2023 DODGE HORNET engine overheat

STARTING AND OPERATING95
To Cancel
The following conditions cancel ACC:
The brake pedal is applied
 The CANC (cancel) button is pushed
 The Anti-Lock Brake System (ABS) activates
 The gear selector is removed from the DRIVE position
 The Electronic Stability Control/Traction Control
System (ESC/TCS) activates
 The vehicle parking brake is applied
 The Trailer Sway Control (TSC) activates
 The driver switches ESC to Full Off mode
 The braking temperature exceeds normal range
(overheated)
 Driver seat belt is unbuckled at low speeds
 Driver door is opened at low speeds
To Turn Off
The system will turn off and clear the set speed in memory
if:
The Mode button is pushed
 The ignition is placed in the OFF position
To Resume
If ACC was canceled, and there is a set speed in memory,
push the RES (resume) button and remove your foot from
the accelerator pedal. The instrument cluster display will
show the last set speed. Resume can be used at any speed above 0 mph (0 km/h)
when ACC is active.
NOTE:ACC cannot be resumed if there is a stationary vehicle in
front of your vehicle in close proximity.
To Vary The Speed Setting
To Increase Or Decrease The Set Speed
After setting a speed, you can adjust the speed by pushing
the SET switch upward or decrease the speed by pushing
the SET switch downward.
U.S. Speed (mph)

Pushing the SET switch upward or downward to the first
detent will result in a 1 mph speed adjustment. Each
subsequent movement of the switch to the first detent
will result in an adjustment of 1 mph.
 If the switch is pushed upward or downward briefly to
the second detent, the set speed will adjust in 5 mph
increments. The new set speed is reflected in the
instrument cluster display. 
If the switch is held upward or downward, the set speed
will continue to adjust until the switch is released.
Metric Speed (km/h)
 Pushing the SET switch upward or downward to the first
detent will result in a 1 km/h speed adjustment. Each
subsequent movement of the switch to the first detent
will result in an adjustment of 1 km/h.

 If the switch is pushed upward or downward briefly to
the second detent, the set speed will adjust in 10 km/h
increments. The new set speed is reflected in the instru -
ment cluster display.

 If the switch is held upward or downward, the set speed
will continue to adjust until the switch is released.
NOTE:
When you override the set speed by pushing the SET
switch upward or downward, the new set speed will be
the current speed of the vehicle.
 When you use the SET switch to decelerate, if the
engine’s braking power does not slow the vehicle suffi -
ciently to reach the set speed, the brake system will
automatically slow the vehicle.
 The ACC system maintains set speed when driving
uphill and downhill. However, a slight speed change on
moderate hills is normal. In addition, downshifting may
occur while climbing uphill or descending downhill. This
is normal operation and necessary to maintain set
speed. When driving uphill and downhill, the ACC
system will cancel if the braking temperature exceeds
normal range (overheated).
WARNING!
The Resume function should only be used if traffic and
road conditions permit. Resuming a set speed that is
too high or too low for prevailing traffic and road
conditions could cause the vehicle to accelerate or
decelerate too sharply for safe operation. Failure to
follow these warnings can result in a collision and death
or serious personal injury.
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212IN CASE OF EMERGENCY
(Continued)
INFLATION PROCEDURENOTE:Always follow applicable state and provincial laws. Contact
state and provincial Highway Safety offices for additional
details.
To use your Tire Inflator Kit, proceed as follows:

1. Stop the vehicle in a position where you can repair
the tire safely. Activate the Hazard Warning Flashers
to make other drivers aware of your presence.

