check engine light DODGE HORNET 2023 Owners Manual
[x] Cancel search | Manufacturer: DODGE, Model Year: 2023, Model line: HORNET, Model: DODGE HORNET 2023Pages: 288, PDF Size: 14.2 MB
Page 12 of 288

10  
Vehicle Security Warning Light 
Úpage 73
Yellow Warning Lights
Blind Spot Detection Fault Warning Light  
Úpage 74
Anti-Lock Brake System (ABS) Warning Light  
Úpage 74
Drowsy Driver Detected System Fault Warning Light  
Úpage 74
Electric Park Brake Warning Light  
Úpage 74
Electronic Stability Control (ESC) Active Warning Light  
Úpage 74
Electronic Stability Control (ESC) OFF Warning Light  
Úpage 74
Red Warning Lights
Fuel Cutoff Warning Light
 
Úpage 74
Fuel Cutoff Failure Warning Light  
Úpage 74
Fuel Level Sensor Failure Warning Light  
Úpage 74
Lane Keep Assist Warning Light  
Úpage 75
Service Lane Keep Assist Warning Light  
Úpage 75
Low Fuel Warning Light  
Úpage 75
Engine Check/Malfunction Indicator (MIL) Warning Light  
Úpage 75
Keyless Enter n’ Go™/Service Passive Entry Warning Light  
Úpage 75
Yellow Warning Lights
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16GETTING TO KNOW YOUR VEHICLE  
SENTRY KEY
The Sentry Key Immobilizer system prevents unauthorized 
vehicle operation by disabling the engine. The system 
does not need to be armed or activated. Operation is 
automatic, regardless of whether the vehicle is locked or 
unlocked.
The system uses a key fob, keyless push button ignition 
and a Radio Frequency (RF) receiver to prevent 
unauthorized vehicle operation. Therefore, only key fobs 
that are programmed to the vehicle can be used to start 
and operate the vehicle. The system cannot reprogram a 
key fob obtained from another vehicle.
After placing the ignition in the ON/RUN position, the 
Vehicle Security Light will turn on for three seconds for a 
bulb check. If the light remains on after the bulb check, it 
indicates that there is a problem with the electronics. In 
addition, if the light begins to flash after the bulb check, it 
indicates that someone attempted to start the engine with 
an invalid key fob. In the event that a valid key fob is used 
to start the engine but there is an issue with the vehicle 
electronics, the engine will start and shut off after two 
seconds.
If the Vehicle Security Light turns on during normal vehicle 
operation (vehicle running for longer than 10 seconds), it 
indicates that there is a fault in the electronics. Should 
this occur, have the vehicle serviced as soon as possible 
by an authorized dealer. All of the key fobs provided with your new vehicle have 
been programmed to the vehicle electronics  
Úpage 275.
NOTE:A key fob that has not been programmed is also 
considered an invalid key.
IGNITION SWITCH  
KEYLESS ENTER ‘N GO™ IGNITION
This feature allows the driver to operate the ignition with 
the push of a button as long as the key fob is in the 
passenger compartment.
The START/STOP ignition button has three operating 
modes. The three modes are: OFF, ON/RUN, and START.
START/STOP Ignition Button
The push button ignition can be placed in the following 
modes:
OFF
The engine is stopped.
 Some electrical devices (e.g., power locks, alarm, etc.) 
are still available.
ON/RUN
 Driving mode.
 All electrical devices are available (e.g., climate 
controls, heated seats, etc.).
START
 The engine will start.
CAUTION!
The Sentry Key Immobilizer system is not compatible 
with some aftermarket Remote Start systems. Use of 
these systems may result in vehicle starting problems 
and loss of security protection.
1 — OFF
2 — ON/RUN
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20GETTING TO KNOW YOUR VEHICLE  
REMOTE START ABORT MESSAGE — 
I
F EQUIPPED
One of the following messages will display in the 
instrument cluster display if the vehicle fails to remote 
start or exits Remote Start prematurely:
 Remote Start Aborted — Door Open
 Remote Start Aborted — Hood Open
 Remote Start Aborted — Fuel Low
 Remote Start Aborted — Liftgate Open
 Remote Start Aborted — Too Cold
 Remote Start Aborted — Time Expired
 Remote Start Disabled — Start Vehicle To Reset
The message will stay active until the ignition is placed in 
the ON/RUN position.
