2013 AUDI A4 check engine

-Always wear eye protection. Do not let
battery acid or any lead particles get on
your skin or clothing. Shield your eyes .
Explosive gases can cause blindness or
other injury.
- Battery acid contains sulfuric acid . Sulfu­
ric acid can cause blindness and severe
burns.
- Always wear gloves and eye protection.
Do not tilt the battery because acid
could leak out of the ventilation open­
ings.
- If you get battery acid in your eyes or
on your skin, immediately rinse with
cold water for several minutes and get
medical attention .
- If you should ingest any battery acid,
seek medical attention immediately.
- Do not expose the battery to an open
flame, electric sparks or an open light.
- Do not smoke.
- Do not interchange the positive and neg-
ative cables .
= When working on the battery, be sure
not to short-circuit the terminals with
tools or other metal objects. This would cause the battery to heat up very quickly,
which could lead to damage or explosion and personal injury.
- When a battery is charged, it produces
hydrogen gas which is explosive and
could cause personal injury .
- Always keep the battery well out of the
reach of children.
- Before work is done on the electrical sys­
tem, disconnect the negative ground ca­ ble .
- Before performing any work on the elec­
trical system, switch off the engine and
ignition as well as any electrical equip ­
ment. The negative cable on the battery
must be disconnected . If you are just go­
ing to replace a light bulb, then it is
enough to switch off the lights.
- Before disconnecting the battery, switch
off the anti-theft alarm system! Other­
wise you will set off the alarm.
Checking and filling 231
-When disconnecting the battery, first
disconnect the negative cable and then
the positive cable.
- Before reconnecting the battery, make
sure all electrical consumers are switch­
ed off. Reconnect the positive cable first
and then the negative cable . Never inter ­
change the cables -this could start a fire!
- Never charge a frozen or a thawed-out
battery . It could explode! If a battery has
frozen , then it must be replaced . A dis­
charged battery can freeze over at 32°F
(QOC),
-Make sure the vent hose is always attach­
ed to the opening on the side of the bat­
tery .
- Never use batteries which are damaged.
There is the danger of an explosion! Al­
ways replace a damaged battery.
&_ WARNING
California Proposition 65 Warning:
- Battery posts, terminals and related ac­
cessories contain lead and lead com­
pounds, chemicals known to the State of
California to cause cancer and reproduc­
tive problems. Wash hands after han­ dling.
(D Note
- Do not disconnect the vehicle battery
when the ignition is switched on or when the engine is running, otherwise, you will
damage electronic components in the
electrical system.
- If your vehicle is going to stand for a
long period of time without being driven,
protect the battery from "freezing", oth­
erwise it will be damaged and will then
have to be replaced.
•
•

232 Checking and filling
Battery charging
Starting the engine requires a well charged
battery.
Fi g. 1 89 Engine co mpart ment: C onn ecto rs fo r charger
and jumper cab les
Always read and heed all WARNINGS be low
c:> A and c:> A in Working on the battery on
page 230 .
.,. Turn off the ignit ion and a ll electrical con­
sumers.
.,. Make sure the area is well venti lated when
you cha rge the battery .
.,. Open the engine hood
r:::.> page 219 .
.,. Open the cover on the pos it ive pole
<::.> fig . 189 .
.,. Co nne ct the charger c onnec tors a ccord ing
to the instructions to the
jump start bolts.
(Bo lts under the cover = "positive" , Bolts
with hex head= "negative") .
.. Only now pl ug the mains lead for the charg­
ing equipment into the wall outlet a nd turn
i ton
c:> &_ .
.,. Mak e sure the charging rate is not over
30 amp s/14 .8 Volt .
.,. When the ba tte ry is f ully charged: Turn the
c h arging e quipment o ff and
remove t h e
m ain s le ad from the w all outle t.
.,. Now remove the clam ps for the charging
equipment.
.,. Close the cover on the pos it ive po le .
