2019 AUDI A4 check engine light

8W0012721BG
CheckingandFilling

oilchangedby anauthorizedAudidealeror au-
thorizedAudiServiceFacilityisrecommended.
Ifyouchangetheengineoilyourself,pleasenote
thefollowingimportantinformation:

ZA\WARNING
Ifyouchangetheengineoilonthevehicle
yourself,thefollowingprecautionsmustbe
followed:
—Wearprotectiveeyewear.
—Duetotheriskofscalding,allowtheengine
to cooldownsufficiently.
—Maintainenoughdistancewhenyouarere-
movingtheoildrainplug.Whiledoingthis,
keep yourforearmparalleltothegroundto
reducetheriskofhotoildrippingdownyour
arm.
—Draintheoilintoacontainerdesignedfor
thispurposethatislargeenoughtoholdthe
fullamountofoilinyourengine.
—Engineoilispoisonous.Alwaysstoreoutof
reachofchildren.
—Prolongedcontactofusedengineoilwith
theskinmaycauseskindamage.Always
washoiloffimmediatelywithsoapand wa-
tertoprotectyourskin.

@®)Note
Donotmixanyadditiveswiththeengineoil.
Additivesmaycauseengine damagethatis
notcoveredbyyourNewVehicleLimitedWar-
ranty.
@Forthesakeoftheenvironment
—Beforechangingtheengineoil,makesure
youcandisposeoftheusedengineoilcor-
rectly.
—Engineoilmustalways bedisposedofcor-
rectly.Donot dumpitintheyard,inthefor-
est,orinopenwater,riverchannels,orsew-
ers.
—Haveyour usedengineoilrecycledbybring-
ingittoausedoilcollectionsiteorcontact
agasstation.
Coolingsystem
Theenginecoolingsystemisfilledwithamixture
ofpurifiedwaterandcoolantadditiveatthefac-
tory.Thiscoolantmustnotbenotchanged.
ThecoolantlevelismonitoredthroughtheBin-
dicatorlight>page22.However,occasionally
checkingthecoolantlevelmanuallyisrecom-
mended.
Ifyoumustaddcoolant,useamixtureofwater
andcoolantadditive.Mixing thecoolantadditive
withdistilledwaterisrecommended.
Coolantadditive
Thecoolantadditiveismadeofanti-freezingand
corrosionprotectionagents.Onlyuse thefollow-
ingcoolantadditives.Theseadditivesmaybe
mixedwitheachother.

CoolantadditiveSpecification
G12++TL774G
G131TL774]




Theamountofcoolantadditivethatneedstobe
mixedwithwaterdependsontheclimatewhere
thevehiclewillbeoperated.Ifthecoolantaddi-
tivepercentageistoolow,thecoolantcanfreeze
anddamagetheengine.

CoolantFreezeprotec-
additivetion
Warmmin.40%min.-13°F
regionsmax.45%(-25°C)
Cold min.50%max.-40°F
regionsmax.55%(-40°C)


C@)Note
—Beforethestartofwinter,haveanauthor-
izedAudidealerorauthorizedAudiService
Facilitycheckifthecoolantadditiveinyour
vehiclematchesthepercentageappropriate
fortheclimate.Thisisespeciallyimportant
whendrivingincolderclimates.
—Iftheappropriatecoolantadditiveisnot
availableinanemergency,donotadd any
otheradditive.Youcoulddamagethe
315

CheckingandFilling

engine.Ifthishappens,onlyusewaterand
restorethecorrectmixtureratiowiththe
specifiedcoolantadditiveassoonaspossi-
ble.
—Onlyrefillwithnewcoolant.
—Radiatorsealantmustnot bemixedwith
thecoolant.
Addingcoolant