VEHICLE SECURITY SYSTEM — IF EQUIPPED   
The Vehicle Security system monitors the vehicle doors, 
hood, liftgate, and the Keyless Enter ‘n Go™ Ignition for 
unauthorized operation. It also monitors movement inside 
the passenger compartment (volumetric protection —
if equipped), cutting of battery cables, and unexpected 
lifting/tilting of the vehicle (anti-lift protection — 
if equipped). If something triggers the system, the Vehicle Security 
system will provide the following audible and visible 
signals:
The horn will pulse
 The turn signals will flash
NOTE:
The Vehicle Security system is activated by the Engine 
Immobilizer system, which is automatically activated 
when you get out of the vehicle with the key fob and 
lock the doors.
 The Vehicle Security system is factory adjusted to stan -
dards from different countries.
 The Vehicle Security system is a complementary secu -
rity system developed to hinder the occurrence of 
vehicle theft and prevent vandalism. It does not 
prevent the theft of your vehicle; the system is a deter -
rent.
TO ARM THE SYSTEM 
Follow these steps to arm the Vehicle Security system:
1. Make sure the vehicle’s ignition is placed in the  OFF position.
 For vehicles equipped with Keyless Entry, make 
sure the vehicle’s keyless ignition system is OFF. 2. Perform one of the following methods to lock the 
vehicle:
 Push the lock button on the interior power door 
lock switch with the driver and/or passenger door 
open.
 Push the lock button on the exterior Passive Entry 
door handle with a valid key fob available in the 
same exterior zone  
Úpage 23.
 Push the lock button on the key fob.
3. If any doors (or liftgate) are open, close them.
When the Vehicle Security system is armed (except on 
some versions for specific markets), the system will emit 
an acoustic warning and a warning light (located next to 
the interior door handle) will flash until it is disarmed.
NOTE:
 If there is a fault with the system, the system will emit 
an acoustic signal a second time.
 If this occurs, wait about 4 seconds and switch off the 
Vehicle Security system following this procedure: 
a. Press the unlock button on the key fob.
b. Check that the doors, hood, and liftgate are  closed, and then reactivate the system by pressing 
the lock button.
 If the alarm emits a sound even when the doors, hood, 
and liftgate are closed, there is a fault with the system. 
Contact an authorized dealer for assistance.
 The vehicle doors can be locked without arming the 
Vehicle Security system by using the emergency key in 
the exterior door lock cylinder.
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GETTING TO KNOW YOUR INSTRUMENT PANEL71
The battery was recently replaced and was not charged 
completely.
 The battery was discharged by an electrical load left on 
when the vehicle was parked.
 The battery was used for an extended period with the 
engine not running to supply radio, lights, chargers, 
+12 Volts portable appliances like vacuum cleaners, 
game consoles and similar devices.
What to do when an electrical load reduction action 
message is present (“Battery Saver On” or
“Battery Saver Mode”)
During a trip:
 Reduce power to unnecessary loads if possible:
 Turn off redundant lights (interior or exterior)
 Check what may be plugged into power outlets 
+12 Volts, 150W, USB ports
 Check HVAC settings (blower, temperature)
 Check the audio settings (volume)
After a trip:
 Check if any aftermarket equipment was installed 
(additional lights, upfitter electrical accessories, 
audio systems, alarms) and review specifications if any 
(load and Ignition Off Draw currents).
 Evaluate the latest driving cycles (distance, driving 
time and parking time).
 The vehicle should have service performed if the 
message is still present during consecutive trips and 
the evaluation of the vehicle and driving pattern did not 
help to identify the cause.WARNING LIGHTS AND MESSAGES
The warning/indicator lights will illuminate in the 
instrument panel together with a dedicated message and/
or acoustic signal when applicable. These indications are 
indicative and precautionary and as such must not be 
considered as exhaustive and/or alternative to the 
information contained in the Owner’s Manual, which you 
are advised to read carefully in all cases. Always refer to 
the information in this chapter in the event of a failure 
indication. All active telltales will display first if applicable. 
