check engine light AUDI A5 COUPE 2010 Owners Manual

& WARNING
• Failure to heed warning lights and other important vehicle
information may result in serious personal injury or vehicle
damage .
• Whenever stalled or stopped for repair, move the vehicle a safe
distance off the road, stop the engine, and turn on the emergency
flasher =>
page 57.
• The engine compartment of any motor vehicle is a potentially
hazardous area. Before you check anything in the engine compart­
ment, stop the engine and let it cool down . Always exercise
extreme caution when working under the hood =>
page 263,
"Engine compartment ".
[ i] Tips
Many functions are monitored by the Auto-Check system
=>
page 27. Malfunctions or faults will be identified either with a red
symbol (priority 1 -Danger!) or with a yellow symbol (priority 2 -
Warning). •
Applies to vehic les: with Audi dr ive select
Dynamic steering c
If the indicator light illuminates when switching on the ignition
and goes out when the engine starts, dynamic steering is activated.
If the indicator light '.,,; illuminates after the engine starts, a system
malfunction has occurred. You can continue to drive carefully at a
reduced speed to a qualified workshop. Steering can be more diffi­
cult or sensitive than usual. The steering wheel may also be at an
angle when driving straight.
Controls and equip­
ment
Instruments and warning/indicator lights
& WARNING
Have the dynamic steering system malfunction repaired as soon
as possible by an authorized Audi dealer or any qualified work­
shop -risk of accident!
[ i] Tips
• If the indicator light 6 flashes, dynamic steering is being re­
initialized. The driver information system display shows the words
"Dynamic steering: initialization"=>
page 33.
• The dynamic steering stability systems are not available in the
event of a system malfunction. •
Electronic power control r.
This warning/indicator light monitors the electronic
power control.
The warning/indicator light (Electronic Power Control) illumi-
nates when you turn on the ignition as a function check.
[ i] Tips
If this warning/indicator light illuminates while you are driving, then
there is a malfunction in the engine electronics . Have the malfunc­
tion corrected as soon as possible by your authorized Audi dealer or
qualified workshop. •
Electronic stabilization program (ESP) If the ~ indicator lamp blinks while driving, the ESP or ASR (Anti­
Slip Regulation) is actively regulating.
If the indicator lamp illuminates, the system has switched the
ESP off. In this case, you can switch the ignition off and then on to .,_
I • •

For more Information~ page 179 , "Safety belt warning light~"-•
Malfunction Indicator Lamp (MIL)
The Malfunction Indicator Lamp (MIU is part of the On -Board Diag ­
nostic (OBD II) system. The symbol "' lights up when the ignition is
turned on and will turn off after the engine has started and has
settled at a constant idle speed. This indicates that the MIL is
working properly .
The warning light illuminates when there is a malfunction in the
engine electronic system. Contact your authorized Audi dealer and
have the malfunction corrected.
For more information
~ page 22. •
High beam ~D
The aD warning/indicator light illuminates when the high beams are
on or when you use the headlight flasher. For more information
about using the high beams, see~
page 58. •
Cruise control CRUISE (USA models)/ 0a
(Canada models)
The warning/indicator light illuminates when the cruise control is
activated. •
Controls and equip ­
ment
Instruments and warning/indicator lights
Anti-lock brake system (ABS) .... (USA models)/
~ (Canada models)
This warning/indicator light monitors the ABS and the
electronic differential lock (EDL).
The warning/indicator light will come on for a few seconds when the
ignition is switched on. The light will go out after an automatic
check sequence is completed.
There is a malfunction in the ABS when:
• The warning/indicator light does not illuminate when you switch
on the ignition .
• The warning/indicator light does not go out after a few seconds.
• The warning/indicator light illuminates while driving.
The brake system will still respond even without the assistance of
the ABS system. See your authorized Audi dealer as soon as
possible to restore full braking performance.
For more information
regarding the ABS~
page 238.
The ABS warning light and the brake warning light come on
together. The ABS will not work and you will notice a change in braking response and performance.
Malfunction in the brake system
If the brake warning light~ page 16and the ABS warning illuminate
together there may be a malfunction in the ABS, and there may also
be a malfunction in the brake system itself=}& .
In the event of a
malfunction in the brake system the warning/indi ­
cator light
BRAKE (USA models)/ ((D) (Canada models) in the instrument
cluster flashes. By pressing the [
SET) button, you can bring up a
driver message which explains the malfunction in more detail.
Please note
~ page 29 . .,,_
I • •