©=FeRAZ-0540


MIN

Fig.258Enginecompartment-coolantexpansiontank
(diagram):@coverwithreleasebutton;2)markings
Observethesafetyprecautions>page309,
Workingintheenginecompartment.
Checkingtheenginecoolantlevel
>Parkthevehicleonalevelsurface.
>Switchtheignitionoff.
>Readthecoolantlevelonthecoolantexpansion
tank>page311,fig.256.Thecoolantlevel
mustbebetweenthemarkings@)>fig.258
whentheengineiscold.Whentheengineis
warmitcanbeslightlyabovetheupper mark-
ing.
Addingcoolant
>Allowtheenginetocool.
> Placealarge,thicktowelonthecoolantexpan-
siontankcover.
>Pushthereleasebutton(@)9fig.258onthe
capandcarefullyturnittotheleftuntilyou
feelresistance>/\.
>Pushthereleasebuttonagainandremovethe
capcompletely.
>Makesurethatthefluidlevelremainsstable.
Add morecoolantifnecessary.
>
Turn thecaptotherighttotightenituntilyou
feelresistanceasecondtime.
316
Coolantlossusuallyindicatesthatthereisaleak.
Immediatelydriveyourvehicletoanauthorized
AudidealerorauthorizedAudiServiceFacility
andhavethecoolingsysteminspected.Ifthe
coolingsystemisnotleaking,coolantlosscanre-
sultfromthecoolantboilingdueoverheating
andthenbeingforcedoutofthecoolingsystem.

ZA\WARNING
— Theenginecompartmentinanyvehiclecan
beadangerousarea.Stoptheengineandal-
lowitto coolbeforeworkingintheengine
compartment.Alwaysfollowtheinforma-
tionfoundin>page309,Workinginthe
enginecompartment.
—Neveropenthehoodifyoucan seeorhear
steamorcoolantescapingfromtheengine
compartment.Thisincreasestheriskof
burns.Thecoolingsystemisunderpressure.
Whenyounolongerseeorhearsteamor
coolantescaping,youmayopentheengine
compartmentwithcaution.
—Whenworkingintheenginecompartment,
rememberthattheradiatorfancanswitch
oneveniftheignitionisswitchedoff,which
increasestheriskofinjury.
—Coolantadditiveandcoolantcan bedanger-
oustoyourhealth.Forthisreason, storethe
coolantintheoriginalcontainerandaway
fromchildren.Thereisariskofpoisoning.

@)Note
Donotaddcoolantiftheexpansiontankis
empty.Theremaybe airinthecoolingsys-
tem,whichincreasestheriskofenginedam-
age.Ifthisisthecase,donotcontinuedriv-
ing.SeeanauthorizedAudidealerorauthor-
izedAudiServiceFacilityforassistance.

8W0012721BG
CheckingandFilling

Brakefluid
B8K-2122



Fig.259Enginecompartment:caponbrakefluidreservoir
Observethesafetyprecautions>A\inWorking
intheenginecompartmentonpage309.
Checkingthebrakefluidlevel
>Readthebrakefluidlevelonthebrakefluidres-
ervoir>page311,fig.256.Thebrakefluidlev-
elmustbebetweentheMINandMAXmarkings
>A.
Thebrakefluidlevelismonitoredautomatically.
Changingthebrakefluid
Brakefluidshouldbechangedatregularinter-
vals.Havethebrakefluidchangedby anauthor-
izedAudidealerorauthorizedAudiServiceFacili-
ty.TheauthorizedAudidealerorauthorizedAudi
ServiceFacilitywillinformyouofthereplace-
mentintervals.

ZAWARNING
—IfthebrakefluidlevelisbelowtheMIN
marking,itcanimpair thebrakingeffectand
drivingsafety,whichincreasetheriskofan
accident.Donotcontinuedriving.Seeanau-
thorizedAudidealerorauthorizedAudi
ServiceFacilityforassistance.
—Ifthebrakefluidisold,bubblesmayformin
thebrakesystemduringheavybraking.This
couldimpairbrakingperformanceanddriv-
ingsafety,whichincreasestheriskofanac-
cident.
— Thebrakefluidinyourvehiclemustmeet
thestandardVW50114andisavailableat
anauthorizedAudidealerorauthorizedAu-
diServiceFacility.Ifthisbrakefluidisnot
available,anotherhigh-gradebrakefluidof


equivalentqualitymaybeused,anditmust
meettheU.S.FederalMotorVehicleStand-
ard(FMVSS)116DOT4,Class6.
Q)Note
—IfthebrakefluidlevelisabovetheMAX
marking,brakefluidmayleakoutoverthe
edgeofthereservoirandresultindamage
tothevehicle.
—Donotallowanybrakefluidto comeinto
contactwiththevehiclepaint,becauseit
willcorrodethepaint.