The system check menu may appear different based upon 
equipment options and current vehicle status. Some 
telltales are optional and may not appear.
RED WARNING LIGHTS
Air Bag Warning Light
This warning light will illuminate to indicate a 
fault with the air bag, and will turn on for four to 
eight seconds as a bulb check when the 
ignition is placed in the ON/RUN position. This 
light will illuminate with a single chime when a fault with 
the air bag has been detected, it will stay on until the fault 
is cleared. If the light is either not on during startup, stays 
on, or turns on while driving, have the system inspected at 
an authorized dealer as soon as possible.
Brake Warning Light  
This warning light monitors various brake 
functions, including brake fluid level and 
parking brake application. If the brake light 
turns on it may indicate that the parking brake 
is applied, that the brake fluid level is low, or that there is 
a problem with the Anti-Lock Brake System reservoir. If the light remains on when the parking brake has been 
disengaged, and the fluid level is at the full mark on the 
master cylinder reservoir, it indicates a possible brake 
hydraulic system malfunction or that a problem with the 
Brake Booster has been detected by the Anti-Lock Brake 
System (ABS) / Electronic Stability Control (ESC) system. 
In this case, the light will remain on until the condition has 
been corrected. If the problem is related to the brake 
booster, the ABS pump will run when applying the brake, 
and a brake pedal pulsation may be felt during each stop.
The dual brake system provides a reserve braking capacity 
in the event of a failure to a portion of the hydraulic 
system. A leak in either half of the dual brake system is 
indicated by the Brake Warning Light, which will turn on 
when the brake fluid level in the master cylinder has 
dropped below a specified level.
The light will remain on until the cause is corrected.
NOTE:The light may flash momentarily during sharp cornering 
maneuvers, which change fluid level conditions. The 
vehicle should have service performed, and the brake 
fluid level checked.
If brake failure is indicated, immediate repair is necessary.
WARNING!
Driving a vehicle with the red brake light on is 
dangerous. Part of the brake system may have failed. 
It will take longer to stop the vehicle. You could have a 
collision. Have the vehicle checked immediately.
3
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72GETTING TO KNOW YOUR INSTRUMENT PANEL  
Vehicles equipped with the Anti-Lock Brake System (ABS) 
are also equipped with Electronic Brake Force Distribution 
(EBD). In the event of an EBD failure, the Brake Warning 
Light will turn on along with the ABS Light. Immediate 
repair to the ABS system is required.
Operation of the Brake Warning Light can be checked by 
turning the ignition switch from the OFF position to the 
ON/RUN position. The light should illuminate for 
approximately two seconds. The light should then turn off 
unless the parking brake is applied or a brake fault is 
detected. If the light does not illuminate, have the light 
inspected by an authorized dealer.
The light also will turn on when the parking brake is 
applied with the ignition switch in the ON/RUN position.
NOTE:This light shows only that the parking brake is applied. 
It does not show the degree of brake application.
Battery Charge Warning Light  
This warning light will illuminate when the 
battery is not charging properly. If it stays on 
while the engine is running, there may be a 
malfunction with the charging system. 
Contact an authorized dealer as soon as possible.
This indicates a possible problem with the electrical 
system or a related component.
Door Open Warning Light   
This indicator will illuminate when a door is 
ajar/open and not fully closed.
NOTE:If the vehicle is moving, there will also be a single chime.
Drowsy Driver Detected Warning Light — 
If Equipped
Driver drowsiness detection helps to avoid 
crashes caused by fatigue by advising drivers 
to take a break in time. Once Drowsy Driver is 
detected, A pop-up will display continuously 
until the driver presses the  Thumbwheel button to clear.
Once the pop-up message is cleared, it is stored until the 
condition is no longer true.
Electric Power Steering (EPS) Fault 
Warning Light
This warning light will turn on when there's a 
fault with the EPS system  Úpage 88.
