2019 Ram 4500 Chassis Cab engine overheat

432 SERVICING AND MAINTENANCE
system and adjacent body areas for broken, damaged, dete-
riorated, 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 lubrica -
tion or oil change. Replace as required.
Under normal operating conditions, the catalytic converter
will not require maintenance. However, it is important to
keep the engine properly tuned to assure proper catalyst
operation and prevent possible catalyst damage.
NOTE:
Intentional tampering with emissions control systems can
result in civil penalties being assessed against you.
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 eventu -
ally poison you. To avoid breathing CO, refer to “Safety
Tips” in “Safety” for further information.
• A hot exhaust system can start a fire if you park over materials that can burn. Such materials might be grass
or leaves coming 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 opera -
tion of your vehicle with a severe malfunction could
cause the converter to overheat, resulting in possible
damage to the converter and vehicle.

SERVICING AND MAINTENANCE 433
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's specifications, should
be obtained immediately.
To minimize the possibility of catalytic converter damage:
• Do not interrupt the ignition when the transmission is ingear 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 when diagnostic testing,
or for prolonged periods during very rough idle or
malfunctioning operating conditions.Cooling System
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.
7

593
Differential, Limited Slip ....................................................... 281
Dipsticks Power Steering..................................................................... 284
Disabled Vehicle Towing ....................................................... 406
Disposal Antifreeze (Engine Coolant) .............................................. 436
Do Not Disturb ........................................................................ 579
Door Ajar.................................................................................. 150
Door Ajar Light ....................................................................... 150
Door Locks Automatic ............................................................................... 37
Doors........................................................................................... 32
Drag And Drop Menu ............................................................ 487
Driver’s Seat Back Tilt .............................................................. 39
Driving
Through Flowing, Rising, Or Shallow Standing Water ....364

Dual Rear Wheels ................................................... 396, 467, 477 E
Electric Brake Control System ............................................... 162 Anti-Lock Brake System ..................................................... 161
Electronic Roll Mitigation .......................................... 166, 170
Electrical Power Outlets......................................................... 117
Electronic Range Select (ERS)........................................ 262, 270
Electronic Stability Control (ESC) ........................................ 166
Electronic Throttle Control Warning Light ......................... 149
Electronically Shifted Transfer Case .................................... 272 Emergency Braking.................................................................252
Emergency, In Case Of Freeing Vehicle When Stuck ..............................................405Hazard Warning Flasher ....................................................366
Jacking...................................................................................390
Jump Starting .......................................................................398
Emission Control System Maintenance ...............................159
Engine .......................................................................................415 Air Cleaner ...........................................................................420
Break-In Recommendations...............................................251Compartment Identification ..............................................415Coolant (Antifreeze)............................................................ 484
Exhaust Gas Caution................................................... 240, 482Fails To Start.........................................................................249
Flooded, Starting .................................................................249
Fuel Requirements ..............................................................479
Jump Starting .......................................................................398Oil ..................................................................................418, 484
Oil Filler Cap ................................................................415, 419
Oil Filter ................................................................................419Oil Reset ................................................................................130Oil Selection .........................................................................418
Oil Synthetic .........................................................................419
Overheating..........................................................................401
Starting..................................................................................246
Engine Oil Viscosity................................................................419
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598
O
Occupant Restraints................................................................ 187
Octane Rating, Gasoline (Fuel) ............................................. 479
Oil Filter, Change .................................................................... 419
Oil Filter, Selection.................................................................. 419
Oil Pressure Light ................................................................... 148
Oil Reset ................................................................................... 130
Oil, Engine ....................................................................... 418, 484 Capacity ................................................................................ 483
Change Interval ................................................................... 418Dipstick................................................................................. 416
Disposal ................................................................................ 419
Filter .............................................................................. 419, 484
Filter Disposal ...................................................................... 419
Identification Logo.............................................................. 418Materials Added To ............................................................ 419
Pressure Warning Light ..................................................... 148
Recommendation ................................................................ 418
Synthetic ............................................................................... 419Viscosity ............................................................................... 419
Onboard Diagnostic System .................................................. 158
Operating Precautions............................................................ 158
Operator Manual Owner's Manual ............................................................ 13, 589
Outside Rearview Mirrors ....................................................... 58
Overdrive ................................................................................. 263 Overdrive OFF Switch............................................................263
Overheating, Engine ...............................................................401 P
Paint Care .................................................................................470
Panic Alarm ...............................................................................18
Parking Brake ..........................................................................252
ParkSense System, Rear .................................................309, 317
Passive Entry..............................................................................34
Pedals, Adjustable .....................................................................55
Personalized Main Menu .......................................................487
Pets ............................................................................................240
Placard, Tire And Loading Information ..............................450
Power Distribution Center (Fuses)................................................381
Door Locks .............................................................................33
Mirrors ....................................................................................59
Outlet (Auxiliary Electrical Outlet) ..........................117, 119 Seats.........................................................................................42
Sliding Rear Window............................................................94
Steering ...................................................................59, 283, 284 Take-Off Adapter ................................................................281
Take-Off Operation .............................................................281
Windows.................................................................................92
Power Seats Down .......................................................................................42
Forward ..................................................................................42