Electricalsystem
Ifthe=orflindicatorlightturnson,thereisa
malfunctioninthegenerator,thebattery, orthe
vehicleelectricalsystem.
=Electricalsystem:malfunction!Safelystop
vehicle
Donotcontinuedrivingandswitchtheengineoff
=>AX.SeeanauthorizedAudidealerorauthorized
AudiServiceFacilityforassistance.
[HlElectricalsystem:malfunction!Restartnot
possible.PleasecontactService
Itwillnot bepossibletorestarttheengineonce
youturnitoff.Vehiclefunctions/drivingstability
maybelimited.DrivetoanauthorizedAudideal-
erorauthorizedAudiServiceFacilityimmediate-
ly.
z=Electricalsystem:malfunction!Pleasecon-
tactService
Switchoffallelectricalequipmentthatisnot
needed.Vehiclefunctions/drivingstabilitymay
belimited.DrivetoanauthorizedAudidealeror
authorizedAudiServiceFacilityimmediately.
z=Electricalsystem:lowbatterycharge.Bat-
tery
willbechargedwhiledriving
Thestartingabilitymaybeimpaired.
Ifthismessageturnsoffafteralittlewhile,the
vehiclebatteryhaschargedenoughwhiledriving.>
317

CheckingandFilling

Ifthismessagedoesnotturnoff,driveimmedi-
atelytoanauthorizedAudidealerorauthorized
AudiServiceFacility.

ZA\WARNING
Whenthereisanelectricalsystemmalfunc-
tion,vehiclefunctionsmaynotworkanddriv-
ingstabilitymaybelimited,whichincreases
theriskofanaccident.Stopdrivingand
switchtheengineoff.SeeanauthorizedAudi
dealerorauthorizedAudiServiceFacilityfor
assistance.

Battery
Prlaameeeelec)
Becauseofthecomplexpowersupply,allworkon
batteriessuchasdisconnecting,replacing,etc.,
should only beperformedby anauthorizedAudi
dealerorauthorizedAudiServiceFacility>A\.
Multiplebatterieswithdifferenttechnologies
maybeinstalledinyourvehicle:
—Vehiclebattery(forexample,forstartingthe
engine,basicpowersupply)>page319,Lead
batteryor>page319,Otherbatterytypes
—Auxiliarybattery(forexample,forrecuperation
oroptionalequipment)>page319,Otherbat-
terytypes
Notrunningthevehicleforlongperiodsof
time
Thebatterywillgraduallydrainifthevehicle
doesnotrunforlongperiodsoftime.Toensure
thatthevehiclecanstillbestarted,theelectrical
equipmentwillbereducedorswitchedoff
=>page143.Someconveniencefunctions,such
asinteriorlightingorpowerseatadjustment,
maynotbeavailableundercertaincircumstan-
ces.Theseconveniencefunctionswillbeavailable
againonceyouswitchtheignitiononandstart
theengine.
Evenwhenelectricalequipmentisswitchedoff,
theequipmentcanstilldrainthebatteryifthe
vehicleisnotdrivenforlongperiodsoftime.
Deepdrainingresultsinachemicalreactionthat
destroys
theinsideofthebattery.Thebattery
318
mustbechargedeverymonthtopreventthis
=page319.Contact anauthorizedAudidealeror
authorizedAudiServiceFacilityformoreinfor-
mation.
Winteroperation
Coldweatherplaceshigherdemandsonthebat-
tery.Thisresultsinreducedstartingability.Have
thebatterycheckedbyanauthorizedAudidealer
orauthorizedAudiServiceFacilitybeforecold
weatherbegins.

