Volvo XC90 2021 Owner's Manual page 595

Periodic maintenance helps minimize
emissions
NOTE
Refer to your Service and Warranty
•
Booklet for a comprehensive service
and maintenance schedule up to
240,000 km (150,000 miles). This
program contains inspections and ser-
vices necessary for the proper function
of your vehicle and includes compo-
nents that affect vehicle emissions.
The Warranty and Service Records
•
Information booklet also contains
detailed information concerning the
warranties that apply to your vehicle.
On-board Diagnostic System
OBD II is part of your vehicle's computerized
engine management system. It stores diag-
nostic information about your vehicle's emis-
sion controls. It can light the Check Engine
light (MIL) if it detects an emission control
"fault." A "fault" is a component or system
that is not performing within an expected
range. A fault may be permanent or temporary.
OBD II will store a message about any fault.
Emission inspection readiness
How do states use OBD II for emission
inspections?
Many states connect a computer directly to a
vehicle's OBD II system. The inspector can
then read "faults." In some states, this type of
inspection has replaced the tailpipe emission
test.
How can my vehicle fail OBD II emission
inspection?
Your vehicle can fail OBD II emission inspec-
tion for any of the following reasons:
If your Check Engine (MIL) light is lit, your
•
vehicle may fail inspection.
If your vehicle's Check Engine light was lit,
•
but went out without any action on your
part, OBD II will still have a recorded fault.
Your vehicle may pass or fail, depending
on the inspection practices in your area.
If you had recent service that required dis-
•
connecting the battery, OBD II diagnostic
information may be incomplete and "not
ready" for inspection. A vehicle that is not
ready may fail inspection.
How can I prepare for my next OBD II
emission inspection?
If your Check Engine (MIL) light is lit or
•
was lit but went out without service, have
MAINTENANCE AND SERVICE
your vehicle diagnosed and, if necessary,
serviced by a qualified Volvo technician.
If you recently had service for a lit Check
•
Engine light, or if you had service that
required disconnecting the battery, a
period of driving is necessary to bring the
OBD II system to "ready" for inspection.
Two half-hour trips of mixed stop-and-go/
highway driving are typically needed to
allow OBD II to reach readiness. Your
Volvo retailer can provide you with more
information on planning a trip.
Maintain your vehicle in accordance with
•
your vehicle's maintenance schedule.
Owner maintenance
Periodic maintenance requirements and inter-
vals are described in your vehicle's Warranty
and Service Records Information booklet.
The following points can be carried out
between the normally scheduled maintenance
services.
Each time the vehicle is refueled:
Check the engine oil level.
•
Clean the windshield, windshield wipers,
•
headlights, and taillights.
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