check engine AUDI A4 2015 Service Manual

"' N
0 ::.,: co ,...., \!) 1.1'1 ,...., 1.1'1 ,....,
Automatic climate control Air vents ... ..... ..... ... .. .. .. .... 80
Operation . . . . . . . . . . . . . . . . . . . . . . . . . 79
Setup ... .. ................. .. .... 81
Automatic S hift Lock (ASL) .. .. .. .. .. .. 95
Automatic transmission . . . . . . . . . . . . . . . 93
Automatic S hift Lock (ASL) . . . . . . . . . . . 95
D riving .. .. ............. .... .. .. .. 95
E mergency mode . . . . . . . . . . . . . . . . . . . 99
E me rgency release ........ .. .. .. .. . 100
Kick -down . . . . . . . . . . . . . . . . . . . . . . . . . 98
M anual shift program .. ... .. .. .. .. .. 98
Remova l lock (ignition key) ... .. .. .. .. 82
Selector lever . . . . . . . . . . . . . . . . . . . . . . 94
Automatic wipe rs . . . . . . . . . . . . . . . . . . . . 55
Auto Safety Hotline . . . . . . . . . . . . . . . . . 134
Average speed . . . . . . . . . . . . . . . . . . . . . . . 24
Avoid damag ing the vehicle .. .. .. .. .. . 193
B
Bag hooks . . . . . . . . . . . . . . . . . . . . . . . . . . 7 4
Battery . . . . . . . . . . . . . . . . . . . . . . . 16, 222
Battery location inside the luggage com -
partment .. .. ........... .. .. .. ... 222
Charging . ................ ... ... .. 224
Important warn ings when working on
the battery . ................ ... ... 222
J ump starti ng ............ .... .. .. . 274
L ow . .. .. .. .. .. ........... .. .. ... 19 1
Replacing the ba ttery .. ... .. .. .. .. . 225
State of charge . . . . . . . . . . . . . . . . . . . . 191
Winter operation . ..... ... .. .. .. .. . 222
Working on the battery .... .. .. .. .. . 222
B efore driving ............. .... .. .. . 126
Bio-ethanol (Fuel) ..... ..... .. .. .. .. . 208
Blended gasoline ... .... ... .. .. .. .. . 207
B lower (automatic climate cont rol) . . . . . . 80
Booster seats ............. .... .. .. . 173
B rake fl uid
Changing the brake fl uid ... .. .. .. .. . 22 1
Checking the brake fluid level ... .. .. . 221
Reservoir .. ............. .... .. ... 221
What is the correct brake flu id leve l? . . 221
What should I do if the brake fluid warn-
i ng light comes o n? .. ..... .. .. .. .. . 221
Inde x 289
Brake system . ..... ... .. .. ..... ... .. 221
Anti- lock b raking system ..... ... .. .. . 19
•
B rake assist system .. .. ..... ... .. .. 185 •
Brake fluid .. .. .. ................. 221
Brake fluid specifications for refill and re-
placement ...... .. ............... 221
B rake light defective ... .. .. ... ... .. . 21
B ra ke powe r ass ist unit ............ . 188
Br akes .. .. .. .. .. .. . .............. 188
Ceram ic bra kes . .. .... ........... .. 188
El ec tromechanica l parking brake ... .. . 87
Warning/indicator lights ..... ... .. .. . 15
Wor n brake pads symbo l . . . . . . . . . . . . . 20
B ra kin g
E mergency bra king f unct ion ..... .. .. . 89
braking guard . .. .... ... ....... ..... 101
Messages . . . . . . . . . . . . . . . . . . . . . . . . 109
Settings ........ .. ............... 108
Break -in per iod .. .. .... ............. 193
Tires ... .. .. .. .. .. ............... 193
Bul bs . ... .. .. .... .. . .. .. ..... ... .. 2 72
C
Califor nia Proposition 65 Warn ing . .. .. 213
B attery spec ifi c .. ............. .. .. 223
Capacities ........ .. ............... 281
Carbon pa rts
Cleaning . . . . . . . . . . . . . . . . . . . . 204, 205
Care ..... .. .. .. .... ... .......... .. 202
Cargo area
refer to L uggage compartment . . . 70, 132
Catalytic converter ... .. ...... ... .. .. 194
Cen te r armrest . . . . . . . . . . . . . . . . . . . . . . 62
Central lock ing .. .. ................. . 31
Cen tral lock ing switch ............. .. 35
Co nvenience key .. .. . .. .. .. ... ... .. . 35
Remote cont ro l key . . . . . . . . . . . . . . . . . 34
Ceram ic brake rotors
New brake pads .. ............. .... 188
Ce rtification . ... .... . ... ...... ... .. 286