Sound system display
Fig. 9 Di spla y: s ound
system
I f priority 1 or priority 2 faults are not shown by th e Auto Check
Co ntro l, the name of the ra dio s ta tion yo u are tune d to or the
frequency and the reception range are shown in the upper area of
t he d isplay .
Whe n th e CD is i n use , the title of t he track bei ng p layed is shown .
T he CD changer * displays th e number of the current CD (CD 1 to
CD6l . •
Outside temperature display
Con tro ls and eq uip­
ment
Fig . 10 Disp lay:
out side temper atu re
Driver information display
At temperatures be low 41 °F (+5 °C), a snowflake symbol appears in
fr ont of t he te mp eratur e dis play . It is inte nded to remind the d river
to pay special attent ion to
ice on the road.
If your vehicle is stationa ry or if you are d riving at very low speeds,
th e te mpera ture d isplaye d may b e slig htly h igher t han the actu al
temperature outside due to the heat radiating from the engine.
The unit o f measu rement for the temp erature ca n be set in eit her °F
or in °Con the MM I* or on the radio control unit . The outside
tempe rature display a utoma tical ly sh ows the unit of meas urement
that has been set. For additional information , see the MM I* or the
r adi o ins tructi on manual.
& WARNING
• Never use the outside temperature display to determine if a
road surfa ce is icy or not . Keep in mind that road surfa ces , espe ­
cially bridges and overpasses, could be ice covered and slippery
even at an outside temperature above 41
° F (+5 °C ).
• Always remember, even if the "snowflake " symbol (ice
wa rning) does not appear in the display , black ice could be on the
road .
• Always reduce your speed and drive with special care in cold
weather conditions when the chance of encountering icy road surfaces in creases .
[ i ] Tip s
• I f the vehic le is stationary , or if you are driving at a very low
speed, the temperature shown in the d isplay migh t be slightly
h ig her than the actual outside temperature. This is caused by the
heat being radia ted from the engine .•
Vehicle care I I irechnical data

With a priority 1 malfunction, a red symbol appears in the upper
center area of the display=:>
page 28, fig. 26. A driver message
appears as well to explain the ma lfunction in more detail. When this
symbo l appears,
three warning tones sound in succession. The
symbol continues to flash until the fault has been corrected.
If
several priority 1 malfunctions are present, the symbols appear in
succession and remain for about 2 seconds .
T he driver warning goes out after about 5 seconds, but it can be
brought up again at any time by pressing the
I SE T]
button.=:>
page 28
LJ Alternator failure =:> page 29
BRAKE
USA model s: =:> page 29
Brake system malfunctio n
--

Ca nad a mod els: =:> page 29
Brake system malfunction
- F-Engine coolant level too =:> page 30
-low/engine coolant temperature
too high
~ Engine oil pressure too low =:> page 31
~,. Refill engin e oil now =:> page 31
~-e Steering ma lfunction =:> page 32
--
©-e Ignition lock malfunction
=:> page 32
Alternator malfunction 0
If the O symbol in the instrument pane l disp lay flashes, then there
is a malfunction in the alternator or the vehicle electronics. A
warning to the driver will appear, too . The driver warning goes out
Controls and equip ­
ment
•
Dr ive r informat ion di spl ay
after about 5 seconds, but it can be brought up at any time by
pressing the
ISETj button again .
Usually, you can still drive to the next dea lership . Turn off all but the
most necessary electrical consumers, since these drain the vehicle's
battery .
0 Note
If the the .JL warning symbol (coolant system ma lfunction) also
lights up on the instrument pane l during the trip=:>
page 30, then
you have to stop immediately and turn off the engine . The coolan t
pump is not working anymore --danger of damage to the engine! •
Brake system malfunction
A malfunction in the brake system must be repaired as
soon as possible.
If the warning /indi cator light BRAKE (USA models)/ (©)
(Canada models) in the i nstrument cluster flashes, there is
a brake sys tem mal funct ion . A driver message appears as
well to explain the malfunction i n more detail. T he driver
warning goes o ut after about 5 seco nds, but it ca n be
br ought up a t any time by p ressing the !SET] button aga in .
S top th e Vehi cle and Che ck the Brak e Fluid
- Stop the vehicle.
- Check the brake fluid level=> page
280 .
-Seek professional assistance if necessary .
Cauti on! Brake m alfun ction (ABS ) G et it s ervi ced
- Drive carefully to the nearest authorized Aud i dealer or
other qualified workshop and have the malfunction
corrected =>
&. .,_
I • •

