2015 JEEP CHEROKEE Spark plug

•Change the engine oil and oil filter.
•Disconnect and reconnect the battery to reset the
engine controller memory.
More extensive repairs will be required for prolonged
exposure to E-85 fuel.
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. Gasoline 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.
Materials Added To Fuel
All gasoline sold in the United States is required to
contain effective detergent additives. Use of additional
detergents or other additives is not needed under normal
conditions and they would result in additional cost.
Therefore, you should not have to add anything to the
fuel.
582 STARTING AND OPERATING

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’s specifica-
tions, should be obtained immediately.
To minimize the possibility of catalytic converter dam-
age:
•Do not shut off the engine or interrupt the ignition,
when the transmission is in gear and the vehicle is in
motion.
•Do not try to start the engine by pushing or towing the
vehicle.
•Do not idle the engine with any spark plug wires
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 try to open a cooling system pressure
cap when the radiator or coolant bottle is hot.
686 MAINTAINING YOUR VEHICLE

FLUIDS, LUBRICANTS AND GENUINE PARTS
Engine
ComponentFluid, Lubricant, or Genuine Part
Engine CoolantWe recommend you use MOPAR® Antifreeze/Coolant 10 Year/150,000 Mile
Formula OAT (Organic Additive Technology) or equivalent meeting the require-
ments of Chrysler Material Standard MS-12106.
Engine Oil – 2.4L Engine We recommend you use SAE 0W-20 API Certified Engine Oil, meeting the
requirements of Chrysler Material Standard MS-6395 such as MOPAR®, Penn-
zoil®, and Shell Helix®. Refer to your engine oil filler cap for correct SAE grade.
Engine Oil – 3.2L Engine We recommend you use API Certified SAE 5W-20 Engine Oil, meeting the
requirements of Chrysler Material Standard MS-6395 such as MOPAR®, Penn-
zoil®, and Shell Helix®. Refer to your engine oil filler cap for correct SAE grade.
Engine Oil FilterWe recommend you use a MOPAR® Engine Oil Filter.
Spark Plugs – 2.4L Engine We recommend you use MOPAR® Spark Plugs.
Spark Plugs – 3.2L Engine We recommend you use MOPAR® Spark Plugs.
Fuel Selection – 2.4L/3.2L En-
gines
87 Octane
728 MAINTAINING YOUR VEHICLE

Maintenance Chart
Mileage or time passed (whichever comes first)20,00030,00040,00050,00060,00070,00080,00090,000100,000110,000120,000130,000140,000150,000
Or Years:2 3 4 5 6 7 8 9 10 11 12 13 14 15
Or Kilometers:32,00048,00064,00080,00096,000112,000128,000144,000160,000176,000192,000208,000224,000240,000
Additional Inspections
Inspect the CV joints.XXX X X X X
Inspect front suspension, boot seals. tie rod ends,and replace if necessary.XXX X X X X
Inspect the brake linings, parking brake function. X X X X X X X
Additional Maintenance
Replace engine air cleaner filter.XXXXX
Replace air conditioning/cabin air filter.XXX X X X X
Replace spark plugs – 2.4L Engine **X
8
MAINTENANCE
SCHEDULES
734 MAINTENANCE SCHEDULES

Mileage or time passed (whichever comes first)20,00030,00040,00050,00060,00070,00080,00090,000100,000110,000120,000130,000140,000150,000
Or Years:2 3 4 5 6 7 8 9 10 11 12 13 14 15
Or Kilometers:32,00048,00064,00080,00096,000112,000128,000144,000160,000176,000192,000208,000224,000240,000
Replace spark plugs – 3.2L Engine **X
Flush and replace the engine coolant at 10 yearsor 150,000 miles (240,000 km) whichever comesfirst.XX
Inspect and replace PCV valve if necessary.X
** The spark plug change interval is mileage based only,
yearly intervals do not apply.
8
MAINTENANCE
SCHEDULES
MAINTENANCE SCHEDULES 735

Seats..................................149
Adjustment...........................149
Easy Entry............................165
Head Restraints........................157
Memory..............................162
Rear Folding..........................159
Seatback Release........................153
Tilting...............................153
Security Alarm............................19
Arm The System........................19
Selec-Terrain.............................503
Selection of Coolant (Antifreeze)...............728
SENTRY KEY®
FCC General Information..................18
Key Programming.......................18
Sentry Key (Immobilizer)....................16
Sentry Key Replacement.....................18
Service Assistance.........................739
Service Contract..........................741
Service Manuals..........................744
Shifting
Automatic Transmission..................484
Power Transfer Unit, Shifting into Power Transfer
Unit Neutral (N)........................608
Transfer Case, Shifting into Transfer Case
Neutral (N)...........................608
Transfer Case, Shifting out of Transfer Case
Neutral (N)...........................611
Shift Lever Override.......................647
Shoulder Belts............................55
Side View Mirror Adjustment.................137
Signals, Turn............................120
Snow Chains (Tire Chains)...................564
Snow Tires..............................557
Spare Tire...............................559
Spark Plugs.............................728
Specifications
Fuel (Gasoline).........................728
764 INDEX