engine overheat FIAT 500C 2018 User Guide

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 sys-
tems 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’s 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 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.
Coolant Checks
Check engine coolant (antifreeze) protection every 12
months (before the onset of freezing weather, where appli-
cable). If the engine coolant (antifreeze) is dirty or rusty in
appearance, the system should be drained, flushed and248 SERVICING AND MAINTENANCE

Cooling System Pressure Cap
The cap must be fully tightened to prevent loss of engine
coolant (antifreeze), and to ensure that engine coolant
(antifreeze) will return to the radiator from the coolant
expansion bottle/recovery tank if so equipped.
The cap should be inspected and cleaned if there is any
accumulation of foreign material on the sealing surfaces.
WARNING!• Do not open 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. Disposal Of Used Coolant
Used ethylene glycol-based coolant (antifreeze) is a regu-
lated 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 contain-
ers 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.
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 coolant
(antifreeze) in the bottle should be between the “MAX” and
“MIN” lines marked on the bottle.
As long as the engine operating temperature is satisfactory,
the coolant bottle need only be checked once a month.
When additional coolant (antifreeze) is needed to maintain
the proper level, it should be added to the coolant bottle.
Do not overfill.
See an authorized dealer for service. 8SERVICING AND MAINTENANCE 251

CNG And LP Fuel System Modifications
Modifications that allow the engine to run on Compressed
Natural Gas (CNG) or Liquid Propane (LP) may result in
damage to the engine, emissions, and fuel system compo-
nents. Problems that result from running CNG or LP are
not the responsibility of the manufacturer and may void or
not be covered under the New Vehicle Limited Warranty.
MMT In Gasoline
Methylcyclopentadienyl Manganese Tricarbonyl (MMT) is
a manganese-containing metallic additive that is blended
into some gasoline to increase octane. Gasoline blended
with MMT provides no performance advantage beyond
gasoline of the same octane number without MMT. Gaso-
line blended with MMT reduces spark plug life and
reduces emissions system performance in some vehicles.
The manufacturer recommends that gasoline without
MMT be used in your vehicle. The MMT content of
gasoline may not be indicated on the gasoline pump;
therefore, you should ask your gasoline retailer whether
the gasoline contains MMT. MMT is prohibited in Federal
and California reformulated gasoline. Fuel System Cautions
CAUTION!Follow these guidelines to maintain your vehicle’s
performance:
• The use of leaded gasoline is prohibited by Federal
law. Using leaded gasoline can impair engine perfor-
mance and damage the emissions control system.
• An out-of-tune engine or certain fuel or ignition
malfunctions can cause the catalytic converter to
overheat. If you notice a pungent burning odor or
some light smoke, your engine may be out of tune or
malfunctioning and may require immediate service.
Contact an authorized dealer for service assistance.
• The use of fuel additives, which are now being sold
as octane enhancers, is not recommended. Most of
these products contain high concentrations of metha-
nol. Fuel system damage or vehicle performance
problems resulting from the use of such fuels or
additives is not the responsibility of the manufac-
turer and may void or not be covered under the New
Vehicle Limited Warranty. 9TECHNICAL SPECIFICATIONS 289

Electronic Brake Control System ............... .101
Electronic Stability Control (ESC) .............. .103
Electronic Throttle Control Warning Light ..........86
Emergency, In Case Of
Hazard Warning Flasher .................. .197
Jacking ............................... .255
Jump Starting .......................... .220
Towing ............................... .226
Emission Control System Maintenance ............96
Engine
Air Cleaner ............................ .240
Break-In Recommendations ................ .163
Checking Oil Level ...................... .236
Compartment .......................... .235
Cooling .............................. .248
Exhaust Gas Caution .................. .154, 290
Fails To Start ........................... .162
Flooded, Starting ........................ .162
Fuel Requirements ................... .287, 291
Oil .............................. .238, 290
Oil Filler Cap .......................... .239
Oil Filter .............................. .240
Oil Selection ........................ .238, 291
Oil Synthetic ........................... .239
Overheating ........................... .224 Starting .............................. .161
Enhanced Accident Response Feature ........ .133, 228
Ethanol ................................. .288
Exhaust Gas Cautions ................... .154, 290
Exhaust System ....................... .154, 247
Exterior Lighting ............................37
Exterior Lights ...................... .37, 157, 197
Filters
Air Cleaner ............................ .240
Air Conditioning ..................... .55, 242
Engine Fuel ........................... .291
Engine Oil ............................ .240
Engine Oil Disposal ...................... .239
Flashers
Turn Signals ...................... .37, 94, 157
Flash-To-Pass ..............................37
Flooded Engine Starting ..................... .162
Fluid, Brake ............................. .293
Fluid Capacities ........................... .290
Fluid Leaks .............................. .157
Fluid Level Checks
Brake ................................ .253
Engine Oil ............................ .236
Fluids .................................. .29112 INDEX 325

Checking ............................. .236
Dipstick .............................. .236
Disposal .............................. .239
Filter ................................ .240
Filter Disposal .......................... .239
Identification Logo ...................... .238
Materials Added To ...................... .239
Pressure Warning Light .....................87
Recommendation .................... .238, 290
Synthetic ............................. .239
Viscosity .............................. .239
Oil Filter, Change ......................... .240
Oil Filter, Selection ......................... .240
Oil Pressure Light ...........................87
Onboard Diagnostic System ....................95
Operating Precautions ........................95
Operator Manual (Owner’s Manual) ...............5
Outlet
Power .................................68
Outside Rearview Mirrors .....................34
Overheating, Engine ....................... .224
Owner’s Manual (Operator Manual) ...........5,320
Paint Care ............................... .277
Parking Brake ............................ .164 Passing Light ..............................38
Pets ................................... .153
Placard, Tire And Loading Information .......... .259
Power
Brakes ............................... .285
Door Locks ..............................25
Mirrors ................................36
Outlet (Auxiliary Electrical Outlet) .............68
Steering .............................. .177
Sunroof ................................57
Pregnant Women And Seat Belts ............... .120
Pretensioners
Seat Belts ............................. .121
Radial Ply Tires ........................... .265
Radiator Cap (Coolant Pressure Cap) ............ .251
Radio Frequency
General Information .................... .19, 22
Radio Operation .......................... .308
Rear Camera ............................. .185
Rear Liftgate (Sedan) .........................65
Recreational Towing ........................ .190
Reformulated Gasoline ...................... .287
Refrigerant .............................. .241
Release, Hood ..............................63 12 INDEX 329