.. Close the hood
c:> page 219 .
A discharged battery can freeze at tempera­
tures of on ly 32 ° F (0 °C). A llow a frozen bat­
tery to thaw completely before attempt ing to
charge it
c:> .& . However, we recommend not
usi ng a thawed battery again because the bat- tery casing can be cracked due to ice forma
­
t ion an d can leak battery acid.
Battery charging (Maximum charging rate
of 30 amps/14.8 Volt)
W hen charging at low vo ltages (e.g. wi th a
trickle charger ), the battery cables do not
have to be disconnected f irst . The battery
caps should
not be opened when charging a
battery.
It i s not necessa ry to remove the battery from
the luggage compartment.
Fast charging the battery (charging rate
abov e 14 .8 Volts)
F or technica l reasons do not use a battery
c h arger that uses voltage greater than 14.8
Volts to c harge yo ur vehicle's battery.
A WARNING
-----=--
Charging a battery can be dangero us .
- Always follow the operating instructions
provided by the battery cha rger manu­
factur er when charg ing your battery .
- Never charge a frozen battery. It may ex­
p lode because of gas trapped in the ice .
Allow a frozen batte ry to thaw out first.
- Do not reuse batteries w hich were fro­
ze n. The battery hous ing may have
cracked and weakened when the battery
froze.
- Cha rge the battery in a well ventilated
a rea . Keep away from open flame or elec­
tr ica l spar k. Do not smoke. Hy drog en gas
genera ted by t he battery is e xplos ive .
- To reduc e the danger of explosion,
neve r
connec t or d isconnect c harger cab les
while the charge r is ope rat ing .
- Fast c ha rging a ba tte ry is dange rous and
should o nly be attempte d by a compe­
t en t tech nician wi th the p rope r equip­
m en t.
- Batt ery acid tha t m ay sp ill dur ing c ha rg­
i n g should be w ashe d off with a s olu tion
o f w arm water a nd baking so da to neu-
tralize the a cid. ....
L..__ _____________ _J ...

(D Note
Never use a fast charger as a booster to
start the engine . This will seriously dam­
age sensitive electronic components, such
as control units, relays, radio, etc ., as well
as the battery charger .
Battery replacement
The new battery mu st have the same specifi­
cations and dimensions as the original equip­
ment battery .
Intelligent energy management in your vehi­
cle is responsible for d istributing the electr i­
cal energy throughout your vehicle
c::>
page 192. The intelligent energy manage­
ment system w ill keep the engine battery
charged bette r then vehicles w ithout t his sys­
tem. To make sure the additional electr ica l en­
ergy is available once again after you have
changed the battery, we recommend that you
install batteries of the same type and manu­
facture only (the same as those installed at
the time your vehicle was delivered). Specifi­
cations are listed on the bat tery hous ing. Your
author ized Audi dealer must code the battery
in the energy management system to enable
you to use the energy management functions
correctly after replac ing the battery .
If it is not possible to use a battery of this
type, the new battery must have the same ca­
pac ity, voltage (12-volts), amperage, con­
struction and plug sea ling.
When insta lling the battery, make sure the ig ­
nition and all electr ical consumers are turned
off.
(D Note
Make sure the venti lation hose on the s ide
of the battery is connected , othe rwise
fumes or battery ac id can leak out .
@ For the sake of the environment
Because of the problem of proper d isposal
of a battery, we recommend your author­
ized Aud i dealer change the battery for
Checkin g and fillin g 233
you. Batteries contain sul fur ic acid and
l ead and must always be disposed of prop­
erly in comp liance with a ll environmental
regulations. Disposing of vehicle batter ies
i mproperly is very dangerous to the envi­
ronment .
Windshield/headlight*
washer container
Fig. 190 En gin e compart men t: Cove r on the w ind­
s hi eld an d headligh t* was her fl uid conta iner
The washer fluid container is marked w ith the
symbol
Q on its cap c::>fig. 190, c::>page 221,
fig. 184 .