2. If equipped, use all available safety equipment required by law.
3. Verify that the valve stem (on the wheel with the deflated tire) is in a position that is near to the
ground. This will allow the Tire Inflator Kit hoses to
reach the valve stem and keep the tire repair kit flat
on the ground.
4. Place the gear selector to PARK (P).
5. Apply the Electric Park Brake and cycle the engine OFF.
6. Insert the sealant cartridge containing the sealing fluid in the proper compressor holder, pushing down
hard. Unscrew the tire valve cap, take out the filler
tube and tighten the fitting on the tire valve.
WARNING!
The information required by current legislation is
shown on the kit cartridge label. Read the cartridge
label before use, avoid improper use.
 Do not attempt to seal a tire on the side of the
vehicle closest to traffic. Pull far enough off the
road to avoid the danger of being hit when using
the Tire Service Kit.
 Do not remove foreign bodies from the tire.
 Do not leave the compressor running for more than
20 minutes, this may cause overheating.
 Do not use the Tire Service Kit or drive the vehicle
under the following circumstances:
 If the puncture in the tire tread is approximately
1/4 inch (6 mm) or larger.
 If the tire has any sidewall damage.
 If the tire has any damage from driving with
extremely low tire pressure.
 If the tire has any damage from driving on a
flat tire.
 If the wheel has any damage.
 If you are unsure of the condition of the tire or
the wheel.
Keep the Tire Service Kit away from open flames or
heat sources.
 A loose Tire Service Kit thrown forward in a collision
or hard stop could endanger the occupants of the
vehicle. Always stow the Tire Service Kit in the place
provided. Failure to follow these warnings can result
in injuries that are serious or fatal to you, your
passengers, and others around you.
 Take care not to allow the contents of the Tire
Service Kit to come in contact with hair, eyes, or
clothing. Tire Service Kit sealant is harmful if inhaled,
swallowed, or absorbed through the skin. It causes
skin, eye, and respiratory irritation. Flush immedi -
ately with plenty of water if there is any contact with
eyes or skin. Change clothing as soon as possible, if
there is any contact with clothing.
 Tire Service Kit sealant solution contains latex. In
case of an allergic reaction or rash, consult a physi -
cian immediately. Keep the Tire Service Kit out of
reach of children. If swallowed, rinse mouth immedi -
ately with plenty of water and drink plenty of water.
Do not induce vomiting! Consult a physician immedi -
ately.
WARNING!

23_GG_OM_EN_USC_t.book Page 212

218IN CASE OF EMERGENCY
IF YOUR ENGINE OVERHEATS
If the vehicle is overheating, it will need to be serviced by
an authorized dealer.
Potential signs of vehicle overheating:
Temperature gauge is at HOT (H)
 Strong smell of coolant
 White smoke coming from engine or exhaust
 Coolant bottle coolant has bubbles present If the temperature gauge is moving towards or close to the
HOT (H) position, you can reduce the potential for
overheating by taking the appropriate action.

On highways — slow down.
 In city traffic — while stopped, place the transmission in
NEUTRAL (N), but do not increase the engine idle speed
while preventing vehicle motion with the brakes.
 If your Air Conditioner (A/C) is on, turn it off. The A/C
system adds heat to the engine cooling system and
turning the A/C off can help remove this heat.
 You can also turn the temperature control to maximum
heat, the mode control to floor and the blower control
to high. This allows the heater core to act as a supple -
ment to the radiator and aids in removing heat from the
engine cooling system.
GEAR SELECTOR OVERRIDE
If a malfunction occurs, and the gear selector cannot be
moved out of the PARK position, you can use the following
procedure to temporarily move the gear selector:

1. First turn the engine OFF.

2. Apply the parking brake.
3. Grab the boot material of the gear selector and pull up to carefully separate the gear selector bezel and
boot assembly from the center console.

Gear Selector Bezel

4. Press and maintain firm pressure on the brake pedal.
WARNING!
You or others can be badly burned by hot engine
coolant (antifreeze) or steam from your radiator. If you
see or hear steam coming from under the hood, do not
open the hood until the radiator has had time to cool.
Never try to open a cooling system pressure cap when
the radiator or coolant bottle is hot.
CAUTION!
Driving with a hot 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” and
you hear continuous chimes, turn the engine off
immediately and call for service.

23_GG_OM_EN_USC_t.book Page 218

IN CASE OF EMERGENCY219
5. Locate the gear selector override access (at the right
rear corner of the gear selector assembly). Using a
small screwdriver or similar tool, push and hold the
override release lever down.