Driver information display
Parking brake Please get to a repair shop
-If this symbol appears when the vehicle is stationary or
after the ignition is turned on, check to see if the parking
brake can be released. Drive to an authorized Audi dealer
or other qualified workshop as soon as possible and have
the malfunction corrected. If the parking brake cannot be opened, then take it to an expert at an authorized Audi
dealer.
- If the symbol appears while you are driving, it is possible
that the traction control or the emergency brake has
malfunctioned. It is possible that the parking brake
cannot be applied. It is also possible that the parking
brake cannot be released after it has been applied. Drive
to an authorized Audi dealer or other qualified workshop
to have the malfunction corrected.
If the ABS system malfunctions, the ABS warning/indicator light illu ­
minates together with the brake system malfunction warning/indi­
cator light=>& .
& WARNING
• Always observe the warnings in => page 263, "Engine compart­
ment ", before opening the hood and checking the brake fluid.
• Driving with low brake fluid is a safety hazard. Stop the car and
get professional assistance.
• USA models: If the
BRAKE warning light and the warning
light come on together, the rear wheels could lock up first under
hard braking . Rear wheel lock-up can cause loss of vehicle control
and an accident. Have your vehicle repaired immediately by your
authorized Audi dealer or a qualified workshop. Drive slowly and
avoid sudden, hard brake applications.
• Canada models: If the brake warning light (Ci] and the ABS
warning light come on together, the rear wheels could lock up
& WARNING (continued)
first under hard braking. Rear wheel lock-up can cause loss of
vehicle control and an accident. Have your vehicle repaired imme­
diately by your authorized Audi dealer or a qualified workshop.
Drive slowly and avoid sudden, hard brake applications. •
Engine cooling system malfunction _}_
A malfunction in the engine cooling system must be
repaired as soon as possible.
If the _p_ symbol flashes in the display, either the engine
coolant
temperature is too high or the engine coolant level
is too low. A driver message appears as well to explain the
malfunction in more detail. The driver warning goes out
after about 5 seconds, but it can be brought up at any time
by pressing the [ SET] button again.
Switch off engine and check coolant level
- Pull off the road.
- Stop the vehicle.
- Turn off the engine.
- Check coolant level~
page 278.
- Add coolant if necessary ~ page 279.
Continue driving only after the engine coolant
warning/indicator light goes out.
- Contact your authorized Audi dealer for assistance if
necessary.
If the engine coolant level is correct, then the radiator fan may be
the cause of the malfunction. ...

& WARNING
• If your vehicle should break down for mechanical or other
reasons, park at a safe distance from moving traffic, turn off the
engine and turn on the hazard warning lights
=> page 57, "Emer­
gency flashers
A".
• Never open the hood if you see or hear steam or coolant
escaping from the engine compartment -you risk being scalded.
Wait until you can no longer see or hear steam or coolant
escaping.
• The engine compartment of any vehicle is a dangerous area .
Before you perform any work in the engine compartment, turn of
the engine and allow it to cool . Follow the warning stickers
=> page 263, "Engine compartment".
0 Note
Do not continue driving if the -F-symbol illuminates. There is a
malfunction in the engine cooling system -you could damage your
engine .•
Engine oil pressure malfunction 9=::7-
The red engine oil pressure warning symbol requires
immediate service or repair. Driving with a low oil pres­
sure indication is likely to cause severe engine damage.
If the ~ symbol on the display flashes, the engine oil pres­
sure is too low. A driver message appears as well to explain
the malfunction in more detail. The driver warning goes out
after about 5 seconds, but it can be brought up at any time
by pressing the [SET] button again.
Switch off engine and check oil level
- Stop the vehicle.
Controls and equip ­
ment
Driver information display
Turn the engine off.
- Check the brake fluid level=>
page 275.
Seek professional assistance if necessary.
Engine oil level too low
If the engine oil level is too low, add engine oil=> page 275.
Engine oil level correct
If the symbol "t::7-flashes even though the engine oil level is correct,
please seek professional assistance. Do not continue driving . Do not
leave the engine running
idle, either.
[ i] Tips
• The engine oil pressure symbol "t::7-is not an indicator for a low
engine oil level. Do not rely on it. Instead, check the oil level in your
engine at regular intervals, preferably each time you refuel, and
always before going on a long trip .
• The yellow oil level warning indication .,... requires oil refill or
workshop service without delay. Do not wait until the red oil pres­
sure warning
"t::7-starts to flash before you respond to the low oil
level warning . By then, your engine may already have suffered
serious damage. •
Fill engine oil now ~ ..
~-Please replenish oil now
If the ~ symbol lights up, then the oil has to be replenished right
now =>
page 275. •
I • •

