2012 VOLVO XC70 check engine light

08 Maintenance and specifications
Hood and engine compartment
08
319 Opening and closing the hood
G010951
Pull the lever located under the left side of
the dash to release the hood lock.
Lift the hood slightly. Press the release
control (located under the right front edge
of the hood) to the left, and lift the hood
WARNING
Check that the hood locks properly when
closed.
Engine compartment, overview
G018945
The appearance of the engine compartment
may vary depending on engine model.
Coolant expansion tank
Power steering fluid reservoir
Engine oil dipstick
Radiator
Filler cap for engine oil
Cover over brake fluid reservoir
Battery
Relay and fuse box
Washer fluid reservoir
Air cleaner
WARNING
The cooling fan may start or continue to
operate (for up to 6 minutes) after the engine
has been switched off.
WARNING
The ignition should always be completely
switched off before performing any opera-
tions in the engine compartment.
The distributor ignition system operates at
very high voltages. Special safety precau-
tions must be followed to prevent injury.
Always turn the ignition off when:
•Replacing distributor ignition compo-
nents e.g. plugs, coil, etc.
•Do not touch any part of the distributor
ignition system while the engine is run-
ning. This may result in unintended
movements and body injury.

08 Maintenance and specifications
Replacing bulbs
08

325
NOTE
•Always switch off the ignition before
starting to replace a bulb.
•The optional Active Bending Light bulbs
contain trace amounts of mercury.
These bulbs should always be disposed
of by a trained and qualified Volvo serv-
ice technician.
Removing the headlight housing1. Switch off the ignition by briefly pressing
the START/STOP ENGINE button.
2. Remove the remote key from the ignition
slot
1.
3. (Upper illustration under "Headlight hous-
ing")
Withdraw the headlight housing's lock-
ing pins.
Pull the headlight housing straight out.
CAUTION
When disconnecting the connector, pull on
the connector itself and not on the wiring.
4. (Lower illustration under "Headlight hous-
ing")
Unplug the wiring connector by holding
down the clip with your thumb.
Pull out the connector with the other
hand.
5. Lift out the housing and place it on a soft
surface to avoid scratching the lens.
6. Replace the defective bulb(s).
Reinserting the headlight housing1. Plug in the connector until it clicks into
place.
2. Reinstall the headlight housing and locking
pins. Check that they are correctly
inserted. The headlight housing must be
properly inserted and secured in place
before the lighting is switched on or the
remote key is inserted into the ignition slot.
3. Check that the lights function properly.
Removing the cover to access the
bulbs
G021745
NOTE
Before starting to replace a bulb, see
page 324.
1. Open the retaining clamp by pressing it to
the side.
2. Press down the clips on the upper edge of
the cover and remove it.
Reinstall the cover in the reverse order.
1Does not apply to vehicles with the optional keyless drive.

08 Maintenance and specifications
Wiper blades and washer fluid
08
332
Replacing the tailgate wiper blade
G032770
1. Fold the wiper arm outward.
2. Grasp the inner section of wiper blade (at
the arrow).
3. Pull out the blade to release it from the
wiper arm.
4. Press the new wiper blade into place and
check that it seats securely.
5. Fold the wiper arm back toward the tailgate
window.
Filling washer fluid
G021764
Location of the washer fluid reservoir
The windshield and headlight washers share a
common reservoir.
The washer fluid reservoir is located on the
driver's side of the engine compartment. Dur-
ing cold weather, the reservoir should be filled
with windshield washer solvent containing
antifreeze. For capacities, see page 359.

08 Maintenance and specifications
Battery
08
334
WARNING
•Never expose the battery to open flame
or electric spark.
•Do not smoke near the battery.
•Battery fluid contains sulfuric acid. Do
not allow battery fluid to contact eyes,
skin, fabrics or painted surfaces. If con-
tact occurs, flush the affected area
immediately with water. Obtain medical
help immediately if eyes are affected.
NOTE
The life of the battery is shortened if it
becomes discharged repeatedly.
Maintenance
•Use a screw driver to open the caps or
cover and a flashlight to inspect the level.
•If necessary, add distilled water. The level
should never be above the indicator.
•The fluid level should be checked if the
battery has been recharged.
•After inspection, be sure the cap over each
battery cell or the cover is securely in
place.
•Check that the battery cables are correctly
connected and properly tightened.
•Never disconnect the battery when the
engine is running, or when the key is in the
ignition. This could damage the vehicle's
electrical system.
•The battery should be disconnected from
the vehicle when a battery charger is used
directly on the battery.
•To help keep the battery in good condition,
the vehicle should be driven for at least 15
minutes a week or connected to a charger
with an automatic charging function.
•If the battery is fully discharged a number
of times, this may shorten its service life.
Keeping the battery fully charged helps
prolong its service life.
•The service life of a battery is affected by
factors such as driving conditions and cli-
mate. Extreme cold may also further
decrease the battery’s starting capacity.
•Because the battery’s starting capacity
decreases with time, it may be necessary
to recharge it if the vehicle is not driven for
an extended period of time or if the vehicle
is usually only driven short distances.
CAUTION
•Always use distilled or deionized water
(battery water).
•Never fill above the level mark in the cell.
Changing

