2006 KIA Optima check engine

1. Turn the ignition switch and all other
switches off.
2. Pull the suspected fuse straight out.
Use the removal tool provided on the
main fuse box in the engine
compartment. Refer to the fuse panel
chart on the fuse panel cover to
identify the likely problem fuse or
electrical circuit.
3. Check the removed fuse; replace if it
is blown.
Four (4) spare fuses are provided in the
engine compartment fuse panel cover.4. Push in a new fuse of the same
rating, and make sure it fits tightly in
the clips.
If it fits loosely, consult an
Authorized Kia Dealer.
If you do not have a spare, use a fuse of
the same rating from a circuit you may
not need for operating the vehicle, such
as the radio or clock (Room) fuse.
If the headlights or other electrical
components do not work and the fuses
are OK, check the fuse box in the engine
compartment. If a fuse is blown, it must
be replaced.
1. Turn the ignition switch and all other
switches OFF.
2. Remove the fuse box cover by
turning the plastic knob located in the
cover counterclockwise until the
cover can be removed.
3. Check the fuses. If one is blown,
replace it with a new one of the same
rating.
IN CASE OF EMERGENCY
6-8
MMSA6020
MMSA6005
Fuse box
CAUTION
After checking the fuse box in the
engine compartment, please
securely install the fuse box cover.
If not, some electrical failures may
occur causing from the water.
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7-3
MAINTENANCE SCHEDULEEngine Control systemI: Inspect these items and their related parts. If necessary,
Check the engine oil and coolant levels every week.
R: Replace or change.
NOTE :
Check the engine oil and coolant levels every week.
Kilometers or Time in Months, Whichever Comes First
km 8 16 24 32 40 48 56 64 72 80 88 96 104 112 120 128Months 4 8 12 16 20 24 28 32 36 40 44 48 52 56 60 64
Engine oil & engine oil filter R R R R R R R R R R R R R R R R
Drive belts (tension)III I
Cooling system hoses & connectionsIIII I
Engine coolant II IIIRIIIIIRIIII
Fuel filterR
Fuel tank cap, lines, EVAP canister and hosesII
Fuel tank air filterIRIR I
Air cleaner element II IIIRIIIIIRIIII
MAINTENANCE
INTERVALS
MAINTENANCE
ITEM
x 1,000
(1)
(1)
(2)
(1) Refer to the lubricant and coolant specifications in the Owner’s Manual.
(2) More frequent maintenance is required if driving under dusty conditions.
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MAINTENANCE
7-8OWNER MAINTENANCEOWNER MAINTENANCE
SCHEDULEA qualified service technician should
perform these vehicle inspections at the
indicated intervals to ensure safe and
dependable operation.
Bring any problem to the attention of an
Authorized Kia Dealer as soon as
possible.WHEN REFUELING, CHECK:• Engine oil level
• Engine coolant level
• Brake and clutch fluid level
• Washer fluid level
AT LEAST MONTHLY• Tire inflation pressuresEVERY 6 MONTHS, CHECK:• Power steering fluid level
• Automatic transaxle fluid level
You can do the following scheduled
maintenance items if you have some
mechanical ability, a few basic tools and
if you closely follow the directions in
this manual.OWNER MAINTENANCE
PRECAUTIONSImproper or incomplete service may
result in problems. This section gives
instructions only for the maintenance
items that are easy to perform.As explained earlier in this section, several
procedures can be done only by a qualified
service technician with special tools.
Improper owner maintenance during the
warranty period may affect warranty
coverage. For details, read the separate
Kia Warranty and Consumer Information
Manual provided with the vehicle. If
you’re unsure about any servicing or
maintenance procedure, have it done by
an Authorized Kia Dealer.
CAUTION
Be careful when checking your
engine coolant level. The engine
compartment will be hot and you
could be burned.
WARNING - Maintenance
Work
Performing maintenance work
on a vehicle can be dangerous.
You can be seriously injured
while performing some
maintenance procedures. If you
lack sufficient knowledge,
experience or the proper tools
and equipment to do the work,
have it done by a qualified
technician.
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MAINTENANCE
7-12ENGINE OIL AND OIL
FILTERChecking the Engine Oil Level
1. Be sure the vehicle is on level
ground.
2. Start the engine and allow it to reach
normal operating temperature.
3. Turn the engine off and wait a few
minutes for the oil to return to the oil
pan.
4. Pull out the dipstick, wipe it clean,
and re-insert it fully.
5. Pull the dipstick out again and check
the level. The level should be
between F and L.
If it is near or at L, add enough oil to
bring the level to F. Do not overfill.
The distance between L and F on the
dipstick represents 0.85 US qt. (0.7 liter).
Use only the specified engine oil.(Refer to “Recommended Lubricants”
later in this section)
CHANGING THE ENGINE
OIL AND FILTERChange engine oil and filter according to
the Scheduled Maintenance earlier in this
section.
1. Warm the engine up for a few
minutes and then turn it off. Remove
the oil filler cap.
2. Drain the oil into a suitable container
after removing the oil filler cap and
drain plug.
MMSA7003
WARNING - Engine Oil
 Continuous contact with
USED engine oil has caused
skin cancer in laboratory
mice. Protect your skin by
washing with soap and
water.