Electronic Throttle Control (ETC) Warning 
Light  
This warning light will illuminate to indicate a 
problem with the ETC system. If a problem is 
detected while the vehicle is running, the light 
will either stay on or flash depending on the 
nature of the problem. Cycle the ignition when the vehicle 
is safely and completely stopped and the transmission is 
placed in the PARK position. The light should turn off. If the 
light remains on with the vehicle running, your vehicle will 
usually be drivable; however, see an authorized dealer for 
service as soon as possible.
NOTE:This light may turn on if the accelerator and brake pedals 
are pressed at the same time.
If the light continues to flash when the vehicle is running, 
immediate service is required and you may experience 
reduced performance, an elevated/rough idle, or engine 
stall and your vehicle may require towing. The light will 
come on when the ignition is placed in the ON/RUN 
position and remain on briefly as a bulb check. If the light 
does not come on during starting, have the system 
checked by an authorized dealer.
WARNING!
Continued operation with reduced assist could pose a 
safety risk to yourself and others. Service should be 
obtained as soon as possible.
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GETTING TO KNOW YOUR INSTRUMENT PANEL73
Engine Coolant Temperature Warning 
Light
This warning light will illuminate to warn of an 
overheated engine condition. If the engine 
coolant temperature is too high, this light will 
illuminate and a single chime will sound.
If the light turns on while driving, safely pull over and stop 
the vehicle. If the Air Conditioning (A/C) system is on, turn 
it off. Also, shift the transmission into NEUTRAL (N) and 
idle the vehicle. If the temperature reading does not return 
to normal, turn the engine off immediately and call for 
service  
Úpage 218.
Hood Open Warning Light
This warning light will illuminate when the
hood is left open and not fully closed.
NOTE:If the vehicle is moving, there will also be a single chime.
Liftgate Open Warning Light   
This warning light will illuminate when the 
liftgate is open.
NOTE:If the vehicle is moving, there will also be a single chime.
Oil Pressure Warning Light  
This warning light will illuminate to indicate low 
engine oil pressure. If the light turns on while 
driving, stop the vehicle, shut off the engine as 
soon as possible, and contact an authorized 
dealer. A chime will sound when this light turns on.
Do not operate the vehicle until the cause is corrected. 
This light does not indicate how much oil is in the engine. 
The engine oil level must be checked under the hood.
Oil Temperature Warning Light
This warning light will illuminate to indicate the 
engine oil temperature is high. If the light turns 
on while driving, stop the vehicle and shut off 
the engine as soon as possible. Wait for oil 
temperature to return to normal levels.
Seat Belt Reminder Warning Light  
This warning light indicates when the driver or 
passenger seat belt is unbuckled. When the 
ignition is first placed in the ON/RUN position 
and if the driver’s seat belt is unbuckled, a 
chime will sound and the light will turn on. When driving, if 
the driver or front passenger seat belt remains unbuckled, 
the Seat Belt Reminder Light will flash or remain on 
continuously and a chime will sound  
Úpage 168.
Transmission Fault Warning Light —
If Equipped
 This light will illuminate (together with a 
message in the instrument cluster display and 
a buzzer) to indicate a transmission fault. 
Contact an authorized dealer if the message 
remains after restarting the engine.
Vehicle Security Warning Light —
If Equipped  
This light will flash at a fast rate for 
approximately 15 seconds when the Vehicle 
Security system is arming, and then will flash 
slowly until the vehicle is disarmed.
YELLOW WARNING LIGHTS
Auto Liftgate Fault Warning Light — 
If Equipped
This warning light will illuminate to signal when 
there is a fault detected with the Auto Liftgate.
WARNING!
A hot engine cooling system is dangerous. You or others 
could be badly burned by steam or boiling coolant. It is 
recommended to call an authorized dealer for service if 
your vehicle overheats  
Úpage 233.
CAUTION!
Driving with a hot engine cooling system could damage 
your vehicle. If the temperature gauge reads “H”, pull 
over and stop the vehicle. Idle the vehicle with the air 
conditioner turned off until the pointer drops back into 
the normal range. If the pointer remains on the “H”, 
turn the engine off immediately and call an authorized 
dealer for service.
