Kia Optima: Change to "winter weight" oil if
necessary
In some climates it is recommended that a lower viscosity "winter weight" oil be used during cold weather. See section 8 for recommendations. If you aren't sure what weight oil you should use, consult an authorized Kia dealer.
Check battery and cables
Winter puts additional burdens on the
battery system. Visually inspect the battery
and cables as described in section
7. The level of charge in your battery can
be checked by an authorized Kia ...
Check spark plugs and ignition
system
Inspect your spark plugs as described in
section 7 and replace them if necessary.
Also check all ignition wiring and components
to be sure they are not cracked,
worn or damaged in any way. ...
See also:
Canister Close Valve (CCV). Specifications
Specification
Item
Specification
Coil Resistance (Ω)
19.8 ~ 21.8 [20°C(68°F)]
...
Installation
1.
Remove the ignition key from
the vehicle.
2.
Disconnect the battery negative
cable from battery and wait for at least three minutes before beginning
work.
...
EPB connector input/output
Pin No.
Function
Pin No.
Function
1
-
21
Gear switch
2
-
22
...