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

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

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

Mixes fuel with air
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

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