 Keep all engine oil out of the
reach of children.
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7-13
3. Remove the engine oil filter with an
oil filter wrench.
4. Use a clean rag to clean the oil filter
mounting surface on the engine.
5. Apply a small amount of engine oil
to the new oil filter O-ring seal.6. Install the oil filter and tighten it.
(Refer to the oil filter caution label
for tightening instructions.)
7. Replace the drain plug tightly after
the oil has thoroughly drained.
8. Refill the engine with new oil to the
F mark on the dipstick. Do not
overfill.
9. Re-install the oil filler cap securely.
10. Start the engine and inspect around
the oil filter seal for leaks.
Stop the engine.
Check the oil level and fill to the F
mark, if necessary.
OIL CAPACITY
2400cc Engine
- Without filter change : 4.0 liters
- With filter change : 4.3 liters

2700cc Engine
- Without filter change : 4.5 liters
- With filter change : 4.8 liters
Use only the specified engine oil. (Refer
to “Recommended Lubricants” later in
this section)
CAUTION
Both the oil and engine are hot. Do
not burn yourself.✻
NOTICE
When installing the replacement oil
filter, do not allow the oil filter
gasket to remain on the oil filter
mounting surface. This will cause
oil leakage and engine damage.
Remove the old gasket completely
so that a new gasket will properly
seat and seal.
✻
NOTICE
• Follow these instructions
carefully. An improper oil filter
installation can cause oil leakage
and engine damage.
• Although oil filters may have the
same external appearance, their
internal designs differ
significantly. These filters are not
interchangeable. To avoid
potential engine damage, use only
the specified filter. Consult an
Authorized Kia Dealer.
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MAINTENANCE
7-14ENGINE COOLING
SYSTEMThe cooling system is a high-pressure
type with a reservoir and is filled with
year-round antifreeze coolant at the
factory.
Check the antifreeze protection and
coolant level at least once a year, at the
beginning of the winter season, and
before traveling to a colder climate.
CHECKING THE
COOLANT LEVEL
WARNING - Removing
Radiator Cap
 Never attempt to remove the
radiator cap while the engine
is operating. Doing so might
lead to cooling system
and/or engine damage and
could result in serious
personal injury from
escaping hot coolant or
steam.
 Turn the engine off and wait
until it has cooled. Even then,
use extreme care when
removing the radiator cap.
Wrap a thick towel around it,
and turn it counterclockwise
slowly to the first stop. Step
back while the pressure is
released from the cooling
system. When you are sure
all the pressure has been
released, press down on the
cap, using a thick towel, and
continue turning
counterclockwise to remove
it.
 Even if the engine is not
operating, do not remove the
radiator cap or the drain plug
while the engine and radiator
are hot. Hot coolant and
steam may still blow out
under pressure, causing
serious injury.
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7-15
Check the condition and connections of
all cooling system hoses and heater
hoses. Replace any swollen or
deteriorated hoses.
The coolant level should be full in the
radiator and between F (Full) and L
(Low) on the coolant reservoir tank
when the engine is cool.If the coolant level is low, add enough
specified coolant to provide protection
against freezing and corrosion and to
bring the level to F in the coolant
reservoir. Do not overfill. If frequent
additions are required, see an Authorized
Kia Dealer for a cooling system
inspection.
CHANGING COOLANTChange coolant according to the
Scheduled Maintenance.
• Use only soft (de-mineralized) water
in the coolant mixture.
• The engine in your vehicle has
aluminum engine parts and must be
protected by an ethylene glycol-
based coolant to prevent corrosion
and freezing.
• DO NOT USE alcohol or methanol
coolant and do not mix them with the
specified coolant.•Do not use a solution that contains
more than 60% coolant or less than
35% coolaut, which would reduce
the effectiveness of the solution.
For mixture percen-tages, refer to the
following table.
1. Turn the radiator cap counterclockwise
and remove it.
2. Loosen the radiator drain plug and
drain the coolant into a suitable
container.
MMSA7005
Coolant reservoir tank
-15°C (5°F) 35 65
-25°C (-13°F) 40 60
-35°C (-31°F) 50 50
-45°C (-49°F) 60 40Ambient
TemperatureMixture Percentage (volume)
Coolant
SolutionWater
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MAINTENANCE
7-163. With the drain plug loose, flush the
system with running water.
4. Drain the system completely and
retighten the drain plug. Add the
necessary amount of ethylene glycol
based coolant and water to provide
the required protection against
freezing and corrosion.
In extremely cold climates, add the
necessary amount of ethylene glycol-
based coolant in accordance with the
instructions of the coolant
manufacturer.5. Run the engine at idle with the
radiator cap off. Slowly add
additional coolant if necessary.
6. At this point, wait until the engine
reaches normal operating temperature.
Depress the accelerator two or three
times; then add coolant if required. Be
careful not to burn yourself.
7. Install the radiator cap. Inspect all
connections for leaks and recheck the
coolant level in the reservoir.
Recheck again after a few days of
driving and add coolant as necessary.
MMSA7036
Drain plugRadiator cap
MS-CNA-Eng 7.QXD 7/25/2005 5:09 PM Page 16