When a yellow warning symbol appears, one warning tone sounds.
A driver message appears as well to explain the malfunc tion in more
detail. The driver warning goes out after about 5 seconds, but it can
be brought up at any time by pressing the
!SE T) button again.
Check the function disp layed as soon as possible . The ye llow
symbol will not go out again until the reason for the malfunction has
been corrected.
If several priority 2 malfunctions are present, the symbols appear in
succession and remain for about 2 seconds .
Controls and equip­
ment
Dynamic steering*
Worn brake pads
Battery voltage
II Defective light bulb*
Check engine oil level
Engine oil sensor malfunction
Low fuel level
Windshield washer fluid
level low
Convenience key*
Key not in vehicle
Light/rain sensor* defective
Dynamic headlight range
control defective =>
page 33
=> page 34
=>
page 35
=> page 35
-
=> page 36
or => page 36
=> page36
=> page 35
=> page 35
=> page 34
=> page 34
=> page 36
Dr ive r informat ion di spl ay
II Battery in remote control key => page 39
-
Electromechanical => page 115
parking brake
-Engine speed limitation* => page 36
adaptive light * defective => page 36
Ignition lock malfunction => page 36
Adaptive dampers* => page 36
"Windshield wiper defective => page 37
-
Significant loss of air pres -=> page 307
sure*
Tire pressure monitoring syste
=> page 307
m* (malfunction)
[ i ] Tip s
The speed warnings warning threshold 1 '") and warning threshold
2 :,. are also yel low symbo ls in some models. The warning is always
shown as a small symbol in the upper area of the display
=> page 26. •
Applies t o veh ic les: w ith Audi dri ve sele ct
Dynamic steering
D yn a m ic s te er ing : Syste m malfun cti on
This driver message and the symbol appear when a system
malfunction occurs during travel. You can continue to drive care­
fully at a reduced speed to a qualified workshop. Steering can be .,_
I • •

Driver information display
more difficult or sensitive than usual. The steering wheel can also
be at an angle when driving straight.
Dynamic steering: initialization
If this driver message appears and the indicator light is flashing
on the instrument panel, dynamic steering is being reinitialized.
Once you start the engine after this is finished, the steering wheel
wi ll be easy to move. Re-initialization might be necessary if the
steering whee l was moved hard to the left and right while the
vehicle was not moving. The display goes out as soon as initializa­
tion is complete .
& WARNING
Have the dynamic steering system malfunction repaired as soon
as possible by an authorized Audi dealer or any qualified work­
shop -risk of accident!
[ i ] Tips
The dynamic steering stability systems are not available in the event
of a system malfunction. •
Applies to vehi cles: wit h conven ienc e key
Key not in vehicle
Key not in vehicle
This reminder appears along with the symbol if the master key is
removed from the vehicle with the engine running. It is intended to
remind you (e .g. when changing drivers) not to continue the journey
without the master key.
If the master key is no longer in the vehicle, you cannot switch off
the ignition after stopping the engine and you also cannot start the
engine again . You also cannot lock the vehicle from the outside .•
Ap plies to vehi cles : w it h li ght/ ra in sensor
Light /rain sensor defective C../1
...i-Automatic headlights /automatic wipers defective
If the symbo l il luminates, the light sensor has failed . For safety
reasons the low beams are turned on permanently with the switch
in
AUTO . However, you can continue to turn the lights on and off
using the light switch. In the case of a defect in the rain sensor, the
windshie ld wiper lever functions are still available. Have the
light/rain sensor checked as soon as possible by an authorized Audi
dea ler. •
Worn brake pads
Brake pads!
If the warning light illuminates, immediately contact your autho­
rized Audi dealer or qualified workshop to have all brake pads
inspected . On USA models the warning light 't comes on together
with the warning light
BRAKE . Both sets of brake pads on an axle must
a lways be replaced at the same time .
& WARNING
Driving with bad brakes can cause a collision and serious personal
injury.
• If the warning light and the warning lig ht
BRAKE1
l with the
message Brake pads! comes on in the instrument cluster display ,
immediately contact your authorized Audi dealer or qualified
workshop to have all brake pads checked or replaced if
necessary .•
1 1 BRAK£ : USA models only