Gear Selector Override Access Location

6. Move the gear selector to the NEUTRAL (N) position.
7. The vehicle may then be started in NEUTRAL.
8. Reinstall the gear selector boot.
FREEING A STUCK VEHICLE
If your vehicle becomes stuck in mud, sand or snow, it can
often be moved using a rocking motion. Turn the steering
wheel right and left to clear the area around the front
wheels. Push and hold the button on the gear selector.
Then shift back and forth between DRIVE (D) and
REVERSE (R) while gently pressing the accelerator.
NOTE:Shifts between DRIVE (D) and REVERSE (R) can only be
achieved at wheel speeds of 5 mph (8 km/h) or less.
Whenever the transmission remains in NEUTRAL (N) for
more than two seconds, you must press the brake pedal
to engage DRIVE (D) or REVERSE (R).
Use the least amount of accelerator pedal pressure that
will maintain the rocking motion without spinning the
wheels or racing the engine.
NOTE:Push the ESC OFF button (if necessary), to place the Elec -
tronic Stability Control (ESC) system in the “Off” mode,
before rocking the vehicle
Úpage 156. Once the vehicle
has been freed, push the ESC OFF button again to restore
“ESC On” mode.
WARNING!
Fast spinning tires can be dangerous. Forces generated
by excessive wheel speeds may cause damage, or even
failure, of the axle and tires. A tire could explode and
injure someone. Do not spin your vehicle's wheels
faster than 30 mph (48 km/h) or for longer than
30 seconds continuously without stopping when you
are stuck and do not let anyone near a spinning wheel,
no matter what the speed.
CAUTION!
 Racing the engine or spinning the wheels may lead to
transmission overheating and failure. Allow the
engine to idle with the transmission in NEUTRAL for
at least one minute after every five rocking-motion
cycles. This will minimize overheating and reduce the
risk of clutch or transmission failure during
prolonged efforts to free a stuck vehicle.
 When “rocking” a stuck vehicle by shifting between
DRIVE gear and REVERSE, do not spin the wheels
faster than 15 mph (24 km/h), or drivetrain damage
may result.
 Revving the engine or spinning the wheels too fast
may lead to transmission overheating and failure. It
can also damage the tires. Do not spin the wheels
above 30 mph (48 km/h) while in gear (no transmis -
sion shifting occurring).
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232SERVICING AND MAINTENANCE
Rear Wiper Blade Removal/Installation

1. Lift the rear wiper arm pivot cap away from the glass.

Wiper Pivot Cap

2. Remove the nut and remove the wiper arm from
the vehicle.

Wiper Pivot Cap In Unlocked Position

3. Install a new wiper arm, securely tighten the nut and put the cap back in place.
EXHAUST SYSTEM
The best protection against carbon monoxide entry into
the vehicle body is a properly maintained engine exhaust
system.
If you notice a change in the sound of the exhaust system;
or if exhaust fumes can be detected inside the vehicle; or
when the underside or rear of the vehicle is damaged;
have an authorized technician inspect the complete
exhaust system and adjacent body areas for broken,
damaged, deteriorated, or mispositioned parts. Open
seams or loose connections could permit exhaust fumes
to seep into the passenger compartment. In addition, have
the exhaust system inspected each time the vehicle is
raised for lubrication or oil changes. Replace as required.
1 — Wiper Arm Pivot Cap
1 — Wiper Arm
2 — Wiper Arm Nut
WARNING!

Exhaust gases can injure or kill. They contain carbon
monoxide (CO), which is colorless and odorless.
Breathing it can make you unconscious and can
eventually poison you
Úpage 199.
 A hot exhaust system can start a fire if you park over
materials that can burn, such materials might be
grass or leaves, and those items that come into
contact with your exhaust system. Do not park or
operate your vehicle in areas where your exhaust
system can contact anything that can burn.
CAUTION!
The catalytic converter requires the use of unleaded
fuel only. Leaded gasoline will destroy the effective -
ness of the catalyst as an emissions control device
and may seriously reduce engine performance and
cause serious damage to the engine.
 Damage to the catalytic converter can result if your
vehicle is not kept in proper operating condition.
In the event of engine malfunction, particularly
involving engine misfire or other apparent loss of
performance, have your vehicle serviced promptly.
Continued operation of your vehicle with a severe
malfunction could cause the converter to overheat,
resulting in possible damage to the converter and
vehicle.