Z\WARNING
—Allworkonthebatteryorelectricalsystem
inyourvehiclecanresultininjuries,chemi-
calburns,accidents,or burns.Becauseof
this,allworkmustbeperformedonlybyan
authorizedAudidealerorauthorizedAudi
ServiceFacility.
—Neverconnectthechargingcableorjump
startcabledirectlytoyourvehiclebattery.
Onlyusethe connectionsintheenginecom-
partment>page319.

ZAWARNING
CaliforniaProposition65Warning:
—Batteryposts,terminalsandrelatedacces-
soriescontainleadandleadcompounds,
chemicalsknowntotheStateofCalifornia
tocausecancerandreproductiveproblems.
Washhandsafterhandling.
()Note
—Ifthevehiclewillbe parkedforlongperiods
oftime,protectthebatteryagainstthecold
so thatitwillnot be destroyed by“freezing”
=page319,Chargingthebattery.
—Thereareelectricalcomponentsunderthe
cargofloorbehindatrimpanelthatwarm
upduringoperation.To reducetheriskof
thecomponentsoverheating, donotstore
objectssuchasblanketsunderthecargo
floor.Ifthecomponentsoverheat,theywill
switchofftemporarily.Thiswillbeindicated
byamessagethatwillbedisplayedinthe
instrumentclusteruntilthetemperaturere-
turnstonormal.

CheckingandFilling

>Attheendofthechargingprocess,switchthe
chargeroffandpullthepowercableoutofthe
socket.
>Removethechargingdeviceterminalclamps.
>Closetheredcoveronthepositiveterminal.
>Closethehood>page310.

ZXWARNING
—Neverconnectthechargingcabledirectlyto
yourvehiclebattery.Onlyuse the connec-
tionsintheenginecompartment
=>page319.
—Ahighlyexplosivemixtureofgasescanform
whenchargingbatteries.Onlychargethe
batteryinwell-ventilatedareas.
—Adrainedbatterycanfreezeattempera-
turesaround329F(02C).Donotchargeor
useafrozenorthawedbattery.If iceforms,
thebatteryhousingcancrackandbattery
electrolytecanleakout,whichincreasesthe
riskofanexplosionandchemicalburns.
Contact anauthorizedAudidealerorauthor-
izedAudiServiceFacilityformoreinforma-
tion.
—Donotconnectordisconnectthecharging
cablewhilechargingbecausethisincreases
theriskofanexplosion.

@)Tips
Readallofthemanufacturer'sinstructions
forthechargerbeforechargingthebattery.
Windshieldwasher
system

B8W-0125



Fig.261Enginecompartment:washerfluidreservoircap
ThewindshieldwasherfluidreservoirScontains
thecleaningsolutionforthewindshieldandthe
320
headlightwashersystem*>page311,fig.256.
Thereservoircapacitycanbefoundin
=>page373.
Toreducetheriskoflimescaledepositsonthe
spraynozzles,usecleanwaterwithlowamounts
ofcalcium.Alwaysaddwindowcleanertothewa-
ter.Whentheoutsidetemperaturesarecold,an
anti-freezingagentshould beaddedtothewater
sothatitdoesnotfreeze.
C)Note
— Theconcentrationofanti-freezingagent
mustbeadjustedtothevehicleoperating
conditionsandtheclimate.Aconcentration
thatistoohighcanleadtovehicledamage.
—Neveraddradiatoranti-freezeorotheraddi-
tivestothewasherfluid.
—Donotuseaglasscleanerthat contains
paintsolvents,becausethiscoulddamage
thepaint.
Serviceintervaldisplay
Theserviceintervaldisplaydetectswhenyourve-
hicleisdueforservice.
Checkingserviceintervals
Youcan checktheremainingdistanceortimeun-
tilthenextoilchangeornextinspectioninthe
Infotainmentsystem.

>SelectintheInfotainmentsystem:the[MENU
button>Vehicle>leftcontrolbutton>Service
&checks>Serviceintervals.

