check engine DODGE HORNET 2023 Owner's Guide

236SERVICING AND MAINTENANCE
BRAKE SYSTEM
In order to ensure brake system performance, all brake
system components should be inspected periodically.
For the proper maintenance intervals
Úpage 224.
Brake Master Cylinder
The fluid in the master cylinder should be checked when
performing under hood services or immediately if the
Brake Warning Light is illuminated.
Be sure to clean the top of the master cylinder area before
removing the cap. If necessary, add fluid to bring the fluid
level up to the requirements described on the brake fluid
reservoir. With disc brakes, fluid level can be expected to
fall as the brake pads wear. Brake fluid level should be
checked when pads are replaced. However, low fluid level
may be caused by a leak and a checkup may be needed.
Use only the manufacturer recommended brake fluid
Úpage 269.
AUTOMATIC TRANSMISSION —
I
F EQUIPPED
Special Additives
It is strongly recommended against using any special
additives in the transmission. Automatic Transmission
Fluid (ATF) is an engineered product and its performance
may be impaired by supplemental additives. Therefore, do
not add any fluid additives to the transmission. Avoid
using transmission sealers as they may adversely affect
seals.
Fluid Level Check
The fluid level is preset at the factory and does not require
adjustment under normal operating conditions. Routine
fluid level checks are not required; therefore the
transmission has no dipstick. An authorized dealer can
check your transmission fluid level using special service
tools. If you notice fluid leakage or transmission
malfunction, visit an authorized dealer immediately to
have the transmission fluid level checked. Operating the
vehicle with an improper fluid level can cause severe
transmission damage.
WARNING!
Riding the brakes can lead to brake failure and possibly
a collision. Driving with your foot resting or riding on the
brake pedal can result in abnormally high brake
temperatures, excessive lining wear, and possible brake
damage. You would not have your full braking capacity
in an emergency.
WARNING!
 Use only the manufacturer recommended brake fluid Úpage 269. Using the wrong type of brake fluid can
severely damage your brake system and/or impair its
performance. The proper type of brake fluid for your
vehicle is also identified on the original factory
installed hydraulic master cylinder reservoir.
 To avoid contamination from foreign matter or
moisture, use only new brake fluid or fluid that has
been in a tightly closed container. Keep the master
cylinder reservoir cap secured at all times. Brake
fluid in an open container absorbs moisture from the
air resulting in a lower boiling point. This may cause
it to boil unexpectedly during hard or prolonged
braking, resulting in sudden brake failure.
This could result in a collision.
 Overfilling the brake fluid reservoir can result in
spilling brake fluid on hot engine parts, causing the
brake fluid to catch fire. Brake fluid can also damage
painted and vinyl surfaces, care should be taken to
avoid its contact with these surfaces.
 Do not allow petroleum-based fluid to contaminate
the brake fluid. Brake seal components could be
damaged, causing partial or complete brake failure.
This could result in a collision.
CAUTION!
Do not use chemical flushes in your transmission as the
chemicals can damage your transmission components.
Such damage is not covered by the New Vehicle Limited
Warranty.

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SERVICING AND MAINTENANCE237
Fluid And Filter Changes
Under normal operating conditions, the fluid installed at
the factory will provide satisfactory lubrication for the life
of the vehicle.
Routine fluid and filter changes are not required. However,
change the fluid and filter if the fluid becomes
contaminated (with water, etc.), or if the transmission is
disassembled for any reason.
Selection Of Lubricant
It is important to use the proper transmission fluid to
ensure optimum transmission performance and life.
Use only the manufacturer specified transmission fluid
Úpage 269. It is important to maintain the transmission
fluid at the correct level using the recommended fluid.
NOTE:No chemical flushes should be used in any transmission;
only the approved lubricant should be used.
FUSES
General Information
The fuses protect electrical systems against excessive
current.
When a device does not work, you must check the fuse
element inside the blade fuse for a break/melt.
Also, please be aware that using power outlets for
extended periods of time with the engine off may result in
vehicle battery discharge.