Chang ing a flat t ire . .. ... ....... .... . 263
Chang ing a wheel .. ............. .... 263
Chang ing engine oil ............. .... 217
Checking Engine coolant level .... ....... .... . 218
Checking t ire pressure ............... 239

292 Index
Starting with jumper cab les . ....... . 274
Stopping . . . . . . . . . . . . . . . . . . . . . . 84, 86
E ng ine compartment
Safety instructions ...... .. .. .. .. .. . 212
Working the engine compartment 212
Eng ine coolant
Indicator light . . . . . . . . . . . . . . . . . . . . . 17
E ngine coolant system ...... .. .. .... . 218
Adding coolant ........... .. .. .. .. . 219
Checking coolant level ..... .. .. .. .. . 218
Check ing the eng ine coolant level .. .. . 218
Radiator fan .............. ... .. .. . 220
E ngine coolant temperature
Temperature gauge ....... .. .. .... .. 10
Engine hood
C losing ......... ......... ... .... . 212
How to release the hood ............ 212
E ng ine oil . .... ........... ........ . 214
Adding .. .. ............. .. .. .. .. . 216
Addit ives ... ................ ..... . 216
Changing . ................. ..... . 217
Check oil level ............ ... .... . 216
Consumption ............ .. .. .. .. . 216
Indicator light . . . . . . . . . . . . . . . . . 17, 21
Oil consumption ............ .. .... . 215
Oil grades .. ................ ... .. . 214
Pressure malfunction ...... .. .. .. .. . . 17
Sensor defective . . . . . . . . . . . . . . . . . . . . 21
Specification and viscos ity .. .. .. .... . 214
Engine speed limitation ......... .... .. 20
Environment Break- in period ............ ... .... . 193
Cata lytic converter ............ .. .. . 194
Disposing of your vehicle battery ..... 225
Driving at high speeds ..... .. .. .. .. . 195
Driving to minimize pollution and noise 195
Fuel ..... .. ..... ........... ... .. . 210
Fuel economy ............. ... .. .. . 195
L eaks under your veh icle . .. .. .. .. .. . 212
L ett ing the vehicle stand and wa rm up . 196
Proper disposal of drained brake fluid . 221
Proper disposal of drained engine coo l-
ant ..... .. ................ ..... . 219
Proper disposal of dra ined engine
oil .. .. .. ................. .. 216,217
Recycling used engine oil ... .. .. .. .. . 216
Roof rack . . . . . . . . . . . . . . . . . . . . . . . . . 70 Unleaded fuel
.... ................ . 207
What shou ld I do with an o ld battery? . 22S
EPC
refer to E lectronic power control . . . . . . 20
Ethyl alcohol (Fuel) . .. .. ...... ... .. .. 208
Event Data Recorder (EDR) ............ 184
Exhaust tail pipes
Cleaning .. .... .. ............. .... 203
Expansion tank .... ............. .... 218
Exterior lighting ... ................ .. 49
Exterior m irrors
Adjust ing . .. .. .. .. ........... .. .. . 52
Dimming .. .... .. ............. ..... 53
Heating . .. .. .. . .............. .. .. . 52
F
Fan
Radiator 220
Fastening Booster seats . . . . . . . . . . . . . . . . . . . . . 173
Convertib le child safety seats .. ... ... 172
Infant seats ... .. ... .......... .... 171
Fa stening eye s
refer to Tie-downs .. .... .... ... .. .. . 74
Flat tire Changing ..... .. ................ . 263
flexib le fue l ....... ............. .... 208
Floor .. .... .... .. ................. . 76
Floor mats . ..... .. ................ . 131
Fog lights/rear fog light(s) ......... ... . 49
Folding the rear seats ............ .... . 71
Foot pedals . .... .. ............. .... 131
For the sake of the environment Gasoline fumes and the env ironment .. 210
Letting the engine warm up . . . . . . 82, 85
Refueling . .. .. .. ... .......... .... 210
Sav ing fuel by early upshifting . .. .. .. . 11
Front airbags Description . . . . . . . . . . . . . . . . . . . . . . . 148
How they work . .. .......... ...... . 153
Frontal collisions and the laws of physics 137
Front passenger's door emergency lock ing 37
Front seats Adjusting ... .. .. ....... ...... .. .. 128
