Kia Optima Hybrid 2017 Owner's Manual page 646

• Do not misuse or abuse the engine.
Examples of misuse are coasting with
the ignition off and descending steep
grades in gear with the ignition off.
• Do not operate the engine at high idle
speed for extended periods (5 mi‐
nutes or more).
• Do not modify or tamper with any
part of the engine or emission control
system. All inspections and adjust‐
ments must be made by an author‐
ized Kia dealer.
• Avoid driving with an extremely low
fuel level. Running out of fuel could
cause the engine to misfire, damag‐
ing the catalytic converter.
Failure to observe these precautions
could result in damage to the catalytic
converter and to your vehicle.
Additionally, such actions could void
your warranties.
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