22,500 miles (36,000 km) or 18 months
Hyundai Sonata / Sonata 2011 Owners Manual / Maintenance / Scheduled maintenance service / 22,500 miles (36,000 km) or 18 months
❑ Inspect air cleaner filter ❑ Inspect vacuum hose ❑ Replace engine oil and filter (22,500 miles (36,000 km) or 36 months)
See also:
Keys
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Bi-level heating
Your Hyundai is equipped with bi-level heating
controls. To use this feature:
o Set the air intake control to the fresh air
() position.
o Set the air flow control at the bi-level ()
position.
...
Crankcase Emission Control System
The positive crankcase ventilation system is employed to prevent air pollution
caused by blow-by gases being emitted from the crankcase. This system supplies filtered
fresh air to the crankcase th ...