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SERVICING AND MAINTENANCE233
Under normal operating conditions, the catalytic converter
will not require maintenance. However, it is important to
keep the engine properly tuned to ensure proper catalyst
operation and prevent possible catalyst damage.
NOTE:Intentional tampering with emissions control systems can
result in civil penalties being assessed against you.
In unusual situations involving grossly malfunctioning
engine operation, a scorching odor may suggest severe
and abnormal catalyst overheating. If this occurs, stop the
vehicle, turn off the engine and allow it to cool. Service,
including a tune-up to manufacturer specifications, should
be obtained immediately.
To minimize the possibility of catalytic converter damage:
Do not interrupt the ignition when the transmission is
in gear and the vehicle is in motion.
 Do not try to start the vehicle by pushing or towing the
vehicle.
 Do not idle the engine with any ignition components
disconnected or removed, such as during diagnostic
testing, or for prolonged periods during very rough idle
or malfunctioning operating conditions.
COOLING SYSTEM
Coolant Checks
Check engine coolant (antifreeze) protection every
12 months (before the onset of freezing weather, where
applicable). If the engine coolant is dirty or rusty in
appearance, the system should be drained, flushed and
refilled with fresh engine coolant. Check the front of
the A/C condenser for any accumulation of bugs, leaves,
etc. If dirty, clean by gently spraying water from a garden
hose vertically down the face of the condenser.
Cooling System — Drain, Flush And Refill
Some vehicles require special tools to add coolant
properly. Failure to fill these systems properly could lead
to severe internal engine damage. If any coolant is needed
to be added to the system please contact an authorized
dealer.
If the engine coolant (antifreeze) is dirty or contains visible
sediment, have an authorized dealer clean and flush with
OAT coolant (conforming to MS.90032).
Refer to the Maintenance Plan for the proper
maintenance intervals
Úpage 224.
Selection Of Coolant
For further information Úpage 269.
NOTE:
Mixing of engine coolant (antifreeze) other than speci-
fied Organic Additive Technology (OAT) engine coolant,
may result in engine damage and may decrease corro -
sion protection. OAT engine coolant is different and
should not be mixed with Hybrid Organic Additive Tech -
nology (HOAT) engine coolant or any “globally compat -
ible” coolant. If a non-OAT engine coolant is introduced
into the cooling system in an emergency, the cooling
system will need to be drained, flushed, and refilled
with fresh OAT coolant (conforming to MS.90032), by
an authorized dealer as soon as possible.

 Do not use water alone or alcohol-based engine coolant
products. Do not use additional rust inhibitors or
anti-rust products, as they may not be compatible with
the radiator engine coolant and may plug the radiator.

WARNING!
You or others can be badly burned by hot engine
coolant (antifreeze) or steam from your radiator. If
you see or hear steam coming from under the hood,
do not open the hood until the radiator has had time
to cool. Never open a cooling system pressure cap
when the radiator or coolant bottle is hot.
 Keep hands, tools, clothing, and jewelry away from
the radiator cooling fan when the hood is raised. The
fan starts automatically and may start at any time,
whether the engine is running or not.
 When working near the radiator cooling fan, discon -
nect the fan motor lead or turn the ignition to the OFF
mode. The fan is temperature controlled and can
start at any time the ignition is in the ON mode.
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234SERVICING AND MAINTENANCE
This vehicle has not been designed for use with
propylene glycol-based engine coolant. Use of
propylene glycol-based engine coolant is not recom -
mended.
 Some vehicles require special tools to add coolant
properly. Failure to fill these systems properly could
lead to severe internal engine damage. If any coolant is
needed to be added to the system please contact an
authorized dealer.
Adding Coolant

Your vehicle has been built with an improved engine coolant
(OAT coolant conforming to MS.90032) that allows extended
maintenance intervals. This engine coolant (antifreeze) can
be used up to 10 years or 150,000 miles (240,000 km)
before replacement. To prevent reducing this extended
maintenance period, it is important to use the same engine
coolant (OAT coolant conforming to MS.90032) throughout
the life of your vehicle.

Please review these recommendations for using OAT
engine coolant that meets the requirements of the
manufacturer Material Standard MS.90032. When adding
engine coolant:
We recommend using Mopar® Antifreeze/Coolant
10 Year/150,000 Mile (240,000 km) Formula OAT
that meets the requirements of the manufacturer
Material Standard MS.90032.
 Mix a minimum solution of 50% OAT engine coolant
that meets the requirements of the manufacturer
Material Standard MS.90032 and distilled water. Use higher concentrations (not to exceed 70%) if
temperatures below −34°F (−37°C) are anticipated.
Please contact an authorized dealer for assistance.
 Use only high purity water such as distilled or deionized
water when mixing the water/engine coolant solution.
The use of lower quality water will reduce the amount
of corrosion protection in the engine cooling system.
NOTE:
It is the owner's responsibility to maintain the proper
level of protection against freezing according to the
temperatures occurring in the area where the vehicle is
operated.
 Some vehicles require special tools to add coolant
properly. Failure to fill these systems properly could
lead to severe internal engine damage. If any coolant is
needed to be added to the system, please contact an
authorized dealer.
 Mixing engine coolant types is not recommended and
can result in cooling system damage. If HOAT and OAT
coolant are mixed in an emergency, have an authorized
dealer drain, flush, and refill with OAT coolant
(conforming to MS.90032) as soon as possible.
Cooling System Pressure Cap
The cap must be fully tightened to prevent loss of engine
coolant (antifreeze), and to ensure that engine coolant will
return to the radiator from the coolant expansion bottle/
recovery tank (if equipped). The cap should be inspected and cleaned if there is any
accumulation of foreign material on the sealing surfaces.
Disposal Of Used Coolant
Used ethylene glycol-based coolant (antifreeze) is a
regulated substance requiring proper disposal. Check with
your local authorities to determine the disposal rules for
your community. To prevent ingestion by animals or
children, do not store ethylene glycol-based coolant in
open containers or allow it to remain in puddles on the
ground. If ingested by a child or pet, seek emergency
assistance immediately. Clean up any ground spills
immediately.
WARNING!