Blade Fuses

CAUTION!
If a transmission fluid leak occurs, visit an authorized
dealer immediately. Severe transmission damage may
occur. An authorized dealer has the proper tools to
adjust the fluid level accurately.
CAUTION!
Using a transmission fluid other than the manufacturer
recommended fluid may cause deterioration in
transmission shift quality and/or torque converter
shudder. For fluid specifications
Úpage 269.
WARNING!

When replacing a blown fuse, always use an appro -
priate replacement fuse with the same amp rating as
the original fuse. Never replace a fuse with another
fuse of higher amp rating. Never replace a blown
fuse with metal wires or any other material. Do not
place a fuse inside a circuit breaker cavity or vice
versa. Failure to use proper fuses may result in
serious personal injury, fire and/or property damage.
 Before replacing a fuse, make sure that the ignition
is off and that all the other services are switched off
and/or disengaged.
 If the replaced fuse blows again, contact an autho -
rized dealer.
 If a general protection fuse for safety systems
(air bag system, braking system), power unit systems
(engine system, transmission system) or steering
system blows, contact an authorized dealer.
1 — Fuse Element
2 — Blade Fuse with a good/functional fuse element
3 — Blade Fuse with a bad/not functional fuse element
(blown fuse)
8

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265
TECHNICAL SPECIFICATIONS
VEHICLE IDENTIFICATION NUMBER (VIN)
The VIN is found on the left front corner of the windshield
and is visible from outside of the vehicle.

Vehicle Identification Number

NOTE:
It is illegal to remove or alter the VIN.
BRAKE SYSTEM
Your vehicle is equipped with power assisted brakes as
standard equipment. In the event power assist is lost for
any reason (for example, repeated brake applications with
the engine off), the brakes will still function. However, the
effort required to brake the vehicle will be much greater
than that required with the power system operating. If either of the two hydraulic systems lose normal
capability, the remaining system will still function with
some loss of overall braking effectiveness. This will be
evident by increased pedal travel during application and
greater pedal force required to slow or stop. In addition, if
the malfunction is caused by an internal leak, as the brake
fluid in the master cylinder drops, the Brake Warning Light
will illuminate.
WHEEL AND TIRE TORQUE SPECIFICATIONS
Proper lug nut/bolt torque is very important to ensure that
the wheel is properly mounted to the vehicle. Any time a
wheel has been removed and reinstalled on the vehicle,
the lug nuts/bolts should be torqued using a properly
calibrated torque wrench using a six-sided (hex) deep wall
socket.
TORQUE SPECIFICATIONS
**Use only authorized dealer recommended lug nuts/
bolts and clean or remove any dirt or oil before tightening.
Inspect the wheel mounting surface prior to mounting the
tire and remove any corrosion or loose particles.

Wheel Mounting Surface

WARNING!
Driving a vehicle with the Brake Warning Light on is
dangerous. A significant decrease in braking
performance or vehicle stability during braking may
occur. It will take you longer to stop the vehicle or will
make your vehicle harder to control. You could have a
collision. Have the vehicle checked immediately.
Lug Nut/Bolt
Torque
**Lug Nut/Bolt
SizeLug Nut/Bolt
Socket Size
88.5 ft-lb
(120 N·m) M12 x 1.25 17 mm
9

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266TECHNICAL SPECIFICATIONS
First tighten the lug nuts/bolts in a star pattern until each
nut/bolt has been tightened to 14.7 ft-lb (20 N·m). Then
repeat the operation until each lug nut/bolt has been
tightened to 88.5 ft-lb (120 N·m). Ensure that the socket is
fully engaged on the lug nut/bolt (do not insert it halfway).

