbody p rotectant in the
exha ust system a rea, because this increases
the risk of fire.
- Applies to: vehicles wi th diesel particulate
filte r: always adjus t your speed to the
weathe r, road, te rra in and traffic con ditio ns
dur ing diesel partic ulate fi lter regene ration.
Yo u should never disobey tra ffic laws in or­
der to fo llow dr iv ing recommendations.
(D Tips
Applies to: ve hicles with diesel particulate filter
- Due to the high temperatures that occur
d uring diesel pa rticu late filter regenerat ion,
the radiator fan may continue runn ing after
the engine stops, even if the engine did not reach its operat ing temperatu re.
- Noises, odors and increased speeds may oc­
cur d uring the regeneration.
- Always use the co rrect engine oil and fuel to
ens ure that the serv ice life of the d iesel par­
ticulate filter is not reduced.
318
On Board Diagnostic
System (OBD)
The On-Board Diagnostic System monitors the
engine and transmission components that influ­
ence emissions.
Fig. 260 Footwe ll on left s ide of t he ve hicle : con necti on
port fo r the O n-Boa rd D iagnostic Sys tem (OBD)
On -Board Diagnostic System
Engine data can be read out a t the On-Board Di­
agnost ic System connection port using a specia l
testing device
c::> fig. 260 .
Indicator light
If thP ¢'4 ind icator light blink s or turns on , the re
i s a ma lfunction that is causing poor emissions
quality a nd that cou ld damage the catalytic con­
verter .
D rive slowly to an authorized Audi dealer or au­
thorized Audi Serv ice Facility to have the mal­
funct ion corrected .
The ind icator light can a lso turn on if the fuel fill­
er cap is not closed correctly
c::> page 312 .
A WARNING
Incorrect use of the co nnect ion port for the
On-Board D iagnost ic System can cause mal­
f u nct ions, wh ich can t hen resul t in accidents
and se rious inj uries.
- Only allow an a utho rized Aud i dea le r or au­
thorized A udi Se rvice Fa cility to read out the
e ngine da ta.
-