2007 CHEVROLET HHR check engine light

Avoid needless heavy braking. Some people drive
in spurts — heavy acceleration followed by
heavy braking — rather than keeping pace with
traffic. This is a mistake. The brakes may
not have time to cool between hard stops. The
brakes will wear out much faster if you do a lot of
heavy braking. If you keep pace with the traffic
and allow realistic following distances, you
will eliminate a lot of unnecessary braking. That
means better braking and longer brake life.
If your vehicle’s engine ever stops while you are
driving, brake normally but do not pump the
brakes. If you do, the pedal may get harder to
push down. If the engine stops, you will still have
some power brake assist. But you will use it
when you brake. Once the power assist is used
up, it may take longer to stop and the brake pedal
will be harder to push.
Adding non-GM accessories can affect your
vehicle’s performance. SeeAccessories and
Modifications on page 289.Anti-Lock Brake System (ABS)
Your vehicle may have the Anti-Lock Brake
System (ABS), an advanced electronic braking
system that will help prevent a braking skid.
If your vehicle has ABS,
this warning light on the
instrument panel will
come on briey
when you start your
vehicle.
When you start your engine, or when you begin to
drive away, your ABS will check itself. You may
hear a momentary motor or clicking noise
while this test is going on, and you may even
notice that your brake pedal moves or pulses a
little. This is normal.
243

You can run the engine to keep warm, but be
careful.
{CAUTION:
Snow can trap exhaust gases under your
vehicle. This can cause deadly CO
(carbon monoxide) gas to get inside.
CO could overcome you and kill you. You
cannot see it or smell it, so you might not
know it is in your vehicle. Clear away
snow from around the base of your
vehicle, especially any that is blocking the
exhaust pipe. And check around again
from time to time to be sure snow does
not collect there.
Open a window just a little on the side of
the vehicle that is away from the wind.
This will help keep CO out.
Run the engine only as long as you must. This
saves fuel. When you run the engine, make it go a
little faster than just idle. That is, push the
accelerator slightly. This uses less fuel for the
heat that you get and it keeps the battery charged.
267

Adding Equipment to the Outside
of Your Vehicle
Things you might add to the outside of your
vehicle can affect the airow around it. This may
cause wind noise and affect windshield washer
performance. Check with your dealer before
adding equipment to the outside of your vehicle.
Fuel
Use of the recommended fuel is an important part
of the proper maintenance of your vehicle. To
help keep your engine clean and maintain optimum
vehicle performance, GM recommends the use
of gasoline advertised as TOP TIER Detergent
Gasoline.
The 8th digit of your Vehicle Identication Number
(VIN) shows the code letter or number that
identies your engine. You will nd the VIN at the
top left of the instrument panel. SeeVehicle
Identification Number (VIN) on page 379.
Gasoline Octane
If your vehicle has the 2.2L L4 engine
(VIN Code D), use regular unleaded gasoline with
a posted octane rating of 87 or higher. If the
octane rating is less than 87, you may notice an
audible knocking noise when you drive, commonly
referred to as spark knock. If this occurs, use a
gasoline rated at 87 octane or higher as soon
as possible. If you are using gasoline rated at
87 octane or higher and you hear heavy knocking,
your engine needs service.
If your vehicle has the 2.4L L4 engine
(VIN Code P), use premium unleaded gasoline
with a posted octane rating of 91 or higher. You
may also use regular unleaded gasoline rated at
87 octane or higher, but your vehicle’s acceleration
may be slightly reduced, and you may notice a
slight audible knocking noise, commonly referred to
as spark knock. If the octane is less than 87, you
may notice a heavy knocking noise when you drive.
If this occurs, use a gasoline rated at 87 octane or
higher as soon as possible. Otherwise, you might
damage your engine. If you are using gasoline
rated at 87 octane or higher and you hear heavy
knocking, your engine needs service.
291

Center High-Mounted
Stoplamp (CHMSL).................................. 331
Chains, Tire................................................. 353
Charging System Light................................ 184
Check
Engine Light............................................ 188
Checking Things Under the Hood................ 296
Chemical Paint Spotting.............................. 377
Child Restraints
Child Restraint Systems............................. 49
Infants and Young Children........................ 46
Lower Anchors and Tethers
for Children............................................ 56
Older Children........................................... 43
Securing a Child Restraint in a
Rear Seat Position................................. 63
Securing a Child Restraint in the
Right Front Seat Position........................ 66
Where to Put the Restraint........................ 53
Cigarette Lighter.......................................... 170
Cleaning
Aluminum or Chrome-Plated Wheels........ 375
Exterior Lamps/Lenses............................. 374
Fabric/Carpet........................................... 371
Finish Care.............................................. 374
Inside of Your Vehicle.............................. 370Cleaning (cont.)
Instrument Panel, Vinyl, and Other
Plastic Surfaces.................................... 372
Tires........................................................ 376
Underbody Maintenance........................... 377
Washing Your Vehicle .............................. 373
Weatherstrips........................................... 373
Windshield and Wiper Blades................... 375
Climate Control System............................... 170
Air Filter, Passenger Compartment........... 175
Outlet Adjustment..................................... 174
Clutch, Hydraulic......................................... 306
Collision Damage Repair............................. 424
Comfort Guides, Rear Safety Belt................. 39
Compact Spare Tire.................................... 369
Compass............................................134, 136
Content Theft-Deterrent............................... 111
Control of a Vehicle..................................... 242
Convenience Net......................................... 147
Coolant
Engine Temperature Gage........................ 188
Engine Temperature Warning Light........... 187
Heater, Engine......................................... 121
Cooling System........................................... 312
Cruise Control............................................. 160
Cupholder(s)................................................ 143
435