Torque Pattern

After 25 miles (40 km), check the lug nut/bolt torque to be
sure that all the lug nuts/bolts are properly tightened.
FUEL REQUIREMENTS
While operating on gasoline with the required octane
number, hearing a light knocking sound from the engine is
not a cause for concern. However, if the engine is
heard making a heavy knocking sound, see a dealer
immediately. Use of gasoline with a lower than
recommended octane number can cause engine failure
and may void or not be covered by the New Vehicle Limited
Warranty.
2.0L ENGINE
This engine is designed to meet all emissions
requirements, and provide satisfactory fuel
economy and performance, when using
high-quality unleaded regular gasoline
having an octane rating of 87, as specified by the
(R+M)/2 method. The use of 91 or higher octane premium
gasoline will allow these engines to operate to optimal
performance. This increase in performance is most
noticeable in hot weather or under heavy load conditions
such as while towing.
REFORMULATED GASOLINE
Many areas of the country require the use of
cleaner-burning gasoline referred to as “reformulated
gasoline”. Reformulated gasoline contains oxygenates
and are specifically blended to reduce vehicle emissions
and improve air quality. The use of reformulated gasoline is recommended.
Properly blended reformulated gasoline will provide
improved performance and durability of engine and fuel
system components.
GASOLINE/OXYGENATE BLENDS
Some fuel suppliers blend unleaded gasoline with
oxygenates such as ethanol.
Problems that result from using gasoline containing more
than 15% ethanol (E-15) or gasoline containing methanol
are not the responsibility of the manufacturer and may
void the New Vehicle Limited Warranty.
WARNING!
To avoid the risk of forcing the vehicle off the jack, do
not tighten the lug nuts/bolts fully until the vehicle has
been lowered. Failure to follow this warning may result
in personal injury.
CAUTION!
DO NOT use E-85, gasoline containing methanol, or
gasoline containing more than 15% ethanol (E-15).
Use of these blends may result in starting and
drivability problems, damage critical fuel system
components, cause emissions to exceed the applicable
standard, and/or cause the Malfunction Indicator Light
to illuminate. Please observe pump labels as they
should clearly communicate if a fuel contains greater
than 15% ethanol (E-15).