Resettingtheindicator
AnauthorizedAudidealerorauthorizedAudi
ServiceFacilitywillresettheserviceintervaldis-
playafterperformingservice.
Ifyouhavechangedtheoilyourself,youmustre-
settheoilchangeinterval.

>SelectintheInfotainmentsystem:the|MENU
button>Vehicle>leftcontrolbutton>Service
&checks>Serviceintervals>Resetoilchange
interval.

Emergencysituations

Emergencysituations
General
Thischapterisintendedfortrainedemergency
crewsandworkingpersonnelwhohavethenec-
essarytoolsandequipmenttoperformthese
operations.
Startingbypushingor
towing
@)Note
Vehicleswithanautomatictransmission
cannotbestartedbypushingortowing.
Startingwithjumper
cables
Ifnecessary,theenginecanbestartedbycon-
nectingittothebatteryofanothervehicle.
Iftheengineshouldfailtostartbecauseofadis-
chargedorweakbattery,thebatterycanbecon-
nectedtothebatteryofanothervehicle,usinga
pairofjumpercablestostarttheengine.
Jumpercables
Useonlyjumpercablesofsufficientlylargecross
sectiontocarrythestartercurrentsafely.Refer
tothemanufacturer'sspecifications.
Useonlyjumpercableswithinsulatedterminal
clampswhicharedistinctlymarked:
plus(+)cableinmostcasescoloredred
minus(-)cableinmostcasescoloredblack.


creasestheriskofanexplosionandchemi-
calburns.Afterjumpstartingthevehicle,
drivetoanauthorizedAudidealerorauthor-
izedAudiServiceFacilityimmediatelyto
havethevehiclebatterychecked.
—Donotallowbatteryacidtocontacteyesor
skin.Flushanycontactedareawithwater
immediately.
—Improperuseofaboosterbatterytostarta
vehiclemaycause anexplosion.
—Vehiclebatteriesgenerateexplosivegases.
Keepsparks,flameandlightedcigarettes
awayfrombatteries.
—Donottrytojumpstartanyvehiclewitha
lowacidlevelinthebattery.
— Thevoltageoftheboosterbatterymustalso
havea12-Voltrating.Thecapacity(Ah)of
the boosterbatteryshouldnotbelower
thanthatofthedischargedbattery.Useof
batteriesofdifferentvoltageorsubstantial-
lydifferent“Ah”ratingmaycause anexplo-
sionandpersonalinjury.
—Neverchargeafrozenbattery.Gastrapped
intheicemaycause anexplosion.
—Neverchargeoruseabatterythathasbeen
frozen.Thebatterycasemayhave beweak-
ened.
—Useofbatteriesofdifferentvoltageorsub-
stantiallydifferentcapacity(Ah)ratingmay
causeanexplosionandinjury.Thecapacity
(Ah)oftheboosterbatteryshouldnot be
lowerthanthatofthedischargedbattery.
—Beforeyoucheckanythingintheengine
compartment,alwaysreadandheedall
WARNINGS&page309.


Z\WARNING
Batteriescontainelectricity,acid,andgas.
Anyofthese cancauseveryseriousorfatalin-
jury.Followtheinstructionsbelowforsafe
handlingofyourvehicle’sbattery.
—Alwaysshieldyoureyesandavoidleaning
overthebatterywheneverpossible.
—Adeadbatterycanfreezeattemperatures
around
32°F(0°C).Ifthevehiclebatteryis
frozen,youmustthawitbeforeconnecting
thejumpstartcables.Ifyoudonot,thisin-

362
C)Note
—Applyingahighervoltageboosterbattery
willcauseexpensivedamagetosensitive
electroniccomponents,suchascontrol
units,relays,radio,etc.
—Theremustbe noelectricalcontactbetween
thevehiclesasotherwisecurrentcouldal-
readystarttoflowassoonasthepositive
(+)terminalsareconnected.