E
Electric Power Management........................ 168
Electrical System
Add-On Equipment................................... 380
Engine Compartment Fuse Block............. 383
Floor Console Fuse Block........................ 381
Fuses and Circuit Breakers...................... 381
Headlamp Wiring..................................... 380
Power Windows and Other Power
Options................................................. 380
Windshield Wiper Fuses........................... 380
Engine
Air Cleaner/Filter...................................... 304
Battery..................................................... 320
Check and Service Engine Soon Light..... 188
Coolant.................................................... 306
Coolant Heater......................................... 121
Coolant Temperature Gage...................... 188
Coolant Temperature Warning Light.......... 187
Drive Belt Routing.................................... 406
Engine Compartment Overview................ 298
Exhaust................................................... 132
Oil ........................................................... 299
Oil Life System........................................ 302
Overheating............................................. 309
Starting.................................................... 119Enhanced Traction System (ETS) ................ 246
Warning Light........................................... 187
Entry/Exit Lighting....................................... 167
Event Data Recorders (EDR)...................... 423
Extender, Safety Belt..................................... 42
F
Filter
Engine Air Cleaner................................... 304
Finish Damage............................................ 377
Fixed Mast Antenna.................................... 236
Flashers, Hazard Warning........................... 154
Flash-to-Pass.............................................. 156
Flat Tire...................................................... 354
Flat Tire, Changing...................................... 355
Flat Tire, Storing......................................... 365
Fluid
Automatic Transaxle................................. 305
Manual Transaxle..................................... 305
Windshield Washer.................................. 316
Fog Lamp Light........................................... 193
Fog Lamps.................................................. 166
Folding Rear Seat......................................... 17
Folding Seatback, Passenger........................ 14
Front Console Storage Area........................ 143
437

Fuel............................................................ 291
Additives.................................................. 292
California Fuel.......................................... 292
Filling a Portable Fuel Container.............. 296
Filling Your Tank...................................... 294
Fuels in Foreign Countries....................... 293
Gage....................................................... 193
Gasoline Octane...................................... 291
Gasoline Specications............................ 292
Fuses
Engine Compartment Fuse Block............. 383
Floor Console Fuse Block........................ 381
Fuses and Circuit Breakers...................... 381
Windshield Wiper..................................... 380
G
Gage
Engine Coolant Temperature.................... 188
Fuel......................................................... 193
Speedometer........................................... 179
Tachometer.............................................. 179
Gasoline
Octane..................................................... 291
Specications........................................... 292
Glove Box................................................... 143
GM Mobility Reimbursement Program.......... 417
H
Hazard Warning Flashers............................ 154
Head Restraints............................................ 13
Headlamp
Aiming..................................................... 327
Headlamp Wiring......................................... 380
Headlamps.................................................. 163
Automatic Headlamp System.................... 165
Bulb Replacement.................................... 330
Daytime Running Lamps.......................... 164
Flash-to-Pass........................................... 156
Halogen Bulbs......................................... 330
Headlamps, Front Turn Signal, and
Parking Lamps..................................... 330
High/Low Beam Changer ......................... 156
On Reminder........................................... 164
Wiper Activated........................................ 164
Heated Seats................................................ 10
Heater......................................................... 170
Height Adjuster, Driver Seat............................ 9
Highbeam On Light..................................... 193
Highway Hypnosis....................................... 261
Hill and Mountain Roads............................. 262
Hood
Checking Things Under............................ 296
Release................................................... 297
438

MP3 ............................................................ 226
MyGMLink.com............................................ 415
N
New Vehicle Break-In.................................. 115
Normal Maintenance Replacement Parts..... 405
O
Odometer.................................................... 179
Off-Road Recovery...................................... 251
Oil
Engine..................................................... 299
Pressure Light.......................................... 192
Oil, Engine Oil Life System......................... 302
Older Children, Restraints............................. 43
Online Owner Center................................... 415
OnStar
®System, see OnStar®Manual........ 139
Other Warning Devices................................ 154
Outlet Adjustment........................................ 174
Outlet(s), Accessory Power.......................... 169
Outside
Convex Mirror.......................................... 138
Power Mirrors.......................................... 138
Owner Checks and Services....................... 398
Owners, Canadian.......................................... 3
P
Paint, Damage............................................ 377
Park (P)
Shifting Into............................................. 128
Shifting Out of......................................... 130
Parking
Brake....................................................... 127
Over Things That Burn............................ 131
Parking Your Vehicle................................... 130
Passenger Airbag Status Indicator............... 182
Passenger Compartment Air Filter............... 175
Passenger Sensing System........................... 82
Passing....................................................... 251
PASS-Key
®III+........................................... 113
PASS-Key®III+ Operation........................... 114
Power
Accessory Outlet(s).................................. 169
Door Locks.............................................. 104
Electrical System..................................... 380
Lumbar Controls........................................ 10
Retained Accessory (RAP)....................... 119
Seat............................................................ 9
Windows.................................................. 110
Pressure Cap.............................................. 309
Pretensioners, Safety Belt............................. 42
Programmable Automatic Door Unlock......... 105
441