Illumination of the Check Engine Light can be caused by a loose or worn gas cap.
Problems for specific Buick Century years:
Car problem reports
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Most reported Buick Century problems
Car stalls for no apparent reason while driving down road, changed oil sensor, crank sensor and fuel pump. No check engine light on
The front struts may show signs of wear, or be excessively bouncy ride at freeway speeds. This may begin to occur at around 75,000 miles.
One or more of the power windows may stop working due to a failed window switch. Failed switches will require replacement.
It is very common for the high pressure power steering rubber hoses to leak. Our technicians recommend replacing leaky rubber hoses to prevent the loss of power steering.
The engine temperature sensor wire for the engine temperature gauge, or warning light, may touch the rear exhaust manifold causing a short to ground causing erratic operation of the temperature gauge or warning light.
Illumination of the Check Engine Light may be the result of a loose or worn gas cap.