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277
INDEX
AActive Driving Assist System ....................................... 101
Active Speed Limiter ....................................................... 90
Adaptive Cruise Control (ACC) ........................................92
Adding Engine Coolant (Antifreeze) ............................ 234
Additives, Fuel .............................................................. 267
Air Bag........................................................................... 176Air Bag Operation.................................................... 177
Air Bag Warning Light .................................... 176
, 178
Driver Knee Air Bag ................................................ 181
Enhanced Accident Response ...................... 184
, 222
Event Data Recorder (EDR).................................... 222 Front Air Bag ........................................................... 178
If Deployment Occurs ............................................. 184
Knee Impact Bolsters ............................................. 181
Maintaining Your Air Bag System .......................... 187
Maintenance ........................................................... 187
Redundant Air Bag Warning Light ......................... 176
Side Air Bags ........................................................... 181
Transporting Pets.................................................... 199
Air Bag Light ........................................................ 176
, 200
Air Cleaner, Engine (Engine Air Cleaner Filter) ........... 229
Air Conditioner Maintenance ...................................... 229
Air Conditioner Refrigerant ................................. 229
, 230
Air Conditioner System ................................................ 229
Air Conditioning ............................................................... 46
Air Conditioning Filter ........................................... 50
, 230
Air Conditioning, Operating Tips ..................................... 49 Air Filter......................................................................... 229 Air Pressure
Tires.......................................................................... 254
Alarm Arm The System......................................................... 20
Disarm The System ................................................... 21
Panic........................................................................... 13
Security Alarm..................................................... 20
, 73
Alarm System Security Alarm............................................................ 20
All Wheel Drive Towing ...................................................................... 221
All Wheel Drive (AWD)............................................88
, 221
Alterations/Modifications Vehicle.......................................................................... 8
Antifreeze (Engine Coolant) ............................... 233
, 268
Disposal ...................................................................234
Anti-Lock Brake System (ABS) ..................................... 154
Anti-Lock Warning Light.................................................. 74
Arming System Security Alarm............................................................ 20
Assist, Hill Start ............................................................. 158
Audio Systems (Radio) ................................................. 129
Auto Down Power Windows............................................ 55
Auto Hold ......................................................................... 84
Auto Liftgate Fault Warning Light .................................. 73
Automatic Dimming Mirror ............................................. 34 Automatic Door Locks .................................................... 25Automatic Headlights ..................................................... 41 Automatic High Beams .................................................. 41
Automatic Temperature Control (ATC) .......................... 49
Automatic Transaxle....................................................... 85
Automatic Transmission ................................................ 86 Adding Fluid .................................................... 237
, 269
Fluid And Filter Change........................................... 237
Fluid Change ........................................................... 237
Fluid Level Check .................................................... 236
Fluid Type .......................................................237
, 269
Special Additives ..................................................... 236
Auxiliary Electrical Outlet (Power Outlet) ...................... 52
Axle Fluid....................................................................... 269
Axle Lubrication ............................................................ 269
BBattery.................................................................... 72, 227
Charging System Light .............................................. 72
Keyless Key Fob Replacement................................. 14
Battery Saver Feature .................................................... 70
Belts, Seat..................................................................... 200
Blind Spot Monitoring .................................................. 159
Body Mechanism Lubrication ...................................... 230
B-Pillar Location ........................................................... 251
Brake Assist System..................................................... 155
Brake Control System, Electronic................................ 155
Brake Fluid.................................................................... 269
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278
Brake System ...................................................... 236, 265
Anti-Lock (ABS)........................................................ 265 Fluid Check..................................................... 236
, 269
Master Cylinder ....................................................... 236
Parking ....................................................................... 82
Warning Light ............................................................. 71
Brake/Transmission Interlock........................................86
Brightness, Interior Lights ....................................... 42
, 43
Bulb Replacement ....................................................... 246
Bulbs, Light................................................................... 201
CCamera, Rear ............................................................... 116
Capacities, Fuel............................................................ 268
Caps, Filler Fuel .......................................................................... 119
Oil (Engine) .............................................................. 226
Radiator (Coolant Pressure)................................... 234
Car Washes .................................................................. 263
Carbon Monoxide Warning .......................................... 202
Cargo Tie-Downs ............................................................. 64
Cellular Phone .............................................................. 153
Certification Label ........................................................ 120
Chains, Tire................................................................... 259
Change Oil Indicator ....................................................... 68
Changing A Flat Tire ..................................................... 206
Chart, Tire Sizing .......................................................... 247
Check Engine Light (Malfunction Indicator Light) .........79
Checking Your Vehicle For Safety ............................... 199
Checks, Safety.............................................................. 199
Child Restraint.............................................................. 188 Child Restraints
Booster Seats .......................................................... 191
Child Seat Installation ............................................. 198How To Stow An unused ALR Seat Belt .................195Infant And Child Restraints ..................................... 190
Lower Anchors And Tethers For Children............... 192
Older Children And Child Restraints....................... 190
Seating Positions ..................................................... 191
Child Safety Locks .......................................................... 25
Clean Air Gasoline ........................................................ 266
Cleaning Wheels .....................................................................262
Windshield Wiper Blades ........................................ 230
Climate Control ............................................................... 46 Automatic ................................................................... 46
Cold Weather Operation ................................................. 81
Compact Spare Tire ...................................................... 258
Connector Universal Consumer Interface (UCI) ......................... 51
Console............................................................................ 51 Floor ........................................................................... 51
Contract, Service .......................................................... 272
Cooling Pressure Cap (Radiator Cap) ..........................234
Cooling System ............................................................. 233 Adding Coolant (Antifreeze) ....................................234
Coolant Level ................................................. 233
, 235
Cooling Capacity ...................................................... 268
Disposal Of Used Coolant ....................................... 234 Drain, Flush, And Refill............................................233
Inspection ................................................................ 235 Points To Remember .............................................. 235
Pressure Cap ........................................................... 234
Radiator Cap............................................................ 234
Selection Of Coolant (Antifreeze) ........ 233
, 268, 269
Cornering Lights ............................................................. 41
Corrosion Protection .................................................... 262
Cruise Light ..................................................................... 77 Customer Assistance ................................................... 270
Cybersecurity ................................................................ 129
DDaytime Running Lights ................................................. 40Defroster, Windshield .................................................. 200
Dipsticks Oil (Engine) .............................................................. 227
Disabled Vehicle Towing .............................................. 220
Disposal Antifreeze (Engine Coolant) .................................... 234
Door Ajar .................................................................. 72
, 73
Door Ajar Light ......................................................... 72, 73
Door Locks ...................................................................... 22 Dead Lock Device ..................................................... 25
Passive Entry ............................................................. 23
Driving Through Flowing, Rising, Or Shallow Standing Water ............................... 128