Applies to vehic les: with defective light bulb warn ing
Defective light bulb warning
The defective light bulb warning monitors the function of
the light bulbs in the vehicle.
The defective light bulb warning monitors the function of the light
bulbs. If a defective light bulb is detected, or if a light bulb has
burned out, a yellow symbol appears as well as a notification that
shows which light bulb is defective.
Defective bulb
If this symbol lights up, a turn signal (front or rear), a headlamp,
a brake light, the back-up light, a fog lamp or a rear fog lamp has
failed.
& WARNING
• Light bulbs are under pressure and can explode when bulbs are
replaced -risk of injury.
• With gas-discharge lamps* (xenon headlights), the high­
voltage component must be handled appropriately. Doing other­
wise poses a risk of death!
[ i] Tips
Have an authorized Audi dealer or other qualified workshop perform
the replacement or the repair. •
Windshield washer fluid level too low ->
Top off the washer fluid
If the symbol illuminates, add windshield washer fluid to the washer
system and also to the headlight washer system* =>
page 286. •
Controls and equip ­
ment
Driver information display
Fuel supply too low \l
When the symbol illuminates, this means there are about 2.1
gallons
(8 liters) of fuel left in the fuel tank. Time to refuel!
=>
page 266.
If the symbol lights up, even when there is ample fuel in the tank,
and the text
TANK SYSTEM MALFUNCTION ! CONTACT WORKSHOP
appears in the display, there is a fault in the system. Contact a qual­
ified workshop to have the fault rectified. •
Applies to veh icles: with battery voltage warning
Battery voltage ..:J
If battery power drops into the range where it can limit the ability of
the engine to start, this the symbol appears in the instrument
cluster display with the following driver message
battery charge
low: Indicates charging by being driven .
While this driver notification is displayed, you have to be prepared
for limited starting capability.
Driver message appears and goes out again
If this driver message appears after the ignition is turned on or
while driving and it goes out again after a while, the battery has
been adequately recharged.
Driver message appears and does not go out again
If this driver notification appears after the ignition is turned on or
while driving and does not go out again, the battery's state of
charge is not in the optimal range. Starting capability is restricted.
Have the battery checked at an authorized Audi dealer or other qual­
ified workshop as soon as possible. •
I • •

Driver information display
Check engine oil ~
:... Please top off with max. 1 L of oil . You can keep driving.
If the .._. symbol lights up displaying this driver message, then add
a maximum of 1 liter at your earliest opportunity=>
page 275. •
Engine oil level 'I..!.
Please check oil level
When the symbol illuminates, check the engine oil level as soon as
possible =>
page 275. Top off the oil at your earliest opportunity
=>
page 275. •
Engine oil sensor defective --
,. Oil level! Sensor defective
If the symbol illuminates, contact your authorized Audi dealer and
have the oil sensor inspected . Until you have this done, check the oil
level each time you refuel just to be on the safe side=>
page 275. •
Applies to vehi cles: with engine spee d lim itation
Engine speed limitation
~ Engine speed maximum XXXX RPM
The / symbol illuminates when there is an engine control malfunc­
tion . The indicator light • in the instrument cluster also illumi­
nates. The engine speed is limited to the speed displayed in the
driver information system. Keep in mind that the engine speed will not exceed the value displayed in the driver information system, for
example when downshifting.
Please go to an authorized Audi dealer or other qualified workshop
to have the malfunction repaired. •
• Headlight range control defective )
, > Headlight range control defective !
If the symbol "', illuminates, the dynamic headlight range control is
no longer working properly. Have the system checked and repaired
at your authorized Audi dealer. •
Applies t o vehicl es: with a dapt iv e ligh t
Adaptive light defective .CJ
Adaptive Light defective
When this symbol illuminates, it means that adaptive light is
defective. Go to an authorized Audi dealer to have the headlights or
the control unit for the adaptive light repaired. •
Ignition lock malfunction ~
Ignition lock defective
If the symbol in the display comes on, there is a malfunction in
the electronic ignition lock. Please go to an authorized Audi dealer
or other qualified workshop to have the malfunction repaired. •
Applies to vehi cles : with Audi drive se lec t
Adaptive dampers
11
Adaptive dampers: system malfunction
If the symbol in the display comes on, there is a malfunction in the
adaptive dampers . Please go to an authorized Audi dealer or other
qualified workshop to have the malfunction repaired. •