Index

Electromechanicalsteering..............142
ElectronicimmobiliZetisivie.¢veeavaie6 6oes29
ElectronicStabilizationControl(ESC)
refertoESC..........2.0ceeeeee138,139
EmbeddedSIMseard«esswiisi xsosowevossoeinewo0186
Emergencyassistance..........20000005348
Emergencybrakingfunction..............82
EMergencyCallusseas« =eemw Emergencyflashers.........seseeeeeneee49
Emergencyoperation
DOOMS«caw «aereueeeesesecepeeae33
Fuelifillerdoorion=cvssioewe»anausaewosussentsaaxe308
Luggagecompartmentlid...............39
Panoramicglassroof..............00-0543
Sliding/tiltingSUNMTOOFsce.soseasaiesoernx42
Emergency'starting)s«eceassisco<6mene6s362
Emissionscontrolsystems...........4..308
EnergyManagement’:«casxsasea Engine
Breakingin«escseesisoeenewssoomens6 @ow76
Coolant.................0000.2eeee315
Start/Stop'systeMwane+ ¢sreea xeaeyseae80
Starting/Stopping’s« «se.2eeeseeeonos78
Startingwithjumpercables............362
Enginecompartment
Opening andclosingthehood..........310
OVERVIEWsorsx xaeus3 2eee5oewesceee311
Safetyprecautions:.«ves«+sceaoavsea«0309
Engineoil
Adding...........0ceeececeeeeee312
CHANGING:« =snes¢ saeoHceGeoFEeee314
CheckingoiLleveli:soscsisecue swamae312
Consumption...........000ese eeeeee312
Indicatorlight...........-...0.-0000312
Replacementinterval.................320
Temperaturedisplay.................0-20
EngineSOUNG«sissiesssswine3 6aenvaveswarenine6126
EngineStart/Stopmode
refertoStart/Stopsystem...........80,81
Enginestop
refertoStart/Stopsystem...........80,81
EnhancedvieW........0.00cenceeeeeee7
Enteringcharacters/numbers(speller).....152
Enteringletters(speller)................152
Entertainmentslidingmenu.............150
Entry/exitlighting).©.ese62ewwseerwesoe49
378
Environment
Unleadedgasoline.................00.305
AS)Cl138
Hilldescentassist.................00.140
OffroadMode:«wiv:=osewsseweeseey139
Sportmode.......ceeeeeeeeeeeee139
eSIM
refertoEmbeddedSIMcard............186
Evasive steeringsupport................114
EventDataRecorder(EDR)«wens«scene«2143
ExteriorLiQhtingisc:«acris© acvenere+ocevene©«one47
ExteriorMURPOKSsein2 vwees2 6som©wennwo51
Foldingsettings...............-.00000533
Externalvoiceoperation................169
F
Factorydefaultsettings
MultiMediaInterface.................241
Fader(Sound).........00seceeeeeeeee 244
Fastening
Boosterseats...........0..0..0.0000.294
Convertiblechildsafetyseats...........293
Infantseats......0.02.eeeeeeeee291
Fastforwardingandrewinding(audio/video
file)eee229
Fastforwarding(audio/videofile).........229
FaStinoutes«xaceusx 2emeneusaoome2 6stems©eee205
Favorites
Media......cecececeeeeeeeens232
NaViGatiOniscs:+wes& +see§=seme& 5es200
Telephonewrssicsxcaveovmaseroorenee6voce178
FederalCommunicationsCommission(FCC).370
Fileformats(mediadrives)..............235
FLOORTHatS::=ems< =seessoweescseee:we252
Footpedals...........2.0.0eee eeeeeeee252
Forthesakeoftheenvironment
DisposingOfengineOibwwsx«eesssawe314
FUeUINGsassoasxnsenex asonueneooevacens4 wcoaeern6ove306
Leaks...2...eeeeeeeee310
Warminguptheengine..............64.78
FreetextSCQrehacs& xeames¥aeroxHams5154
Mediates=«sea¢screeswomeoeeeeosee231
NaViGatiOMseness«ccstioss6 +wcacweswesieneiewveneiene198
Radio...2...eeeeeeeeeeeee216
Telephoneessess &seemssxcainvveeveeaexe182