.,. Before you check anything in the engine
compa rtment,
always read and heed all
WARNINGS
c::> .&. in Working in the engine
compartment on page 219.
.,. Lift the f iller cap tongue to add washer flu­
id. You can fi ll the container to the top .
.. Press the cap back onto the fi ller neck after
filling the container .
You can find the reservoir
capacity in the table
in c::>
page 2 77 .
Clean water should be used when filling up.
If
possib le, use soft water to prevent scaling on
the washer jets . Always add a glass cleaner
solution (with frost protection in the winter) .
(D Note
Do not mix engine coolant antifreeze or
any other additives to fill up the wind­
shield washer reservoir .
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•

Emergency situations
General
This chapter is intended for trained emer­
gency crews and working personnel who
have the necessary tools and equipment to
perform these operations.
Starting by pushing or
towing
(D 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
connecting it to the battery of another vehi­
cle.
If the engine should fail to start because of a
discharged or weak battery, the battery can be
connected to the battery of
another vehicle,
using a
pair of jumper cables to start the en­
g ine.
Jumper cables
Use only jumper cables of sufficiently
largecross section to carry the starter current
safe ly. Refer to the manufacturer's specifica­
tions.
Use only jumper cables with
insulated termi­
na l 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
injury. Follow the instructions below for
safe handling of your vehicle's battery.
- Always shield your eyes and avoid lean­
ing over the battery whenever possible.
Emergency situations 269
-A discharged battery can freeze at tem­
peratures just below 32 °F (0 °C). Before
connecting a jumper cable, you must
thaw the frozen battery completely, oth­
erwise it could explode.
- 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 batter ies generate explosive gas­
es. Keep sparks, flame and lighted c iga­
rettes away from batteries.
- Do not try to jump start any veh icle w ith
a low ac id 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 bat­
tery. Use of batteries of diff erent voltage
or substantially different "Ah" rat ing
may cause an exp losion and personal in­
jury.
- Never charge a frozen battery. Gas trap­
ped in the ice may cause an explosion.
- Never charge or use a battery that has
been frozen . The battery case may have
be weakened.
- Use of batter ies of different voltage or
substantially different capacity (Ah) rat ­
ing may cause an exp losion and injury .
The ca pa city (Ah) of the booster battery
should not be lower than that of the dis­
charged battery.
- Before you check anything in the engine
compartment, always read and heed all
WARNINGS¢
page 213, Engine com­
partment.
(D Note
- App lying a higher voltage booster bat­
tery will cause expensive damage to sen­
sit ive electronic components, such as
control units, relays, rad io, etc .
- There must be no electrical contact be­
tween the vehicles as otherwise current
could already start to flow as soon as the
posit ive(+) terminals are connected. ..,. •
•

-Jumper cables must be long enough so
that the vehicles do not touch.
- When connecting jumper cables, make
sure that they cannot get caught in any
moving parts in the engine compart­
ment.
- Do not bend over the batteries - danger
of chemical burns!
- The battery cell locking screws must be
tightened securely .
- Before you check anything in the engine
compartment, always read and heed all
WARNINGS
¢pag e 213, Engine com­
partment .
(D Note
Improper hook -up of jumper cables can ru­
in the generator.
- Always connect POSITIVE( +) to POSI­
TIVE(+), and NEGATIVE( -) to NEGATIVE
( - ) ground post of the battery manager
control unit.
- Check that a ll screw plugs on the battery
cells are screwed in firmly. If not, tighten
plugs prior to connecting clamp on nega­
tive battery terminal.
- Please note that the procedure for con­
necting a jumper cable as described
above applies spec ifically to the case of
your vehicle be ing jump started. When
you are giving a jump start to another ve­
hicle, do
not connect the negative(-) ca­
ble to the negative( -) terminal on the
discharged battery@¢
fig. 214. In ­
stead, securely connect the negative(-)
cable to either a solid metal component
that is firmly bolted to the engine block
or to the engine block itse lf. If the bat­
tery that is being charged does not vent
to the outside, escaping battery gas
could ignite and explode!