Child restraints in the front seat .. .. .. 145

294 Index
Important things to do before driving .. 126
Improperly worn safety belts ..... .. ... 142
Indicator lights ............ .. .. .. .. .. 13
Airbag system . . . . . . . . . . . . . . . 154, 155
Dynamic steering ...... ... .. .. .. .. . 190
PASSENGER AIR BAG OFF ........ .. . 155
also refer to Warn ing/ indicator l ights .. 13
Infant seats . . . . . . . . . . . . . . . . . . . . . . . 171
I nflatable spare tir e ...... .. .. .. .. .. . 261
I nflating ........ ......... ... .... . 262
Installing ch ild safety seats
Safety belts .............. ... .. .. . 175
Installing the upper tether strap on the
anchorage . .. ............... .. .... . 182
I nstruments
Adjusting the lighting ........... .. .. 52
I nstruments and controls ... .. .. .. .. . . 10
General illustration ....... .. .. .. .. . .. 8
Interior lights Front .. .. .. ................ ... ... . 52
Rear .. .... .......... ...... ... .. .. 52
Intermittent (windshield wipers) . . . . . . . 55
J
Jump-starting .............. ... .... . 274
Jumper cables ................ ... ... 275
K
Key .... ... .. ................ ... .. .. 32
Battery replacement ...... .. .. .. .. .. 33
Check light ....... ..... .. .. .. .. .. .. 33
E mergency key . . . . . . . . . . . . . . . . . 32, 84
I gnition/engine on/off . . . . . . . . . . . . . . . 82
Key replacement ............. .... .. 32
Mechanical key . . . . . . . . . . . . . . . . . 32, 33
removing . . . . . . . . . . . . . . . . . . . . . . . . . 84
un locking/locking ........ .. . 34, 35, 37
Kick-down . . . . . . . . . . . . . . . . . . . . . . . . . . 98
L
Lane Change Ass istant
refer to side assist ........ .. .. .. .. . 111
LATC H .. .. .. ............. .. .. .. ... 179
Descr ipt ion .... .... ...... .. .. .. .. . 180
Install ing a child restraint ...... .. ... 180 Location
. . . . . . . . . . . . . . . . . . . . . . . . . 179
Mounting and releasing the anchorage
hook ............................ 180
Launch Control Program ......... .. .. . 99
Leather cleaning/protect ion .. .. .. .. .. 205
Leaving home ..... ................ .. 50
Left hand drive . . . . . . . . . . . . . . . . . . . . . . 51
Lifting jack . .... .. ............. .... 265
Lifting vehicle ... .. ............. .... 278
Light adaptive light . . . . . . . . . . . . . . . . . . . . . . 49
Coming/Leav ing home . . . . . . . . . . . . . . . 50
Daytime running lights . . . . . . . . . . 49, 50
Exterior lighting . . . . . . . . . . . . . . . . 49, 50
Fog lights/rear fog light(s) .......... . 49
Interior/reading . . . . . . . . . . . . . . . . . . . . 52
Low beam ..... .. ............. ..... 49
Rear fog lights ... ... .......... .. .. . 49
Side marker lights ............. .... . 49
Travel mode . . . . . . . . . . . . . . . . . . . . . . . 51
Light/rain sensor Headlights . ..... ................ .. 49
I ntermittent (windshield wipers) . .... . 55
Sen sor defe ctive . . . . . . . . . . . . . . . . . . . . 22
Lights
Emergency flashers . . . . . . . . . . . . . . . . . 51
High beam .... .. ................ .. 50
Tu rn signals ... ... ................ . 50
Locking Rear lid . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Locking/unlocking at the lock cylinder . . . . . . . . . . . . . . . . . . 3 7
by remote control . . . . . . . . . . . . . . . . . . 34
with the centra l locking switch ... .... . 35
with the conven ience key . . . . . . . . . . . . . 35
Low beams ..... .. ..... ........... .. 49
Lower anchorage locator button ....... 180
Lower universal anchorage bars (Canada) 179
Lower universal anchorages (Canada) 179
Luggage Stowing . ..... .. ............. .... 132
Luggage compartment ........... .. .. . 70
Cargo net ... .. .. ............. .. .. . 73
Cover ......... .. ................ .. 71
Enlarging . . . . . . . . . . . . . . . . . . . . . . . . . 71
Floor ......... .. ................ .. 76
Lid ....... .... .. ................. . 38