Jeep 2007 Grand Cherokee Series, Owner'S Manual, Page: 412 / 472

EMISSION CONTROL SYSTEM MAINTENANCE
The “Scheduled” maintenance services, listed in bold
type must be done at the times or mileages specified to
assure the continued proper functioning of the emission
control system. These, and all other maintenance services
included in this manual, should be done to provide best
vehicle performance and reliability. More frequent main-
tenance may be needed for vehicles in severe operating
conditions such as dusty areas and very short trip
driving.
Inspection and service also should be done any time a
malfunction is suspected.
NOTE: Maintenance, replacement, or repair of the emis-
sion control devices and systems on your vehicle may be
performed by any automotive repair establishment or
individual using any automotive part which has been
certified pursuant to U.S. EPA or, in the State of Califor-
nia, California Air Resources Board regulations.
MAINTENANCE SCHEDULES
There are two maintenance schedules that show the
required service for your vehicle.
First is Schedule
ⴖ
B
ⴖ
. It is for vehicles that are operated
under the conditions that are listed below and at the
beginning of the schedule.
•
Day or night temperatures are below 32°F (0°C)
•
Stop and go driving
•
Excessive engine idling
•
Driving in dusty conditions
•
Short trips of less than 10 miles (16.2 km)
•
More than 50% of your driving is at sustained high
speeds during hot weather, above 90°F (32°C)
•
Trailer towing
•
Heavy loading
412 MAINTENANCE SCHEDULES
8
M
A
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N
T
E
N
A
N
C
E
S
C
H
E
D
U
L
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