Do not open a hot engine cooling system. Never add
engine coolant (antifreeze) when the engine is over -
heated. Do not loosen or remove the cap to cool an
overheated engine. Heat causes pressure to build up
in the cooling system. To prevent scalding or injury,
do not remove the pressure cap while the system is
hot or under pressure.
 Do not use a pressure cap other than the one speci -
fied for your vehicle. Personal injury or engine
damage may result.

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SERVICING AND MAINTENANCE235
Coolant Level
The coolant expansion bottle provides a quick visual
method for determining that the coolant level is adequate.
With the engine off and cold, the level of the engine
coolant (antifreeze) in the bottle should be between the
“MIN” and “MAX” marks.
As long as the engine operating temperature is
satisfactory, the coolant bottle need only be checked once
a month.
When additional engine coolant is needed to maintain the
proper level, it should be added to the coolant bottle.
Do not overfill.
Engine Coolant Level — 2.0L
With the engine OFF and cold, the level of the engine
coolant should be within the OK range between the
ADD and FULL range on the dipstick.

1. Remove the cap with level dipstick from the engine
coolant bottle.

2. Clean off the coolant from the dipstick.
3. Rest the cap on the opening of the coolant bottle without tightening the cap.
4. Remove the cap with dipstick and check the coolant level on the dipstick.
The radiator normally remains completely full, so there is
no need to remove the radiator/coolant pressure cap
unless checking for engine coolant freeze point or
replacing coolant. Advise your service attendant of this. As
long as the engine operating temperature is satisfactory,
the coolant bottle need only be checked once a month.
When additional engine coolant is needed to maintain the
proper level, only OAT coolant that meets the
requirements of the manufacturer Material Standard
MS.90032 should be added to the coolant bottle.
Do not overfill.
Cooling System Notes
NOTE:When the vehicle is stopped after a few miles/kilometers
of operation, you may observe vapor coming from the front
of the engine compartment. This is normally a result of
moisture from rain, snow, or high humidity accumulating on the radiator and being vaporized when the thermostat
opens, allowing hot engine coolant (antifreeze) to enter
the radiator.
If an examination of your engine compartment shows no
evidence of radiator or hose leaks, the vehicle may be
safely driven. The vapor will soon dissipate.

Do not overfill the coolant expansion bottle.
 Check the coolant freeze point in the radiator and in
the coolant expansion bottle. If engine coolant needs
to be added, the contents of the coolant expansion
bottle must also be protected against freezing.
 If frequent engine coolant additions are required, the
cooling system should be pressure tested for leaks.
 Maintain engine coolant concentration at a minimum
of 50% OAT coolant (conforming to MS.90032) and
distilled water for proper corrosion protection of your
engine which contains aluminum components.
 Make sure that the coolant expansion bottle overflow
hoses are not kinked or obstructed.
 Keep the front of the radiator clean. If your vehicle is
equipped with air conditioning, keep the front of the
condenser clean.
 Do not change the thermostat for Summer or Winter
operation. If replacement is ever necessary, install
ONLY the correct type thermostat. Other designs may
result in unsatisfactory engine cooling performance,
poor gas mileage, and increased emissions.
WARNING!
Do not open a hot engine cooling system. Never add
engine coolant (antifreeze) when the engine is over -
heated. Do not loosen or remove the cap to cool an
overheated engine. Heat causes pressure to build up
in the cooling system. To prevent scalding or injury,
do not remove the pressure cap while the system is
hot or under pressure.
 Do not use a pressure cap other than the one speci -
fied for your vehicle. Personal injury or engine
damage may result.
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