Onboard Diagnostic System - Obd Ii; Cybersecurity - Jeep GRAND CHEROKEE 4xe 2023 Owner's Manual

ONBOARD DIAGNOSTIC SYSTEM — OBD II
Your vehicle is equipped with a sophisticated
Onboard Diagnostic system called OBD II.
This system monitors the performance of the
emissions, engine, and transmission control
systems. When these systems are operating
properly, your vehicle will provide excellent
performance and fuel economy, as well as
engine emissions well within current government
regulations.
If any of these systems require service, the
OBD II system will turn on the Malfunction Indicator
Light (MIL). It will also store diagnostic codes and
other information to assist your service technician
in making repairs. Although your vehicle will
usually be driveable and not need towing, see an
authorized dealer for service as soon as possible.
CAUTION!
Prolonged driving with the MIL on could cause

further damage to the emission control
system. It could also affect fuel economy and
driveability. The vehicle must be serviced
before any emissions tests can be performed.
If the MIL is flashing while the vehicle is

running, severe catalytic converter damage
and power loss will soon occur. Immediate
service is required.
O D S
NBOARD IAGNOSTIC YSTEM
C
YBERSECURITY
Your vehicle is required to have OBD II and a
connection port to allow access to information
related to the performance of your emissions
controls. Authorized service technicians may need
to access this information to assist with the
diagnosis and service of your vehicle and
emissions system.
GETTING TO KNOW YOUR INSTRUMENT PANEL
ONLY an authorized service technician should

connect equipment to the OBD II connection
port in order to read the VIN, diagnose, or
service your vehicle.
If unauthorized equipment is connected to

the OBD II connection port, such as a
driver-behavior tracking device, it may:
Be possible that vehicle systems,

including safety related systems, could be
impaired or a loss of vehicle control could
(OBD II)
occur that may result in an accident
involving serious injury or death.
Access, or allow others to access, infor-

mation stored in your vehicle systems,
including personal information.
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WARNING!
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