10 Index
10
367
general information............................. 118
Hill Descent Control............................ 124
warning light......................................... 78
Bulbs
cargo area lighting.............................. 329
headlights...........................324, 325, 326
introduction......................................... 324
license plate lights.............................. 329
side marker lights...............................327
specifications...................................... 330
taillight................................................ 328
C
Camera, Park Assist................................ 189
Capacity weight....................................... 297
Cargo area
changing bulbs................................... 329
floor rails............................................. 273
hooks for securing loads............273, 274
steel grid............................................. 276
Cargo area cover..................................... 277
Cargo area net......................................... 277
Catalytic converter................................... 269
Cell phone, hands-free connection......... 233Cell phone voice control.......................... 241
Central locking system, introduction......... 54
Chains...................................................... 300
Check engine light..................................... 76
Child restraints
recalls and registration......................... 38
Child restraint systems.............................. 39
booster cushions.................................. 45
convertible seats.................................. 43
infant seats........................................... 41
ISOFIX/LATCH anchors........................ 46
top tether anchors................................ 47
Child safety................................................ 36
booster cushions.................................. 45
child restraint systems.......................... 39
convertible seats.................................. 43
infant seats........................................... 41
Child safety locks...................................... 51
City Safety™............................................ 166
Climate system........................................ 143
air distribution............................. 138, 144
air vents.............................................. 139
Interior Air Quality System.................. 138
introduction......................................... 137
passenger compartment filter............ 137
refrigerant........................................... 137Clock, setting............................................. 80
Cold weather driving................................ 264
Collision warning system.................171, 172
Compass in rearview mirror..................... 105
Conserving electrical current................... 263
Controls, center console.......................... 256
Convertible seats....................................... 43
Coolant............................................322, 359
Cooling system, general information....... 263
Courtesy lighting........................................ 96
Crash mode............................................... 35
Cruise control..................................151, 152
adaptive.............................................. 153
Curb weight............................................. 297
Current, conserving................................. 263
D
Defroster.................................................. 143
Detachable key blade..........................59, 61
Dimensions
XC70................................................... 354

10 Index
10
368
Disconnecting the front passenger’s air-
bag....................................................... 26, 27
Dome lighting............................................. 96
Door mirrors............................................. 103
Driver alert............................................... 179
Driver distraction warning.......................... 13
Driving economically................................ 262
Driving in cold weather............................ 264
Driving through water..............................263
E
ECC.........................................140, 142, 143
Economical driving.................................. 262
Electric parking brake.............................. 121
Electronic Climate Control.......140, 142, 143
air distribution table............................ 144
Interior Air Quality System.................. 143
ventilated seats................................... 140
Emergency locking retractor...................... 37
Emergency starting.................................. 113
Emergency towing...........................283, 284
Emission inspection readiness................ 317Engine
overheating........................................... 79
specifications...................................... 356
starting................................................ 111
switching off....................................... 113
Engine compartment overview................319
Engine oil
checking............................................. 320
low pressure warning light.............. 77, 78
specifications...................................... 357
volumes.............................................. 358
Environment............................................... 12
Eyelets for anchoring loads..................... 273
F
Federal Clean Air Act............................... 316
Floor mats
cleaning.............................................. 346
placing correctly................................. 111
Floor rails................................................. 273
Fluid specifications.................................. 359
Fog lights
front, changing bulbs.......................... 328
front/rear............................................... 94Four C (active chassis system)................150
Front airbags.............................................. 22
disconnecting passenger’s side air-
bag.................................................. 26, 27
Front fog lights........................................... 94
changing bulbs................................... 328
Front park assist.............................. 185, 187
Front seats...........................................84, 86
heated................................................. 140
Fuel filler cap........................................... 269
Fuel filler door, opening........................... 268
Fuel level warning light.............................. 77
Fuel requirements............................ 266, 267
Fuel tank volume.....................................359
Fuses...............................336, 337, 340, 343
G
Garage door opener
HomeLink® Wireless Control System. 108
Gasoline requirements............................. 267
Gas tank volume...................................... 359
Gauges...................................................... 75

10 Index
10
371
Oil
checking............................................. 320
specifications...................................... 357
volumes.............................................. 358
On Call Roadside Assistance.................. 364
Overhead courtesy lighting........................ 96
Overheating, engine................................... 79
Oxygen sensors, heated.......................... 270
P
Paint, touching up.................................... 347
Park assist.......................................185, 187
Park Assist Camera................................. 189
Parking brake
electric, applying/releasing................. 121
warning light......................................... 78
Parking lights............................................. 94
changing bulbs................................... 327
Personal Car Communicator, unique func-
tions........................................................... 57
Polishing.................................................. 345Power front seat
memory function................................... 85
with keyless drive................................. 86
Power mirrors.......................................... 103
defroster............................................. 104
Power moonroof...................................... 106
Power steering
fluid..................................................... 323
speed-dependent............................... 150
Power steering fluid................................. 359
Power tailgate.......................................... 271
Power windows....................................... 101
laminated glass................................... 102
Pregnancy, using seat belts during........... 20
Private locking........................................... 61
PROPOSITION 65 WARNING. . 113, 335, 360
R
Radio
Sirius satellite radio............................218
Radio functions........................................ 214
HD digital radio................................... 216
Rails, floor................................................ 273Rain sensor................................................ 98
READ button............................................ 129
Rear fog light............................................. 94
Rear park assist............................... 185, 187
Rear seat entertainment..........................245
Rear seat entertainment (option)
headphones........................................246
menus................................................. 251
remote control.................................... 254
Rear seat head restraints........................... 87
Rear seats
center head restraint............................. 87
folding................................................... 87
heated................................................. 141
Rearview mirror
auto-dim function............................... 104
compass............................................. 105
Rear window defroster............................104
Recalls, child restraints.............................. 38
Refrigerant............................................... 359
Refueling..........................................266, 267
fuel filler cap....................................... 269
fuel filler door...................................... 268
fuel tank volume.................................359
Registering child restraints........................ 38