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279
E
Electric Brake Control System..................................... 155 Anti-Lock Brake System ......................................... 154
Traction Control System ................................ 157
, 158
Electric Parking Brake ....................................................82
Electrical Power Outlets..................................................52 Electronic Stability Control (ESC) ................................ 156
Electronic Throttle Control Warning Light...................... 72Emergency Braking ...................................................... 164
Emergency Gas Can Refueling .................................... 217
Emergency, In Case Of Hazard Warning Flasher ......................................... 203
Jacking..................................................................... 206
Jump Starting .......................................................... 215
Towing ..................................................................... 220
Emission Control System Maintenance.........................79
Engine ........................................................................... 226 Air Cleaner ............................................................... 229Break-In Recommendations ..................................... 82
Checking Oil Level .................................................. 227Compartment .......................................................... 226
Compartment Identification ................................... 226Coolant (Antifreeze) ................................................ 269
Cooling..................................................................... 233
Exhaust Gas Caution .............................................. 202
Fails To Start .............................................................. 81
Flooded, Starting ....................................................... 81
Fuel Requirements ................................................. 266 Jump Starting .......................................................... 215
Oil ...........................................................228
, 268, 269
Oil Filler Cap ............................................................ 226 Oil Filter ....................................................................228
Oil Selection ................................................... 228
, 268
Oil Synthetic ............................................................. 228
Overheating ............................................................. 218
Starting....................................................................... 80
Enhanced Accident Response Feature ............. 184
, 222
Ethanol .......................................................................... 266
Exhaust Gas Cautions ..................................................202
Exhaust System .................................................. 202
, 232
Exterior Lighting .............................................................. 40
Exterior Lights ........................................................40
, 201
FFilters Air Cleaner ............................................................... 229
Air Conditioning ................................................50
, 230
Engine Oil ................................................................. 228
Engine Oil Disposal..................................................228
Flashers Hazard Warning ....................................................... 203
Turn Signals ...............................................42
, 77, 201
Flash-To-Pass .................................................................. 41
Flat Tire Changing ............................................... 246
, 258
Flat Tire Stowage ................................................ 246, 258
Flooded Engine Starting ................................................. 81
Floor Console .................................................................. 51
Fluid Capacities ............................................................268
Fluid Leaks ....................................................................201
Fluid Level Checks Brake ........................................................................ 236
Engine Oil ................................................................. 227 Fluid, Brake................................................................... 269
Fold-Flat Seats ................................................................ 28
Folding Rear Seats ......................................................... 28
Forward Collision Warning ........................................... 162
Freeing A Stuck Vehicle ............................................... 219
Fuel................................................................................ 266
Additives .................................................................. 267
Clean Air .................................................................. 266
Ethanol..................................................................... 266Filler Cap (Gas Cap) ................................................ 119Gasoline ................................................................... 266
Light ........................................................................... 75
Materials Added ...................................................... 267
Methanol ................................................................. 266
Octane Rating.................................................266
, 269
Specifications .......................................................... 269
Tank Capacity .......................................................... 268
Fuses ............................................................................. 237
GGarage Door Opener (HomeLink®)............................... 36
Gas Cap (Fuel Filler Cap) ............................................. 119
Gasoline, (Fuel) ............................................................ 266
Gasoline, Clean Air ....................................................... 266
Gasoline, Reformulated ............................................... 266
Gear Ranges ................................................................... 86
Gear Selector Override................................................. 218
Gear Shift Indicator ........................................................ 68 Glass Cleaning .............................................................. 264
Gross Axle Weight Rating ............................................. 121
Gross Vehicle Weight Rating ....................................... 121
GVWR ............................................................................ 120
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281
Headlight Switch ........................................................40
Headlights ..................................................................40