3
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GETTING TO KNOW YOUR INSTRUMENT PANEL75
Lane Keep Assist Warning Light —
If Equipped
The Lane Keep Assist Warning Light will be 
solid yellow when the vehicle is approaching a 
lane marker. The warning light will flash when 
the vehicle is crossing the lane marker.
Service Lane Keep Assist Warning Light — 
If Equipped
This warning light will illuminate when the Lane 
Keep Assist system is not operating and 
requires service. Please see an authorized 
dealer.
Low Fuel Warning Light  
The Low Fuel Warning Light will turn on when 
low fuel is detected in the fuel tank.
Engine Check/Malfunction Indicator (MIL) 
Warning Light  
The MIL is a part of an Onboard Diagnostic 
System called OBD II that monitors engine and 
automatic transmission control systems. This 
warning light will illuminate when the ignition is 
in the ON/RUN position before engine start. If the bulb 
does not come on when turning the ignition switch from 
OFF to ON/RUN, have the condition checked promptly. Certain conditions, such as a loose or missing gas cap, 
poor quality fuel, etc., may illuminate the light after engine 
start. The vehicle should be serviced if the light stays on 
through several typical driving styles. In most situations, 
the vehicle will drive normally and will not require towing.
When the engine is running, the MIL may flash to alert 
serious conditions that could lead to immediate loss of 
power or severe catalytic converter damage. The vehicle 
should be serviced by an authorized dealer as soon as 
possible if this occurs.
Keyless Enter n’ Go™/Service Passive 
Entry Warning Light
The telltale will illuminate in the event of 
keyless system failure.
Contact an authorized dealer as soon as possible.
Service Forward Collision Warning (FCW) 
Light — If Equipped
This warning light will illuminate to indicate a 
fault in the Forward Collision Warning System. 
Contact an authorized dealer for service  
Úpage 162.
Service Stop/Start System Warning Light — 
If Equipped
This warning light will illuminate when the 
Stop/Start system is not functioning properly 
and service is required. Contact an authorized 
dealer for service.
Tire Pressure Monitoring System (TPMS) 
Warning Light — If Equipped
The warning light switches on and a message is 
displayed to indicate that the tire pressure is 
lower than the recommended value and/or 
that slow pressure loss is occurring. In these 
cases, optimal tire duration and fuel consumption may not 
be guaranteed.
Should one or more tires be in the condition mentioned 
previously, the display will show the indications 
corresponding to each tire.
WARNING!
A malfunctioning catalytic converter can reach higher 
temperatures than in normal operating conditions. 
This can cause a fire if you drive slowly or park over 
flammable substances such as dry plants, wood, 
cardboard, etc. This could result in death or serious 
injury to the driver, occupants or others.
CAUTION!
Prolonged driving with the Malfunction Indicator Light 
(MIL) on could cause damage to the vehicle control 
system. It also could affect fuel economy and 
driveability. If the MIL is flashing, severe catalytic 
converter damage and power loss will soon occur. 
Immediate service is required.
3
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76GETTING TO KNOW YOUR INSTRUMENT PANEL  
Each tire, including the spare (if provided), should be 
checked monthly when cold and inflated to the inflation 
pressure recommended by the vehicle manufacturer on 
the vehicle placard or tire inflation pressure label. If your 
vehicle has tires of a different size than the size indicated 
on the vehicle placard or tire inflation pressure label, you 
should determine the proper tire inflation pressure for 
those tires.
As an added safety feature, your vehicle has been equipped 
with a TPMS that illuminates a low tire pressure telltale 
when one or more of your tires is significantly underinflated. 
Accordingly, when the low tire pressure telltale illuminates, 
you should stop and check your tires as soon as possible, 
and inflate them to the proper pressure. Driving on a 
significantly underinflated tire causes the tire to overheat 
and can lead to tire failure. Underinflation also reduces fuel 
efficiency and tire tread life, and may affect the vehicle’s 
handling and stopping ability.