Emergency situations 2 71
Emergency towing
with commercial tow
truck
General hints
Your Audi requires special handling for tow­
ing.
T he following information is to be used by
commercial tow truck operators who know
how to operate their equipment safely.
- Never tow your Audi, towing will cause
damage to the engine and transmission.
- Never wrap the safety chains or winch ca­
ble s around the brake lines .
- To prevent unnecessary damage, your Audi
must be transported with a flat bed truck.
- To load the vehicle on to the flat bed , use
the towing loop found in the vehicle tools
and attach to the front or rear anchorage
r=:>page 272 and ¢page 272.
A WARNING
A vehicle being towed is not safe for pas­
sengers. Never allow anyone to ride in a
vehicle be ing towed, for any reason.
-
•
•

2 7 4 Emergency situations
This might happen, for e xamp le, when
h eavy components such as the engine
b lock or transmiss io n are removed.
- When removing heavy components li ke
these, ancho r vehicle to ho ist o r add cor­
responding weig hts to ma inta in the cen ­
ter of g ravity . Othe rwise, the v eh icle
m ight tilt or slip
o ff th e hoist, caus ing
s er io us p ers on al inju ry.
(D Note
- Be awa re of the fo llowing points befo re
li fting the veh icl e:
- The vehicle should never be lifted or
jacked up from underneath the engine oil 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
inserted 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,
ensure that there is sufficient clear­ ance between the hoist and low parts
of the vehicle.

General information Explanation of
technical data
Som e of t he technical data listed in this man­
ual requires further explanation.
The technical data for your vehicle is listed in
the charts starting on
c:> page 2 77. This sec­
tion provides general information, notes and
r estr ictions wh ich app ly to this data.
Vehicle identification
The key data is given on the vehicle identifi ca­
tion number ( VIN) plate and the vehicle data
sti cker .
Fig. 221 Veh icle Identificat ion Num ber (VlN) p la te: lo ­
cation o n drive r"s side dash pa nel
Fi g. 22 2 The ve hicle identificat ion label -in side the
l u ggage compartme nt
The Vehicle Identification Number (VlN)
is located on the d river's side so tha t it is v is i­
b le from the outside throug h the windshield
c:> fig . 221. You can also d isplay the Vehicle
Identification N umber of your vehicle in the
radio or in the MM!*. Select: ICAR!function
button
> Vehicle ID number (VIN) or select :
I CA R
I function butto n > Car systems* control
button
> Servicing & checks > VIN number .
General inform ation 275
The vehicle identification label
is lo cated in the l uggage comp artment near
the battery.
T he label~
fig. 222 shows th e fo llow ing vehi­
cl e d ata:
(D Product ion cont ro l No.
@ Vehicle identific ation No.
@ Type code number
© Type designat ion/e ngine o utput in K ilo-
wat ts
® Engine and transm ission code letter
® Pa int No./lnterior
0 Option al eq uipmen t No.'s
Vehicle data 2 to 7 are a lso fo und in your War­
ranty
& Mai nte nance bookle t.
The safety compliance sticker
is your assurance that your new vehicle com­
plies wi th a ll applicable Fede ral Motor Vehicle
Safety S tandards which were in effect at the
tim e the ve hicle was manufactur ed. You ca n
find this sticke r o n the left doo r jamb.
It
sh ows the m onth and ye ar of pro duction and
t h e ve hicl e ident ifi cat io n number of yo ur vehi ­
cle (perfora tion) as well as the G ross Vehicle
Weight Rating (GVW R) and the Gross Axle
Weight Rating (GAWR) .
The high voltage warning label
is lo cated on the l ock ca rrie r.
The spark ignition system complies with
the Canadian standard ICES-002.