Headlights On With Wipers .......................................41
High Beam...........................................................40
, 78
High Beam/Low Beam Select ...................................40
Hood Open .................................................................73
Intensity Control ..................................................42
, 43
Interior ........................................................................42
LaneSense .................................................................75
Liftgate Open.............................................................. 73
Lights On Reminder ...................................................41
Low Fuel .....................................................................75
Malfunction Indicator (Check Engine) ...................... 75
Oil Pressure ................................................................73
Oil Temperature .........................................................73
Park ............................................................................77
Passing ....................................................................... 41
Seat Belt Reminder ...................................................73
Security Alarm ............................................................73
Service ..................................................................... 246
Service Forward Collision Warning ...........................75
Service Stop Start ...................................................... 75
Stop Start Active ........................................................77
Tire Pressure Monitoring (TPMS) .................... 75
, 165
Towing Hook Breakdown...........................................76
Traction Control ...................................................... 157
Transmission Temperature .......................................76
Turn Signals ....................................... 40
, 42, 77, 201
Vanity Mirror............................................................... 34
Loading Vehicle ............................................................ 120 Tires ......................................................................... 251
Locks Auto Unlock ................................................................25
Child Protection .........................................................25
Power Door .................................................................22 Low Tire Pressure System ............................................165
Lubrication, Body .......................................................... 230
Lug Nuts/Bolts .............................................................. 265
MMaintenance ................................................................... 58
Maintenance Free Battery ...........................................227
Maintenance Schedule ................................................ 223
Malfunction Indicator Light (Check Engine) .................. 75Manual Service .....................................................................274
Memory Feature (Memory Seats) .................................. 27
Memory Seat ................................................................... 27 Memory Settings............................................................. 27
Methanol ....................................................................... 266
Mirrors ............................................................................. 34 Automatic Dimming................................................... 34
Heated................................................................. 34
, 36
Outside ................................................................ 34, 35
Rearview ...........................................................34, 203
Vanity.......................................................................... 34
Modifications/Alterations Vehicle.......................................................................... 8
Monitor, Tire Pressure System..................................... 165
Mopar Parts .................................................................. 273
Multi-Function Control Lever .......................................... 40
NNew Vehicle Break-In Period .......................................... 82
OOccupant Restraints ..................................................... 168
Octane Rating, Gasoline (Fuel) .......................... 266, 269
Oil Change Reset
b
...................................................... 68 Oil Filter, Change .......................................................... 228
Oil Filter, Selection ....................................................... 228
Oil Pressure Light ........................................................... 73
Oil, Engine ............................................................ 228
, 269
Capacity ................................................................... 268
Checking .................................................................. 227
Dipstick .................................................................... 227
Disposal ................................................................... 228
Filter ......................................................................... 228
Filter Disposal.......................................................... 228
Identification Logo .................................................. 228
Materials Added To ................................................. 228 Pressure Warning Light ............................................ 73
Recommendation...........................................228
, 268
Synthetic .................................................................. 228
Viscosity ................................................................... 268
Onboard Diagnostic System .......................................... 78
Operator Manual Owner's Manual ...................................................... 274
Outlet Power ......................................................................... 52
Outside Rearview Mirrors ....................................... 34
, 35
Overheating, Engine ..................................................... 218
PPaint Care ..................................................................... 262
Panic Alarm ..................................................................... 13 Parking Brake ................................................................. 82
ParkSense Front And Rear ........................................................ 105
ParkSense Active Park Assist ...................................... 108
ParkSense System ....................................................... 105
Pedestrian Warning System ........................................ 164
Performance .......................................................... 69
, 152
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