Automobile Engineering in ME
The brake warning light warns the driver of

Water in the master cylinder
Power brake failure
Air in the hydraulic system
Failure of the primary or secondary circuit of hydraulic system

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Automobile Engineering in ME
The function of positive crankcase ventilation (PCV) system is that it

Feeds blow by gases to the exhaust manifold
Promotes combustion by creating a swirling movement in the air-fuel mixture
Returns blow by gases from the crankcase to the intake system
Mixes fuel with air

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