Weights
Gross Vehicle Weight Rating
T he Gro ss Vehicle Weigh t Rat ing (GVWR), and
the Gross Axle We igh t Ra tin g (GAWR) for
fron t and rear are listed on a sticker on the
l eft door jamb .
T he Gro ss Vehicle Weigh t Rat ing incl udes the
weig ht o f the bas ic vehicle plus f ull fuel t ank,
oi l and coo lant, p lus maximum load, which in­
cludes passen ger we ight (150 lbs./68 kg per ..,.

complexity of today's automobi les, have
steadi ly reduced the scope of maintenance
and repairs which can be carried out by vehicle
owners.
Also, safe ty and e nvir onm en tal con­
cerns p lace very strict limits on the na ture of
repairs and adjustments to engine and trans ­
miss io n pa rts which an owner can perform .
Maintenance, adjustments and repa irs usua lly
require special tools, testing dev ices and oth­
er equipment avai lab le to specially trained
workshop personnel in order to assure prope r
performance, reliab ility and safety of the vehi­
cle and its many systems .
Improper ma intenance, adjustments and re ­
pa irs can impair the operation and reliability
of your vehicle and even void your vehicle war­ ranty. The refo re, p roof of servici ng in accord­
ance w ith the maintenance sched ule may be a
condition for upholding a poss ible war ranty
claim made within the warranty period.
Above all, operational safety can be adversely
affected, crea ting unnecessary risks for you
and your passengers.
If in doubt about any servicing, have it done
by your authorized Audi dealer or any other
properly equipped and q ualified workshop .
We strong ly urge you to give you r a uthorized
Audi dealer the opportunity to perform all
schedu led maintenance and necessary repairs .
Your dea ler has the facilities, or iginal parts
and trained spec ialists to keep your vehicle
running properly .
Performing limit ed m aintenance you rself
The fo llowing pages describe a limited num­
ber of procedures which can be performed on
your vehicle with ordinary too ls, should the
need arise and trained personnel be unavaila­
b le. Before performing any of these proce­
dures, always thoroughly read all of the app li­
cable text and carefully follow the instruc­
tions given . Always rigorously obse rve the
WARNINGS provided .
Before you check anything in th e engine
compartment, a lway s re ad and heed all
Con sumer In formation 28 1
WARNINGS ¢ & and¢ & in Working in the
engine comportment on page 219 .
A WARNING
-Ser ious personal injury may occur as a re­
sult of improperly performed mainte­ nance, adjustments or repa irs.
-Always be extremely careful when work­ ing on the vehicle. Always follow com­
mon ly accepted safety pract ices and gen­
eral common sense . Never r isk personal
lnJU ry .
- Do not attempt any of the ma intenance ,
checks or repairs descr ibed on the fol­
lowing pages if you are not fully fam iliar
wit h these or othe r pro cedures with re­
spect to t he veh icle, or are uncerta in how
to p roceed .
- Do not do any work without the proper
too ls and equipment. Have the necessary
work done by your authorized A udi deal ­
er or another proper ly equipped and
qualified workshop .
- The engine compartment o f any motor
veh icle is a potentially hazardous area.
Never reach into the area around or
touch the rad iator fan. It is temperature
contro lled and can switch on suddenly -
even when the engine is
off and the igni­
tion key has been removed. The rad iator
fan switches on automat ica lly when the
coo lant reaches a certai n temperatu re
and will cont inue to run until the coo lan t
tempera ture drops .
- Always remove the ign ition key befo re
anyone gets under the vehicle.
- Always support your veh icle with safety
s tands i f it is necessary to work under­
neath the vehicle. The jack s upplied with
the vehicle is not adequate for this pur ­
pose and cou ld collapse causing serio us
personal injury.
- If you must work underneath the vehicle
with the wheels on the ground, a lways
make sure the vehicle is on leve l ground,
that the wheels are a lways securely
blocked a nd that the engine cannot be
started .
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•