Please note that the TPMS is not a substitute for proper 
tire maintenance, and it is the driver’s responsibility to 
maintain correct tire pressure, even if underinflation has 
not reached the level to trigger illumination of the TPMS 
low tire pressure telltale. Your vehicle has also been equipped with a TPMS 
malfunction indicator to indicate when the system is not 
operating properly. The TPMS malfunction indicator is 
combined with the low tire pressure telltale. When the 
system detects a malfunction, the telltale will flash for 
approximately one minute and then remain continuously 
illuminated. This sequence will continue upon subsequent 
vehicle start-ups as long as the malfunction exists. When 
the malfunction indicator is illuminated, the system may 
not be able to detect or signal low tire pressure as 
intended. TPMS malfunctions may occur for a variety of 
reasons, including the installation of replacement or 
alternate tires or wheels on the vehicle that prevent the 
TPMS from functioning properly. Always check the TPMS 
malfunction telltale after replacing one or more tires or 
wheels on your vehicle to ensure that the replacement or 
alternate tires and wheels allow the TPMS to continue to 
function properly.
Towing Hook Breakdown Warning Light — 
If Equipped
This light illuminates when there is a failure 
with the tow hook. Contact an authorized 
dealer for service.
Traffic Sign Recognition (TSR) Fault 
Warning Light
This light will illuminate to indicate a TSR fault. 
Contact an authorized dealer if the light 
remains on after restarting the engine.
Transmission Temperature Warning Light
This warning light will illuminate to warn of a 
high transmission fluid temperature. This may 
occur with strenuous usage such as trailer 
towing. If this light turns on, stop the vehicle 
and run the engine at idle or slightly faster, with the 
transmission in PARK or NEUTRAL, until the light turns off. 
Once the light turns off, you may continue to drive 
normally.
CAUTION!
Do not continue driving with one or more flat tires as 
handling may be compromised. Stop the vehicle, 
avoiding sharp braking and steering. If a tire puncture 
occurs, repair immediately using the dedicated tire 
repair kit and contact an authorized dealer as soon
as possible.
CAUTION!
The TPMS has been optimized for the original 
equipment tires and wheels. TPMS pressures and 
warning have been established for the tire size 
equipped on your vehicle. Undesirable system 
operation or sensor damage may result when using 
replacement equipment that is not of the same size, 
type, and/or style. Aftermarket wheels can cause 
sensor damage. Using aftermarket tire sealants may 
cause the Tire Pressure Monitoring System (TPMS) 
sensor to become inoperable. After using an 
aftermarket tire sealant it is recommended that you 
take your vehicle to an authorized dealer to have your 
sensor function checked.
WARNING!
If you continue operating the vehicle when the 
Transmission Temperature Warning Light is illuminated 
you could cause the fluid to boil over, come in contact 
with hot engine or exhaust components and cause a 
fire.
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GETTING TO KNOW YOUR INSTRUMENT PANEL77
YELLOW INDICATOR LIGHTS
Exterior Lights Failure Indicator Light
The telltale will illuminate to indicate a failure 
on the following lights: Daytime Running Lights 
(DRL)/parking lights/trailer turn signal 
indicators (if present)/trailer lights (if present)/
side lights/turn signal indicators/low beam/reversing 
light/brake lights/license plate lights.
The failure may be caused by a blown bulb or an 
interruption of the electrical connection. For bulb 
replacement  
Úpage 246.
Forward Collision Warning (FCW) Indicator 
Light — If Equipped
This telltale will turn on to warn you of a 
possible collision with the vehicle in front of 
you.
Forward Collision Warning (FCW) OFF 
Indicator Light — If Equipped
This indicator light illuminates to indicate that 
Forward Collision Warning is off.
Immobilizer Fail / VPS Electrical Alarm 
Warning Light
This telltale will illuminate when the vehicle 
security system has detected an attempt to 
break into the vehicle.
NOTE:After cycling the ignition to the ON/RUN position, the 
Vehicle Security Warning Light could illuminate if a 
problem with the system is detected. This condition will 
result in the engine being shut off after two seconds.
GREEN INDICATOR LIGHTS
Active Speed Limiter SET Indicator Light
This indicator light will illuminate when the 
Active Speed Limiter is on and set to a specific 
speed  
Úpage 90.
Cruise Control SET Indicator Light  
This indicator light will illuminate when the 
Cruise Control is set to the desired speed  
Úpage 92.
Hold’n Go Indicator Light —
If Equipped
Hold’n Go keeps your vehicle at a complete 
stop without you having to keep your foot 
on the brake pedal. Once engaged a green 
HOLD indicator will appear in the Instrument 
Cluster Display.
Automatic Low Beam Indicator Light — 
If Equipped
This indicator appears when the automatic low 
beam headlights are on  Úpage 40.
Parking/Headlights On Indicator Light 
This indicator light will illuminate when the 
parking lights or headlights are turned on.
Turn Signal Indicator Lights  
When the left or right turn signal is activated, 
the turn signal indicator will flash 
independently and the corresponding 
exterior turn signal lamps will flash. Turn 
signals can be activated when the multifunction lever is 
moved down (left) or up (right).
NOTE:Check for an inoperative outside light bulb if either indi -
cator flashes at a rapid rate.
Stop/Start Active Indicator Light — 
If Equipped
This indicator light will illuminate when the 
Stop/Start function is in “Autostop” mode.
CAUTION!
Continuous driving with the Transmission Temperature 
Warning Light illuminated will eventually cause severe 
transmission damage or transmission failure.
3
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GETTING TO KNOW YOUR INSTRUMENT PANEL79
ONBOARD DIAGNOSTIC SYSTEM (OBD II) 
C
YBERSECURITY
Your vehicle is required to have an 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.
EMISSIONS INSPECTION AND 
MAINTENANCE PROGRAMS  
In some localities, it may be a legal requirement to pass an 
inspection of your vehicle's emissions control system. 
Failure to pass could prevent vehicle registration.
For states that require an Inspection and 
Maintenance (I/M), this check verifies the 
Malfunction Indicator Light (MIL) is functioning 
and is not on when the engine is running, and 
that the OBD II system is ready for testing.
Normally, the OBD II system will be ready. The OBD II 
system may  not be ready if your vehicle was recently 
serviced, recently had a depleted battery or a battery 
replacement. If the OBD II system should be determined 
not ready for the I/M test, your vehicle may fail the test.
Your vehicle has a simple ignition actuated test, which you 
can use prior to going to the test station. To check if your 
vehicle's OBD II system is ready, you must do the following:
1. Cycle the ignition switch to the ON position, but do  not crank or start the engine.
NOTE:If you crank or start the engine, you will have to start this 
test over. 2. As soon as you cycle the ignition switch to the 
ON position, you will see the Malfunction Indicator 
Light (MIL) symbol come on as part of a normal 
bulb check.
3. Approximately 15 seconds later, one of two things will  happen:
 The MIL will flash for about 10 seconds and then 
return to being fully illuminated until you turn OFF 
the ignition or start the engine. This means that 
your vehicle's OBD II system is  not ready and you 
should  not proceed to the I/M station.
 The MIL will not flash at all and will remain fully illu -
minated until you place the ignition in the off posi -
tion or start the engine. This means that your 
vehicle's OBD II system is  ready and you can 
proceed to the I/M station.
If your OBD II system is  not ready, you should see an 
authorized dealer or repair facility. If your vehicle was 
recently serviced or had a battery failure or replacement, 
you may need to do nothing more than drive your vehicle 
as you normally would in order for your OBD II system to 
update. A recheck with the previously mentioned test 
routine may then indicate that the system is  now ready.
Regardless of whether your vehicle's OBD II system is 
ready or not, if the MIL is illuminated during normal vehicle 
operation you should have your vehicle serviced before 
going to the I/M station. The I/M station can fail your 
vehicle because the MIL is on with the engine running.
WARNING!
 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 occur that may 
result in an accident involving serious injury or 
death.
 Access, or allow others to access, information 
stored in your vehicle systems, including 
personal information.
3
23_GG_OM_EN_USC_t.book  Page 79